View source for Engineering:Seven-segment display

{{short description|Form of electronic display device for displaying decimal numerals}}
[[File:Seven segment 01 Pengo.jpg|280px|thumb|right|A typical 7-segment [[Engineering:Light-emitting diode|LED]] display component, with decimal point in a wide DIP-10 package]]
A '''seven-segment display''' is a form of electronic [[Engineering:Display device|display device]] for displaying [[Decimal|decimal]] [[Numeral system|numerals]] that is an alternative to the more complex dot matrix displays.

Seven-segment displays are widely used in [[Engineering:Digital clock|digital clock]]s, electronic meters, basic calculators, and other electronic devices that display numerical information.<ref>{{cite web |title=Seven Segment Displays |url=https://sharedserver.rsd17.org/teacherwebpages/ryankish/Shared%20Documents/2.3%20Date%20of%20Birth%20machine/Seven-segment%20displays.ppt |archive-url=https://web.archive.org/web/20120404071304/https://sharedserver.rsd17.org/teacherwebpages/ryankish/Shared%20Documents/2.3%20Date%20of%20Birth%20machine/Seven-segment%20displays.ppt |url-status=dead |archive-date=2012-04-04}}</ref>

==History==
Seven-segment representation of figures can be found in [[Social:Patent|patent]]s as early as 1903 (in {{US patent|1126641}}), when Carl Kinsley invented a method of telegraphically transmitting letters and numbers and having them printed on tape in a segmented format. In 1908, F. W. Wood invented an 8-segment display, which displayed the number 4 using a diagonal bar ({{US patent|974943}}). In 1910, a seven-segment display illuminated by incandescent bulbs was used on a power-plant boiler room signal panel.<ref>{{cite journal |author-first=Warren O. |author-last=Rogers |title=Power Plant Signalling System |url=https://books.google.com/books?id=0sIfAQAAMAAJ&pg=PA204 |journal=Power and the Engineer |volume=32 |number=5 |date=1910-02-01 |pages=204–206 |access-date=6 October 2016 |archive-url=https://web.archive.org/web/20140331102649/http://books.google.com/books?id=0sIfAQAAMAAJ&pg=PA204 |archive-date=31 March 2014 |url-status=live}}</ref> They were also used to show the dialed telephone number to operators during the transition from manual to automatic telephone dialing.<ref>{{cite journal |author-first=E. H. |author-last=Clark |title=Evolution of the Call-Indicator System |url=http://www.americanradiohistory.com/Archive-Bell-Laboratories-Record/20s/Bell-Laboratories-Record-1929-12.pdf |journal=Bell Laboratories Record |volume=8 |number=5 |date=December 1929 |pages=171–173}}</ref> They did not achieve widespread use until the advent of LEDs in the 1970s. 

[[File:Incandescent light seven-segment display prPNr°17.jpg|thumb|Filament seven-segment display]]
Some early seven-segment displays used incandescent filaments in an evacuated bulb; they are also known as numitrons.<ref>{{Cite web|url=http://www.industrialalchemy.org/articleview.php?item=65|title=IEE Apollo DA-2110 Numitron Tube (DA2110, RCA DR-2110) - Industrial Alchemy |website=www.industrialalchemy.org}}</ref> A variation (minitrons) made use of an evacuated [[Engineering:Potting (electronics)|potted]] box. Minitrons are filament segment displays that are housed in DIP ([[Engineering:Dual in-line package|dual in-line package]]) packages like modern LED segment displays. They may have up to [[Engineering:Sixteen-segment display|16 segments]].<ref>{{Cite web |url=http://www.industrialalchemy.org/articleview.php?item=777 |title=Wamco KW-105AL Alphanumeric Minitron Display - Industrial Alchemy |website=www.industrialalchemy.org}}</ref><ref>{{Cite web |url=https://hackaday.com/2011/12/21/numitron-tube-tutorial/ |title=Numitron Tube Tutorial|date=21 December 2011 |access-date=14 April 2020 |archive-url=https://web.archive.org/web/20180925230213/https://hackaday.com/2011/12/21/numitron-tube-tutorial/ |archive-date=25 September 2018 |url-status=live}}</ref><ref>{{Cite web |url=http://www.decadecounter.com/vta/tubepage.php?item=10 |title=Incandescent Displays – the Vintage Technology Association |access-date=14 April 2020 |archive-url=https://web.archive.org/web/20180217005226/http://www.decadecounter.com/vta/tubepage.php?item=10 |archive-date=17 February 2018 |url-status=live}}</ref> There were also segment displays that used small incandescent light bulbs instead of LEDs or incandescent filaments. These worked similarly to modern LED segment displays.<ref>{{Cite web |url=http://www.industrialalchemy.org/articleview.php?item=845 |title=Alco MSM-5A Mosaic Indicator Incandescent Display - Industrial Alchemy |website=www.industrialalchemy.org}}</ref>

[[Engineering:Vacuum fluorescent display|Vacuum fluorescent display]] versions were also used in the 1970s.<ref>{{Cite web |url=http://www.decadecounter.com/vta/articleview.php?item=94 |title=General Electric Y1938 – the Vintage Technology Association |access-date=13 November 2020 |archive-url=https://web.archive.org/web/20160611100808/http://www.decadecounter.com/vta/articleview.php?item=94 |archive-date=11 June 2016 |url-status=live}}</ref>

Many early (c. 1970s) LED seven-segment displays had each digit built on a single [[Engineering:Die (integrated circuit)|die]]. This made the digits very small. Some included magnifying lenses in the design to try to make the digits more legible.<ref>{{Cite web |url=http://www.industrialalchemy.org/articleview.php?item=3081 |title=Litronix Surface Mount Wristwatch LED Display – Industrial Alchemy |access-date=16 April 2020 |archive-url=https://web.archive.org/web/20180831152511/http://industrialalchemy.org/articleview.php?item=3081 |archive-date=31 August 2018 |url-status=live}}</ref><ref>{{Cite web |url=http://www.industrialalchemy.org/articleview.php?item=787 |title=Litronix DL330 Series LED Displays (Siemens DL340M) - Industrial Alchemy |access-date=16 April 2020 |archive-url=https://web.archive.org/web/20180304050126/http://www.industrialalchemy.org/articleview.php?item=787 |archive-date=4 March 2018 |url-status=live}}</ref> Other designs used 1 or 2 dies for every segment of the display.<ref>https://www.industrialalchemy.org/articleview.php?item=1167</ref><ref>https://www.industrialalchemy.org/articleview.php?item=773</ref>

The seven-segment pattern is sometimes used in posters or tags, where the user either applies color to pre-printed segments, or applies color through a seven-segment digit template, to compose figures such as product prices or telephone numbers.

For many applications, dot-matrix [[Engineering:Liquid-crystal display|liquid-crystal display]]s (LCDs) have largely superseded LED displays in general, though even in LCDs, seven-segment displays are common. Unlike LEDs, the shapes of elements in an LCD panel are arbitrary since they are formed on the display by [[Engineering:Photolithography|photolithography]]. In contrast, the shapes of LED segments tend to be simple [[Rectangle|rectangle]]s, because they have to be physically moulded to shape, which makes it difficult to form more complex shapes than the segments of seven-segment displays. However, the easy recognition of seven-segment displays, and the comparatively high visual [[Contrast (vision)|contrast]] obtained by such displays relative to dot-matrix digits, makes seven-segment multiple-digit LCD screens very common on basic [[Engineering:Calculator|calculator]]s.

The seven-segment display has inspired type designers to produce typefaces reminiscent of that display (but more legible), such as [[New Alphabet]], "DB LCD Temp", "ION B", etc.

Using a restricted range of letters that look like (upside-down) digits, seven-segment displays are commonly used by school children to form words and phrases using a technique known as "calculator spelling".

== Implementations ==
[[File:Fuel_prices.jpg|thumb|left|A vane display at a gas station]]
[[File:LED Digital Display.jpg|thumb|right|A [[Engineering:Multiplexing|multiplexed]] 4-digit, seven-segment display with only 12 pins]]
[[File:7segment multiplexing.gif|thumb|right|A 4-digit display scanning by columns to make the number 1.234]]
[[File:8-digit-multiplex-7-segment-LED-X-Ray.tif|thumb|alt=Eight small rectangular blobs, which are the digits, connected by fine hair-like wires to tracks along a circuit board|X-Ray of an 8-digit 7-segment multiplexed LED display from a 1970s calculator]]

Seven-segment displays may use a liquid crystal display (LCD), a [[Engineering:Light-emitting diode|light-emitting diode]] (LED) for each segment, an [[Physics:Electrochromic devices#EC display|electrochromic display]], or other light-generating or controlling techniques such as [[Physics:Cold cathode|cold cathode]] gas discharge (Panaplex), [[Engineering:Vacuum fluorescent display|vacuum fluorescent]] (VFD), incandescent filaments (Numitron), and others. For [[Chemistry:Gasoline|gasoline]] price totems and other large signs, [[Engineering:Vane display|vane display]]s made up of electromagnetically flipped light-reflecting segments (or "vanes") are still commonly used. A precursor to the 7-segment display in the 1950s through the 1970s was the cold-cathode, neon-lamp-like [[Engineering:Nixie tube|nixie tube]]. Starting in 1970, [[Company:RCA|RCA]] sold a display device known as the ''{{Visible anchor|Numitron}}'' that used incandescent filaments arranged into a seven-segment display.<ref name="Numintron 1974">{{cite journal |date=1974-06-07 |title=Advert for RCA NUMITRON Display Devices |journal=Electronic Design |publisher=Hayden |volume=22 |issue=12 |page=163 |url=http://commons.wikimedia.org/wiki/File:RCA_Numitron_display_device_June_1974.jpg |access-date=22 June 2012 |archive-url=https://web.archive.org/web/20140331112707/http://commons.wikimedia.org/wiki/File:RCA_Numitron_display_device_June_1974.jpg |archive-date=31 March 2014 |url-status=live}}</ref> In USSR, the first electronic calculator "Vega", which was produced from 1964, contains 20 decimal digits with seven-segment [[Physics:Electroluminescent display|electroluminescent display]].<ref>{{Cite web |url=http://www.taswegian.com/MOSCOW/vega.html |title=Museum of Soviet Calculators - VEGA |date=29 September 2010 |archive-url=https://web.archive.org/web/20100929142141/http://www.taswegian.com/MOSCOW/vega.html |archive-date=29 September 2010}}</ref>

In a simple LED package, typically all of the [[Physics:Cathode|cathode]]s (negative terminals) or all of the [[Physics:Anode|anode]]s (positive terminals) of the segment LEDs are connected and brought out to a common pin; this is referred to as a "common cathode" or "common anode" device.<ref name="Westermann_Tabellen"/> Hence a 7 segment plus decimal point package will only require nine pins, though commercial products typically contain more pins, and/or spaces where pins would go, in order to match standard [[Engineering:Integrated circuit|IC]] sockets. Integrated displays also exist, with single or multiple digits. Some of these integrated displays incorporate their own internal [[Engineering:Binary decoder|decoder]], though most do not: each individual LED is brought out to a connecting pin as described.

Multiple-digit LED displays as used in pocket calculators and similar devices used [[Engineering:Multiplexed display|multiplexed display]]s to reduce the number of I/O pins required to control the display. For example, all the anodes of the A segments of each digit position would be connected together and to a [[Engineering:Driver circuit|driver circuit]] pin, while the cathodes of all segments for each digit would be connected. To operate any particular segment of any digit, the controlling integrated circuit would turn on the cathode driver for the selected digit, and the anode drivers for the desired segments; then after a short blanking interval the next digit would be selected and new segments lit, in a sequential fashion. In this manner an eight digit display with seven segments and a decimal point would require only 8 cathode drivers and 8 anode drivers, instead of sixty-four drivers and IC pins.<ref>e.g. [http://pdf1.alldatasheet.com/datasheet-pdf/view/170106/VISHAY/TDCR1050M.html DCR 1050m] {{Webarchive|url=https://web.archive.org/web/20140331105445/http://pdf1.alldatasheet.com/datasheet-pdf/view/170106/VISHAY/TDCR1050M.html |date=31 March 2014}}</ref> Often in pocket calculators the digit drive lines would be used to scan the keyboard as well, providing further savings; however, pressing multiple keys at once would produce odd results on the multiplexed display.

Although to a naked eye all digits of an LED display appear lit, only one digit is lit at any given time in a multiplexed display. The digit changes at a high enough rate that the human eye cannot see the flashing (on earlier devices it could be visible to peripheral vision).

==Characters==
{{Main|Seven-segment display character representations}}
{{importance section|date=October 2023}}
[[File:7 Segment Display with Labeled Segments.svg|thumb|150px|Segment names of a seven-segment display with an eighth Decimal Point segment.]]
The seven segments are arranged as a rectangle, with two vertical segments on each side and one horizontal segment each at the top, middle, and bottom. Often the rectangle is ''oblique'' (slanted), which may aid readability. In most applications, the segments are of nearly uniform shape and size (usually elongated [[Hexagon|hexagon]]s, though [[Trapezoid|trapezoid]]s and [[Rectangle|rectangle]]s can also be used); though in the case of [[Engineering:Adding machine|adding machine]]s, the vertical segments are longer and more oddly shaped at the ends, to try to make them more easily readable. The seven elements of the display can be lit in different combinations to represent each of the [[Arabic numerals]].

The individual segments are referred to by the letters "a" to "g", and an optional decimal point (an "eighth segment", referred to as DP) is sometimes used for the display of non-integer numbers.<ref>{{cite web |url=http://www.sentex.ca/~mec1995/tutorial/7seg/7seg.html |title=Seven Segment Displays |access-date=2012-11-14 |url-status=dead |archive-url=https://web.archive.org/web/20120105025754/http://www.sentex.ca/~mec1995//tutorial/7seg/7seg.html |archive-date=2012-01-05}}</ref><ref name="Westermann_Tabellen">{{cite book |date=1999 |title=Elektrotechnik Tabellen Kommunikationselektronik |edition=3rd |publisher=Westermann Verlag |location=Braunschweig, Germany |isbn=3142250379 |page=110}}</ref> A single byte can encode the full state of a seven-segment display, including the decimal point. The most popular bit encodings are ''gfedcba'' and ''abcdefg''. In the ''gfedcba'' representation, a byte value of 0x06 would turn on segments "c" and "b", which would display a "1".

[[File:7-segment.svg|thumb|16×8 grid showing the 128 states of a seven-segment display<ref name="elektor-UK_1981-72"/>]]

===Decimal===
The [[Numerical digit|numerical digit]]s 0 to 9 are the most common characters displayed on seven-segment displays. The most common patterns used for each of these are:<ref name="Nührmann_1991">{{cite book |title=Werkbuch Elektronik |language=de |author-first=Dieter |author-last=Nührmann |publisher=Franzis-Verlag GmbH |publication-place=Munich, Germany |location=Achim, Bremen, Germany |date=1981 |edition=3 |isbn=3-7723-6543-4 |page=695}}</ref>

:{{7seg|0|10px|abcdef}} {{7seg|1|10px|bc}} {{7seg|2|10px|abdeg}} {{7seg|3|10px|abcdg}} {{7seg|4|10px|bcfg}} {{7seg|5|10px|acdfg}} {{7seg|6|10px|acdefg}} {{7seg|7|10px|abc}} {{7seg|8|10px|abcdefg}} {{7seg|9|10px|abcdfg}}

Alternative patterns: The numeral 1 may be represented with the left segments, the numerals 6 and 9 may be represented without a "tail", and the numeral 7 represented ''with'' a 'tail':<ref name="Casio fx-50F calculator">For example the fx-50F calculator from [[Company:Casio|Casio]] and other models from the same manufacturer.</ref>

:{{7seg|1*|10px|ef}} {{7seg|6|10px|cdefg}} {{7seg|7|10px|abcf}} {{7seg|9|10px|abcfg}}

In Unicode 13.0, 10 codepoints had been given for segmented digits 0–9 in the [[Symbols for Legacy Computing]] block, to replicate early computer fonts that included seven-segment versions of the digits.<ref>[https://www.unicode.org/charts/PDF/U1FB00.pdf Official Unicode Consortium code chart] (PDF)</ref> The official reference shows the less-common four-segment "7". The characters as displayed by your browser:

{| class="wikitable nounderlines" style="background:white"
! !! 0 !! 1 !! 2 !! 3 !! 4 !! 5 !! 6 !! 7 !! 8 !! 9
|-
! {{mono|U+1FBFx}}
| title="U+1FBF0: SEGMENTED DIGIT ZERO" |🯰
| title="U+1FBF1: SEGMENTED DIGIT ONE" |🯱
| title="U+1FBF2: SEGMENTED DIGIT TWO" |🯲
| title="U+1FBF3: SEGMENTED DIGIT THREE" |🯳
| title="U+1FBF4: SEGMENTED DIGIT FOUR" |🯴
| title="U+1FBF5: SEGMENTED DIGIT FIVE" |🯵
| title="U+1FBF6: SEGMENTED DIGIT SIX" |🯶
| title="U+1FBF7: SEGMENTED DIGIT SEVEN" |🯷
| title="U+1FBF8: SEGMENTED DIGIT EIGHT" |🯸
| title="U+1FBF9: SEGMENTED DIGIT NINE" |🯹
|}

===Hexadecimal===
Four binary bits are needed to specify the numbers 0–9, but can also specify 10–15, so usually decoders with 4 bit inputs can also display [[Hexadecimal|hexadecimal]] (hex) digits. Today, a combination of uppercase and lowercase letters is commonly used for A–F;<ref name="Maxim_2008_MAX6955">{{cite web |title=Application Note 3210 – Quick-Start: Driving 7-Segment Displays with the MAX6954 |publisher=Maxim Integrated |orig-year=2004-06-25 |edition=3 |date=March 2008 |url=http://datasheets.maximintegrated.com/en/ds/MAX6955.pdf |type=Application note |access-date=2013-05-06 |url-status=live|archive-url=https://web.archive.org/web/20170320002007/https://datasheets.maximintegrated.com/en/ds/MAX6955.pdf |archive-date=2017-03-20}}</ref> this is done to obtain a unique, unambiguous shape for each hexadecimal digit (otherwise, a capital "D" would look identical to a '0' and a capital&nbsp;'B' would look identical to an&nbsp;'8').<ref name="Maxim">{{cite web |publisher=Maxim Integrated |title=Driving 7-Segment Displays |date=2004 |url=http://www.maximintegrated.com/app-notes/index.mvp/id/3210 |access-date=2017-03-20 |url-status=live |archive-url=https://web.archive.org/web/20170320000854/https://www.maximintegrated.com/en/app-notes/index.mvp/id/3210 |archive-date=2017-03-20}}</ref><ref name="TI_1974_SR-22">{{cite book |title=electronic hexadecimal calculator/converter SR-22 |publisher=Texas Instruments Incorporated |date=1974 |page=7 |edition=Revision A |id=1304-389 Rev A |url=http://www.datamath.net/Manuals/SR-22_US.pdf |access-date=2017-03-20 |url-status=live |archive-url=https://web.archive.org/web/20170320001329/http://www.datamath.net/Manuals/SR-22_US.pdf |archive-date=2017-03-20}}</ref><ref name="TI_1977_Programmer">{{cite book |title=electronic calculator – TI programmer |publisher=Texas Instruments Incorporated |date=1977 |page=7 |url=http://www.datamath.net/Manuals/TI-Programmer_US.pdf |access-date=2017-03-28 |url-status=live |archive-url=https://web.archive.org/web/20170328231050/http://www.datamath.net/Manuals/TI-Programmer_US.pdf |archive-date=2017-03-28}}</ref><ref name="TI_1981_LCD_Programmer">{{cite book |title=electronic calculator – TI LCD programmer |publisher=Texas Instruments Incorporated |date=1981 |page=8 |url=http://www.datamath.net/Manuals/LCD-Programmer_US.pdf |access-date=2017-03-28 |url-status=live |archive-url=https://web.archive.org/web/20170328231558/http://www.datamath.net/Manuals/LCD-Programmer_US.pdf |archive-date=2017-03-28}}</ref> Also the digit&nbsp;'6' must be displayed with the top bar lit to avoid ambiguity with the letter&nbsp;'b'.

:{{7seg|A|10px}} {{7seg|b|10px}} {{7seg|C|10px}} {{7seg|d|10px}} {{7seg|E|10px}} {{7seg|F|10px}}

===Letters===
Most letters of the Latin alphabet can be reasonably implemented using seven segments.  Though not every letter is available, it is possible to create many useful words.  By careful choice of words, one can sometimes work around many shortcomings of seven-segment alphabet encodings.

{| class="wikitable" style="text-align:center;background:#FFF"
|+ Latin alphabet
! !! A !! B !! C !! D !! E !! F !! G !! H !! I !! J !! K !! L !! M !! N !! O !! P !! Q !! R !! S !! T !! U !! V !! W !! X !! Y !! Z
|-
! Upper
| {{7seg|А|10px}} || || {{7seg|C|10px}} || || {{7seg|E|10px}} || {{7seg|F|10px}} || {{7seg|G|10px}} || {{7seg|H|10px}} || style="background: #FEE|{{7seg|I*|10px}} || {{7seg|J*|10px}} || || {{7seg|L|10px}} || || || style="background: #FEE|{{7seg|O|10px}} || {{7seg|P|10px}} || || || style="background: #FEE|{{7seg|S|10px}} || {{7seg|T|10px}} || {{7seg|U|10px}} || || || || || style="background: #FEE|{{7seg|Z|10px}}
|-
! Lower
| {{7seg|a*|10px}} || {{7seg|b|10px}} || {{7seg|c|10px}} || {{7seg|d|10px}} || {{7seg|e|10px|abdefg}} || || style="background: #FEE|{{7seg|g*|10px}} || {{7seg|h|10px}} || {{7seg|i#|10px}} || {{7seg|j|10px|bcd}} || || {{7seg|l|10px}} || || {{7seg|n|10px}} || {{7seg|o|10px}} || || {{7seg|q|10px}} || {{7seg|r|10px}} || || {{7seg|t|10px}} || {{7seg|u|10px}} || || || || {{7seg|y|10px}} ||
|}
{{legend|#FEE|Ambiguous with a digit. Upper case {{serif|I}} could be put on the left (as lower-case L is shown here) but this is not often done. Lowercase 'b' and 'q' are identical to the alternate numerical digits '6' and '9'.}}

Short messages giving status information (e.g. "{{7seg|n|10px}}{{7seg|o|10px}}{{7seg|sp|10px}}{{7seg|d|10px}}{{7seg|1|10px}}{{7seg|S|10px}}{{7seg|C|10px}}" on a CD player) are also commonly represented on seven-segment displays. In the case of such messages it is not necessary for every letter to be unambiguous, merely for the words as a whole to be readable.

Examples:
:{{7seg|O|10px}}{{7seg|P|10px}}{{7seg|E|10px}}{{7seg|n|10px}}, {{7seg|C|10px}}{{7seg|L|10px}}{{7seg|O|10px}}{{7seg|S|10px}}{{7seg|E|10px}}, {{7seg|P|10px}}{{7seg|L|10px}}{{7seg|A|10px}}{{7seg|y|10px}}, {{7seg|P|10px}}{{7seg|A|10px}}{{7seg|U|10px}}{{7seg|S|10px}}{{7seg|E|10px}}, {{7seg|S|10px}}{{7seg|H|10px}}{{7seg|U|10px}}{{7seg|F|10px}}{{7seg|F|10px}}{{7seg|L|10px}}{{7seg|E|10px}}, {{7seg|n|10px}}{{7seg|o|10px}} {{7seg|d|10px}}{{7seg|I|10px|bc}}{{7seg|S|10px}}{{7seg|C|10px}}

:{{7seg|S|10px}}{{7seg|t|10px}}{{7seg|A|10px}}{{7seg|r|10px}}{{7seg|t|10px}}, {{7seg|S|10px}}{{7seg|t|10px}}{{7seg|o|10px}}{{7seg|P|10px}}, {{7seg|r|10px}}{{7seg|u|10px}}{{7seg|n|10px}}, {{7seg|F|10px}}{{7seg|A|10px}}{{7seg|I|10px|bc}}{{7seg|L|10px}}, {{7seg|E|10px}}{{7seg|r|10px}}{{7seg|r|10px}}{{7seg|o|10px}}{{7seg|r|10px}}, {{7seg|S|10px}}{{7seg|E|10px}}{{7seg|t|10px}}{{7seg|U|10px}}{{7seg|P|10px}}, {{7seg|H|10px}}{{7seg|E|10px}}{{7seg|L|10px}}{{7seg|P|10px}}

:{{7seg|o|10px}}{{7seg|n|10px}}, {{7seg|O|10px}}{{7seg|F|10px}}{{7seg|F|10px}}, {{7seg|y|10px}}{{7seg|E|10px}}{{7seg|S|10px}}, {{7seg|n|10px}}{{7seg|o|10px}}, {{7seg|H|10px}}{{7seg|o|10px}}{{7seg|t|10px}}, {{7seg|C|10px}}{{7seg|o|10px}}{{7seg|L|10px}}{{7seg|d|10px}}

Seven-segment displays have also been used to show letters of the [[Social:Cyrillic script|Cyrillic]] and Greek alphabets:

{| class="wikitable" style="text-align:center;background:#FFF"
|+ Cyrillic alphabet
! !! А !! Б !! В !! Г !! Д !! Е !! Ё !! Ж !! З !! И !! Й !! К !! Л !! М !! Н !! О !! П !! Р !! С !! Т !! У !! Ф !! Х !! Ц !! Ч !! Ш !! Щ !! Ъ !! Ы !! Ь !! Э !! Ю !! Я
|-
! Upper
| {{7seg|А|10px}} || style="background: #FEE|{{7seg|Б|10px}} || style="background: #FEE|{{7seg|В|10px}} || {{7seg|Г|10px}} || || {{7seg|Е|10px}} || || || style="background: #FEE|{{7seg|З|10px}} || || || || || || {{7seg|Н|10px}} || style="background: #FEE|{{7seg|О|10px}} || {{7seg|П|10px}} || {{7seg|Р|10px}} || {{7seg|С|10px}} || || {{7seg|У|10px}} || || || || style="background: #FEE|{{7seg|Ч|10px}} || || || || {{7seg|Ы|10px|cdefg}}{{7seg|Ы|10px|ef}} || {{7seg|Ь|10px}} || style="background: #FEE|{{7seg|Э|10px}} || ||
|-
! Lower
| || || || {{7seg|г|10px}} || {{7seg|д|10px}} || || || || || {{7seg|и|10px}} || {{7seg|й|10px}} || || || || || {{7seg|о|10px}} || {{7seg|п|10px}} || || {{7seg|с|10px}} || || || || || || || || || || || || || ||
|}
{{Legend|#FEE|Ambiguous with a digit.}}
{| class="wikitable" style="text-align:center;background:#FFF"
|+ Greek alphabet
! !! Α !! Β !! Γ !! Δ !! Ε !! Ζ !! Η !! Θ !! Ι !! Κ !! Λ !! Μ !! Ν !! Ξ !! Ο !! Π !! Ρ !! Σ !! Τ !! Υ !! Φ !! Χ !! Ψ !! Ω
|-
! Upper
| {{7seg|Α|10px}} ||  style="background: #FEE|{{7seg|Β|10px}} || {{7seg|Γ|10px}} || || {{7seg|Ε|10px}} || style="background: #FEE|{{7seg|Ζ|10px}} || {{7seg|Η|10px}} || style="background: #FEE|{{7seg|Θ|10px}} || style="background: #FEE|{{7seg|Ι|10px}} ||  || || || || {{7seg|Ξ|10px}} || style="background: #FEE|{{7seg|Ο|10px}} || {{7seg|Π|10px}} || {{7seg|Ρ|10px}} || {{7seg|Σ|10px}} || || style="background: #FEE|{{7seg|Υ|10px}} || || ||  || {{7seg|Ω|10px}}
|-
! Lower
| || || || style="background: #FEE|{{7seg|δ|10px}} || || || || || {{7seg|ι|10px}} || || {{7seg|λ|10px}} || {{7seg|μ|10px}} || || || {{7seg|ο|10px}} || {{7seg|π|10px}} || || || {{7seg|τ|10px}} || {{7seg|υ|10px}} || || || ||
|}
{{Legend|#FEE|Ambiguous with a digit.}}
There are enough patterns to show all the letters but few representations are unambiguous and intuitive at the same time.<ref>{{cite book |author-last=Downie |author-first=Neil A. |date=2003 |title=Ink Sandwiches, Electric Worms and 37 Other Experiments for Saturday Science |publisher=Johns Hopkins University Press |url=https://archive.org/details/inksandwichesele0000down |url-access=registration |page=[https://archive.org/details/inksandwichesele0000down/page/271 271]}}</ref> When all letters need to be displayed on a device, [[Engineering:Sixteen-segment display|sixteen-segment]] and dot matrix displays are better choices than seven-segment displays.

===Punctuation===
Seven segments are capable of displaying some punctuation glyph characters.

{| class="wikitable"
|+ Punctuation encodings
|-
! Glyph !! Display !! [[Unicode]] !! Meaning
|-
| {{sp}}  || {{7seg| sp |10px|none}} || 0x0020 || Space
|-
| _       || {{7seg| _ |10px|d}}     || 0x005F || Underscore
|-
| -       || {{7seg| - |10px|g}}     || 0x002D || [[Plus and minus signs#Minus sign|Minus]], Negative, Hyphen, Dash
|-
| ‾       || {{7seg| ‾ |10px|a}}     || 0x203E || Overscore, Macron
|-
| =       || {{7seg| eq |10px|dg}}   || 0x003D || [[Equals sign|Equals]]
|-
| <sup>=</sup> || {{7seg| ⁼ |10px|ag}}    || 0x207C || Superscript [[Equals sign|equals]]
|-
| ≡       || {{7seg| ≡ |10px|adg}}   || 0x2261 || [[Triple bar|Triple bar, Identical to]], [[Hamburger button]]
|-
| °       || {{7seg| ° |10px|abfg}}  || 0x00B0 || [[Degree symbol|Degree]]
|-
| "       || {{7seg| " |10px|bf}}    || 0x0022 || Double quote, [[Prime (symbol)|Double prime]]
|-
| '       || {{7seg| ' |10px|f}}     || 0x0027 || Apostrophe, Single quote, [[Prime (symbol)|Prime]]
|-
| ( or [  || {{7seg| [ |10px|adef}}  || 0x005B || [[Bracket|Parenthesis, Bracket]] (conflicts with uppercase C)
|-
| ) or ]  || {{7seg| ] |10px|abcd}}  || 0x005D || Parenthesis, Bracket
|-
| <       || {{7seg| < |10px|afg}}   || 0x003C || [[Less-than sign|Less than]]
|-
| >       || {{7seg| > |10px|abg}}   || 0x003E || [[Greater-than sign|Greater than]]
|-
| ?       || {{7seg| ? |10px|abeg}}  || 0x003F || Question mark
|}
The decimal point can be used to add a period after a letter.

==Decoder ICs==
In the past, some seven-segment decoder [[Engineering:Integrated circuit|ICs]] did not output the following modern decimal/hexadecimal font.
:{|
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| {{7seg|A|10px|abcefg}}
| {{7seg|b|10px|cdefg}}
| {{7seg|C|10px|adef}}
| {{7seg|d|10px|bcdeg}}
| {{7seg|E|10px|adefg}}
| {{7seg|F|10px|aefg}}
|}

* For "1", the MC14558B displays the number on the left side of the display using segments "e" and "f" instead of the usual "b" and "c".<ref name="Motorola_MC14558B_Datasheet"/>
* For "7", the TC5022 displays it with additional segment "f".<ref name="Toshiba_TC5002_Datasheet"/>
* For "6" and "9", the CD4511B, MC14558B, TC5002, SN74x46/SN74x47/SN74x48/SN74x49 displays both numbers without a "tail", where "x" is the [[Engineering:7400-series integrated circuits#Families|TTL logic family]].
* For "A" to "F":
:* BCD decoder ICs support various seven-segment fonts for their decoded output of "A" (10) to "F" (15) inputs.
:* The 7446/7447/7448/7449<ref name="TI_SN74LS47_Datasheet"/> and the [[Company:Siemens|Siemens]] FLH551-7448/555-8448 chips used truncated versions of "2", "3", "4", "5" and "6" for digits A–E. Digit F (1111 binary) was blank.<ref name="Beuth_1990">{{cite book |title=Digitaltechnik |author-first1=Klaus |author-last1=Beuth |author-first2=Annette |author-last2=Beuth |language=de |work=Elektronik |volume=4 |publisher={{ill|Vogel Buchverlag|de}} |location=Würzburg, Germany |date=1990 |edition=7 |isbn=3-8023-0584-1 |pages=301–303}}</ref><ref name="Siemens_FLH">{{cite book |title=Datenblatt FLH551-7448, FLH555-8448, 74248 |publisher=[[Company:Siemens|Siemens]] |language=de<!-- |date=unknown, but must be before 1990 -->}}</ref>
:* The TC5002 and TC5022 repeat the numbers 0 to 5 for digits A–F.<ref name="Toshiba_TC5002_Datasheet"/>
:* The MM74C912 displayed "o" for A and B, "−" for C, D and E, and blank for F.<ref name="National_MM74C912_Datasheet"/> The CD4511B just displayed blanks.<ref name="TI_CD4511B_Datasheet"/> 
:* Soviet [[Engineering:Programmable calculator|programmable calculator]]s like the Б3–34 used the symbols "−", "L", "C", "Г", "E", and " " (space), allowing the error message EГГ0Г to be displayed.

:{| class="wikitable nounderlines" style="text-align: center;"
|-
! Manufacturer || Part Number || Production || Description || [[Binary-coded decimal|0]] || 1 || 2 || 3 || 4 || 5 || 6 || 7 || 8 || [[Binary-coded decimal|9]] || [[Hexadecimal|A]] || B || C || D || E || [[Hexadecimal|F]] || Output || Datasheet

|-
| [[Company:RCA|RCA]]
| CD4026B
| {{Yes|[https://www.ti.com/product/CD4026B Active (TI)]}}
| [[Binary-coded decimal|BCD]] [[Counter (digital)|Counter]], Up
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| Active-High
| <ref name="TI_CD4026B_Datasheet">{{cite web |title=CD4026B / CD4033B Datasheet |url=https://www.ti.com/lit/gpn/cd4026b |date=December 2020 |website=[[Company:Texas Instruments|Texas Instruments]] |archive-url=https://web.archive.org/web/20210801181048/https://www.ti.com/lit/ds/symlink/cd4026b.pdf?ts=1627841448399 |archive-date=August 1, 2021 |url-status=live}}</ref>

|-
| RCA
| CD4033B
| {{Yes|[https://www.ti.com/product/CD4033B Active (TI)]}}
| BCD Counter, Up
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| Active-High
| <ref name="TI_CD4026B_Datasheet"/>

|-
| RCA
| CD40110B
| {{Yes|[https://www.ti.com/product/CD40110B Active (TI)]}}
| BCD Counter, Up/Down
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| style="background-color:#CCCCCC;" | {{sp}}
| Active-High
| <ref name="TI_CD40110B_Datasheet">{{cite web |title=CD40110B Datasheet |url=https://www.ti.com/lit/gpn/cd40110b |date=March 2021 |website=[[Company:Texas Instruments|Texas Instruments]] |archive-url=https://web.archive.org/web/20210801181952/https://www.ti.com/lit/ds/symlink/cd40110b.pdf?ts=1627783345025+ |archive-date=August 1, 2021 |url-status=live}}</ref>

|-
| RCA<br>TI
| CD4511B<br>CD74x4511
| {{Yes|[https://www.ti.com/product/CD4511B Active (TI)]}}
| BCD Decoder, [[Engineering:Flip-flop (electronics)|Latch]]
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|cdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcfg}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| Active-High
| <ref name="TI_CD4511B_Datasheet">{{cite web |title=CD4511B Datasheet |url=https://www.ti.com/lit/gpn/cd4511b |date=February 2021 |website=[[Company:Texas Instruments|Texas Instruments]] |archive-url=https://web.archive.org/web/20210801182348/https://www.ti.com/lit/ds/symlink/cd4511b.pdf?ts=1627842227899 |archive-date=August 1, 2021 |url-status=live}}</ref><ref name="TI_CD74HC4511_Datasheet">{{cite web |title=CD74HC4511 Datasheet |url=https://www.ti.com/lit/ds/symlink/cd74hc4511.pdf?ts=1693998795416 |date=August 2022 |website=[[Company:Texas Instruments|Texas Instruments]] |archive-url=https://web.archive.org/web/20230906215737/https://www.ti.com/lit/ds/symlink/cd74hc4511.pdf?ts=1693998795416 |archive-date=September 6, 2023 |url-status=live}}</ref>

|-
| RCA<br>TI
| CD4543B<br>CD74x4543
| {{Yes|[https://www.ti.com/product/CD4543B Active (TI)]}}
| BCD Decoder, Latch
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| Active-High or Low
| <ref name="TI_CD4543B_Datasheet">{{cite web |title=CD4543B Datasheet |url=https://www.ti.com/lit/gpn/cd4543b |date=July 2021 |website=[[Company:Texas Instruments|Texas Instruments]] |archive-url=https://web.archive.org/web/20210801183115/https://www.ti.com/lit/ds/symlink/cd4543b.pdf?ts=1627774226535 |archive-date=August 1, 2021 |url-status=live}}</ref><ref name="TI_CD74HC4543_Datasheet">{{cite web |title=CD74HC4543 Datasheet |url=https://www.ti.com/lit/ds/symlink/cd74hc4543.pdf?ts=1693999287921 |date=July 2003 |website=[[Company:Texas Instruments|Texas Instruments]] |archive-url=https://web.archive.org/web/20230906215807/https://www.ti.com/lit/ds/symlink/cd74hc4543.pdf?ts=1693999287921 |archive-date=September 6, 2023 |url-status=live}}</ref>

|-
| [[Company:Motorola|Motorola]]
| MC14495-1
| {{No|Discontinued}}
| [[Hexadecimal|Hex]] Decoder, Latch
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| {{7seg|A|10px|abcefg}}
| {{7seg|b|10px|cdefg}}
| {{7seg|C|10px|adef}}
| {{7seg|d|10px|bcdeg}}
| {{7seg|E|10px|adefg}}
| {{7seg|F|10px|aefg}}
| Active-High, 290Ω
| <ref name="Motorola_MC14495-1_Datasheet">{{cite web |title=MC14495-1 Datasheet from CMOS / NMOS Special Functions Databook |url=https://archive.org/details/bitsavers_motoroladaCMOSNMOSSpecialFunctions_20767931/page/n79/mode/2up |date=1988 |website=[[Company:Motorola|Motorola]]}}</ref>

|-
| Motorola
| MC14558B
| {{No|Discontinued}}
| BCD Decoder
| {{7seg|0|10px|abcdef}}
| {{7seg|1*|10px|ef}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|cdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcfg}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| {{7seg|sp|10px|none}}
| Active-High
| <ref name="Motorola_MC14558B_Datasheet">{{cite web |title=MC14558B Datasheet from CMOS Logic Databook |url=https://archive.org/details/bitsavers_motoroladaCMOSLogicData_31567161/page/n455/mode/2up |date=1988 |website=[[Company:Motorola|Motorola]]}}</ref>

|-
| [[Company:Texas Instruments|TI]]
| SN74LS47
| {{Yes|[https://www.ti.com/product/SN74LS47 Active]}}
| BCD Decoder
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|cdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcfg}}
| {{7seg|c|10px|deg}}
| {{7seg|a|10px|cdg}}
| {{7seg|v*|10px|bfg}}
| {{7seg|D|10px|adfg}}
| {{7seg|t|10px|defg}}
| {{7seg|sp|10px|none}}
| Active-Low
| <ref name="TI_SN74LS47_Datasheet">{{cite web |title=SN74LS47 / SN74LS48 / SN74LS49 Datasheet |url=https://www.ti.com/lit/gpn/sn74ls47 |date=July 2021 |website=[[Company:Texas Instruments|Texas Instruments]] |archive-url=https://web.archive.org/web/20210801175713/https://www.ti.com/lit/ds/symlink/sn74ls47.pdf?ts=1627840632865 |archive-date=August 1, 2021 |url-status=live}}</ref>

|-
| TI
| SN74LS247
| {{Yes|[https://www.ti.com/product/SN74LS247 Active]}}
| BCD Decoder
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| {{7seg|c|10px|deg}}
| {{7seg|a|10px|cdg}}
| {{7seg|v*|10px|bfg}}
| {{7seg|D|10px|adfg}}
| {{7seg|t|10px|defg}}
| {{7seg|sp|10px|none}}
| Active-Low
| <ref name="TI_SN74LS247_Datasheet">{{cite web |title=SN74LS247 / SN74LS248 Datasheet |url=https://www.ti.com/lit/gpn/sn74ls247 |date=July 2021 |website=[[Company:Texas Instruments|Texas Instruments]] |archive-url=https://web.archive.org/web/20210801180315/https://www.ti.com/lit/ds/symlink/sn74ls247.pdf?ts=1627840995104 |archive-date=August 1, 2021 |url-status=live}}</ref>

|-
| [[Company:Toshiba|Toshiba]]
| TC5002
| {{No|Discontinued}}
| BCD Decoder
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|cdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcfg}}
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| Active-High
| <ref name="Toshiba_TC5002_Datasheet">{{cite web |title=TC5002 / TC5022 Datasheet from C<sup>2</sup>MOS Databook |url=https://archive.org/details/bitsavers_toshibadatOSIntegratedCircuits_29343628/page/449/mode/2up |date=1985 |website=[[Company:Toshiba|Toshiba]]}}</ref>

|-
| Toshiba
| TC5022
| {{No|Discontinued}}
| BCD Decoder
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abcf}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| Active-High
| <ref name="Toshiba_TC5002_Datasheet"/>

|-
| [[Company:National Semiconductor|National]]
| MM74C912
| {{No|Discontinued}}
| 6-Digit BCD Controller
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| {{7seg|o|10px|cdeg}}
| {{7seg|°|10px|abfg}}
| {{7seg|‾|10px|a}}
| {{7seg|-|10px|g}}
| {{7seg|_|10px|d}}
| {{7seg|sp|10px|none}}
| Active-High
| <ref name="National_MM74C912_Datasheet">{{cite web |title=MM74C912 / MM74C917 Datasheet from CMOS Logic Databook |url=https://archive.org/details/bitsavers_nationaldaOSLogicDatabook_57445293/page/n1351/mode/2up |date=1988 |website=[[Company:National Semiconductor|National Semiconductor]]}}</ref>

|-
| National
| MM74C917
| {{No|Discontinued}}
| 6-Digit Hex Controller
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| {{7seg|A|10px|abcefg}}
| {{7seg|b|10px|cdefg}}
| {{7seg|C|10px|adef}}
| {{7seg|d|10px|bcdeg}}
| {{7seg|E|10px|adefg}}
| {{7seg|F|10px|aefg}}
| Active-High
| <ref name="National_MM74C912_Datasheet"/>

|-
| National
| DM9368
| {{No|Discontinued}}
| Hex Decoder, Latch
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| {{7seg|A|10px|abcefg}}
| {{7seg|b|10px|cdefg}}
| {{7seg|C|10px|adef}}
| {{7seg|d|10px|bcdeg}}
| {{7seg|E|10px|adefg}}
| {{7seg|F|10px|aefg}}
| Active High, 25mA CC
| <ref name="National_DM9368_Datasheet">{{cite web |title=DM9368 Datasheet from LS/S/TTL Logic Databook |url=https://archive.org/details/bitsavers_nationaldaLSSTTLLogicDatabook_58754412/page/n1069/mode/2up |date=1989 |website=[[Company:National Semiconductor|National Semiconductor]]}}</ref>

|-
| National
| DM9370
| {{No|Discontinued}}
| Hex Decoder, Latch
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| {{7seg|A|10px|abcefg}}
| {{7seg|b|10px|cdefg}}
| {{7seg|C|10px|adef}}
| {{7seg|d|10px|bcdeg}}
| {{7seg|E|10px|adefg}}
| {{7seg|F|10px|aefg}}
| Active Low, OC
| <ref name="National_DM9370_Datasheet">{{cite web |title=DM9370 Datasheet from LS/S/TTL Logic Databook |url=https://archive.org/details/bitsavers_nationaldaLSSTTLLogicDatabook_58754412/page/n1075/mode/2up |date=1989 |website=[[Company:National Semiconductor|National Semiconductor]]}}</ref>

|-
| National
| DM9374
| {{No|Discontinued}}
| BCD Decoder, Latch
| {{7seg|0|10px|abcdef}}
| {{7seg|1|10px|bc}}
| {{7seg|2|10px|abdeg}}
| {{7seg|3|10px|abcdg}}
| {{7seg|4|10px|bcfg}}
| {{7seg|5|10px|acdfg}}
| {{7seg|6|10px|acdefg}}
| {{7seg|7|10px|abc}}
| {{7seg|8|10px|abcdefg}}
| {{7seg|9|10px|abcdfg}}
| {{7seg|-|10px|g}}
| {{7seg|E|10px|adefg}}
| {{7seg|H|10px|bcefg}}
| {{7seg|L|10px|def}}
| {{7seg|P|10px|abefg}}
| {{7seg|sp|10px|none}}
| Active Low, 15mA CC
| <ref name="National_DM9374_Datasheet">{{cite web |title=DM9374 Datasheet from LS/S/TTL Logic Databook |url=https://archive.org/details/bitsavers_nationaldaLSSTTLLogicDatabook_58754412/page/n1081/mode/2up |date=1989 |website=[[Company:National Semiconductor|National Semiconductor]]}}</ref>

|}

: NOTE: the "x" in part numbers means logic family, such as "HC" or "HCT".

==See also==
[[File:Common segment displays.svg|right|thumb|7-, [[Engineering:Nine-segment display|9]]-, 14-, and 16-segment displays shown side by side]]
There are also fourteen- and sixteen-segment displays (for full alphanumerics); however, these have mostly been replaced by [[Dot-matrix display|dot matrix displays]]. 22-segment displays capable of displaying the full [[ASCII]] character set<ref>{{cite web |title=DL-3422 4-digit 22-segment alphanumeric Intelligent Display preliminary data sheet |url=https://archive.org/stream/bitsavers_litronixdaOptoelectronicsCatalog_31011858/1982_Litronix_Optoelectronics_Catalog#page/n81/mode/2up |website=Internet Archive |publisher=Litronix 1982 Optoelectronics Catalog |access-date=2016-09-03 |page=82}}</ref> were briefly available in the early 1980s but did not prove popular.

* [[Engineering:Eight-segment display|Eight-segment display]]
* [[Engineering:Nine-segment display|Nine-segment display]]
* [[Engineering:Fourteen-segment display|Fourteen-segment display]]
* [[Engineering:Sixteen-segment display|Sixteen-segment display]]
* Dot matrix display
* [[Engineering:Nixie tube|Nixie tube]] display
* [[Engineering:Vacuum fluorescent display|Vacuum fluorescent display]]

==References==
{{Reflist|refs=

<ref name="elektor-UK_1981-72">{{cite magazine |title=junior cookbook: a few healthy recipes to keep your computer in shape |author-first1=H. P. |author-last1=Diehl |author-first2=H. D. |author-last2=De Mulder |date=April 1981 |volume=1981 |issue=72 |magazine=elektor (UK) – up-to-date electronics for lab and leisure |language=en |pages=4-28 – 4-31 [4-30 Figure 4] |url=https://worldradiohistory.com/UK/Elektor/80s/Elektor-1981-04.pdf |access-date=2020-07-03 |url-status=live |archive-url=https://web.archive.org/web/20200703164044/https://worldradiohistory.com/UK/Elektor/80s/Elektor-1981-04.pdf |archive-date=2020-07-03}}</ref>

}}

==External links==
{{commons|Seven segment display}}
* [http://www.uize.com/examples/seven-segment-display.html Interactive Demonstration of a Seven Segment Display]
* [http://www.dnatechindia.com/Tutorial/8051-Tutorial/Interfacing-7-Seg-Display-to-Microcontroller.html Interfacing Seven Segment Display to 8051 Microcontroller]
* [http://circuitdigest.com/microcontroller-projects/0-99-counter-using-avr-atmega32 Interfacing 7 Segment Display with AVR Microcontroller]

{{Display technology}}

[[Category:Display technology]]

{{Sourceattribution|Seven-segment display}}