The 7400 series is a popular

logic family In computer engineering, a logic family is one of two related concepts: * A logic family of monolithic digital integrated circuit devices is a group of electronic logic gates constructed using one of several different designs, usually with compati ...

transistor–transistor logic Transistor–transistor logic (TTL) is a logic family built from bipolar junction transistors (BJTs). Its name signifies that transistors perform both the logic function (the first "transistor") and the amplifying function (the second "transistor" ...

(TTL)

integrated circuit An integrated circuit (IC), also known as a microchip or simply chip, is a set of electronic circuits, consisting of various electronic components (such as transistors, resistors, and capacitors) and their interconnections. These components a ...

s (ICs). In 1964,

Texas Instruments Texas Instruments Incorporated (TI) is an American multinational semiconductor company headquartered in Dallas, Texas. It is one of the top 10 semiconductor companies worldwide based on sales volume. The company's focus is on developing analog ...

introduced the SN5400 series of logic chips, in a ceramic

semiconductor package A semiconductor package is a metal, plastic, glass, or ceramic casing containing one or more discrete semiconductor devices or integrated circuits. Individual components are fabricated on semiconductor wafers (commonly silicon) before being dic ...

. A low-cost plastic package SN7400 series was introduced in 1966 which quickly gained over 50% of the logic chip market, and eventually becoming ''de facto'' standardized electronic components. Since the introduction of the original bipolar-transistor TTL parts,

pin-compatible In electronics, pin-compatible devices are electronic components, generally integrated circuits or expansion cards, sharing a common footprint and with the same functions assigned or usable on the same pins. Pin compatibility is a property des ...

parts were introduced with such features as low power

CMOS Complementary metal–oxide–semiconductor (CMOS, pronounced "sea-moss ", , ) is a type of MOSFET, metal–oxide–semiconductor field-effect transistor (MOSFET) semiconductor device fabrication, fabrication process that uses complementary an ...

technology and lower supply voltages. Surface mount packages exist for several popular logic family functions.

Overview

The 7400 series contains hundreds of devices that provide everything from basic

logic gate A logic gate is a device that performs a Boolean function, a logical operation performed on one or more binary inputs that produces a single binary output. Depending on the context, the term may refer to an ideal logic gate, one that has, for ...

flip-flops Flip-flops are a type of light sandal-like shoe, typically worn as a form of casual footwear. They consist of a flat sole held loosely on the foot by a Y-shaped strap known as a toe thong that passes between the first and second toes and around ...

, and counters, to special purpose bus transceivers and

arithmetic logic unit In computing, an arithmetic logic unit (ALU) is a Combinational logic, combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers. This is in contrast to a floating-point unit (FPU), which operates on ...

s (ALU). Specific functions are described in a

list of 7400 series integrated circuits The following is a list of 7400-series digital logic integrated circuits. In the mid-1960s, the original 7400-series integrated circuits, 7400-series integrated circuits were introduced by Texas Instruments with the prefix "SN" to create the name ...

. Some TTL parts were made with an extended military-specification temperature range. These parts are prefixed with 54 instead of 74 in the part number. The less-common 64 and 84 prefixes on

parts indicated an industrial temperature range. Since the 1970s, new product families have been released to replace the original 7400 series. More recent TTL-compatible logic families were manufactured using

BiCMOS Bipolar CMOS (BiCMOS) is a semiconductor technology that integrates two semiconductor technologies, those of the bipolar junction transistor and the CMOS (complementary metal–oxide–semiconductor) logic gate, into a single integrated circuit. ...

technology rather than TTL. Today,

surface-mount Surface-mount technology (SMT), originally called planar mounting, is a method in which the electrical components are mounted directly onto the surface of a printed circuit board (PCB). An electrical component mounted in this manner is referred ...

ed CMOS versions of the 7400 series are used in various applications in electronics and for

glue logic In electronics, glue logic is the custom logic circuitry used to interface a number of off-the-shelf integrated circuits. This is often achieved using common, inexpensive 7400- or 4000-series components. In more complex cases, a programmable l ...

in computers and industrial electronics. The original

through-hole In electronics, through-hole technology (also spelled "thru-hole") is a manufacturing scheme in which leads on the components are inserted through holes drilled in printed circuit boards (PCB) and soldered to pads on the opposite side, either ...

devices in

dual in-line package In microelectronics, a dual in-line package (DIP or DIL) is an Semiconductor package, electronic component package with a rectangular housing and two parallel rows of electrical connecting pins. The package may be through-hole technology, throu ...

s (DIP/DIL) were the mainstay of the industry for many decades. They are useful for rapid

breadboard A breadboard, solderless breadboard, or protoboard is a construction base used to build semi-permanent prototypes of electronic circuits. Unlike a perfboard or stripboard, breadboards do not require soldering or destruction of tracks and are h ...

-prototyping and for education and remain available from most manufacturers. The fastest types and very low voltage versions are typically

only, however. The first part number in the series, the 7400, is a 14-pin IC containing four two-input

NAND gate In digital electronics, a NAND (NOT AND) gate is a logic gate which produces an output which is false only if all its inputs are true; thus its output is complement to that of an AND gate. A LOW (0) output results only if all the inputs to the ...

s. Each gate uses two input pins and one output pin, with the remaining two pins being power (+5 V) and ground. This part was made in various through-hole and surface-mount packages, including flat pack and plastic/ceramic dual in-line. Additional characters in a part number identify the package and other variations. Unlike the older resistor-transistor logic integrated circuits, bipolar TTL gates were unsuitable to be used as analog devices, providing low gain, poor stability, and low input impedance. Special-purpose TTL devices were used to provide interface functions such as

Schmitt trigger In electronics, a Schmitt trigger is a comparator circuit with hysteresis implemented by applying positive feedback to the noninverting input of a comparator or differential amplifier. It is an passivity (engineering), active circuit which con ...

s or

monostable multivibrator A multivibrator is an electronic circuit used to implement a variety of simple two-state devices such as relaxation oscillators, timers, latches and flip-flops. The first multivibrator circuit, the astable multivibrator oscillator, was invented ...

timing circuits. Inverting gates could be cascaded as a

ring oscillator A ring oscillator is a device composed of an odd number of Inverter (logic gate), NOT gates in a ring, whose output oscillation, oscillates between two voltage levels, representing ''true'' and ''false''. The NOT gates, or inverters, are attach ...

, useful for purposes where high stability was not required.

History

Although the 7400 series was the first ''de facto'' industry standard TTL logic family (i.e. second-sourced by several semiconductor companies), there were earlier TTL logic families such as: * Sylvania Universal High-level Logic in 1963 *

Motorola Motorola, Inc. () was an American multinational telecommunications company based in Schaumburg, Illinois. It was founded by brothers Paul and Joseph Galvin in 1928 and had been named Motorola since 1947. Many of Motorola's products had been ...

MC4000 MTTL *

National Semiconductor National Semiconductor Corporation was an United States of America, American Semiconductor manufacturing, semiconductor manufacturer, which specialized in analogue electronics, analog devices and subsystems, formerly headquartered in Santa Clara, ...

DM8000 *

Fairchild Fairchild may refer to: Organizations * Fairchild Aerial Surveys, operated in cooperation with a subsidiary of Fairey Aviation Company * Fairchild Camera and Instrument * List of Sherman Fairchild companies, "Fairchild" companies * Fairchild ...

9300 series *

Signetics Signetics Corporation was an American electronics manufacturer specifically established to make integrated circuits. Founded in 1961, they went on to develop a number of early microprocessors and support chips, as well as the widely used 555 time ...

8200 and 8T00 The 7400 quad 2-input

was the first product in the series, introduced by

in a military grade metal flat package (5400W) in October 1964. The pin assignment of this early series differed from the ''de facto'' standard set by the later series in DIP packages (in particular, ground was connected to pin 11 and the power supply to pin 4, compared to pins 7 and 14 for DIP packages). The extremely popular commercial grade plastic DIP (7400N) followed in the third quarter of 1966. The 5400 and 7400 series were used in many popular

minicomputer A minicomputer, or colloquially mini, is a type of general-purpose computer mostly developed from the mid-1960s, built significantly smaller and sold at a much lower price than mainframe computers . By 21st century-standards however, a mini is ...

s in the 1970s and early 1980s. Some models of the DEC

PDP PDP may refer to: Computing and technology * Packet Data Protocol in wireless GPRS/HSDPA networks * Parallel distributed processing in Connectionism#Parallel distributed processing, connectionism * Plasma display panel * Policy Decision Point in t ...

-series "minis" used the

74181 The 74181 is a 4-bit slice arithmetic logic unit (ALU), implemented as a 7400 series TTL integrated circuit. Introduced by Texas Instruments in February 1970, it was the first complete ALU on a single chip. It was used as the arithmetic/logic c ...

ALU as the main computing element in the

CPU A central processing unit (CPU), also called a central processor, main processor, or just processor, is the primary processor in a given computer. Its electronic circuitry executes instructions of a computer program, such as arithmetic, log ...

. Other examples were the

Data General Nova The Nova is a series of 16-bit computing, 16-bit minicomputers released by the American company Data General. The Nova family was very popular in the 1970s and ultimately sold tens of thousands of units. The first model, known simply as "Nov ...

series and

Hewlett-Packard The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( ) or HP, was an American multinational information technology company. It was founded by Bill Hewlett and David Packard in 1939 in a one-car garage in Palo Alto, California ...

21MX, 1000, and 3000 series. In 1965, typical quantity-one pricing for the SN5400 (military grade, in ceramic welded

flat-pack Ready-to-assemble furniture (RTA), also known as knock-down furniture (KD), flat-pack furniture, or kit furniture, is a form of furniture that requires customer assembly. The separate components are packed for sale in cartons containing assembl ...

) was around 22

USD The United States dollar (symbol: $; currency code: USD) is the official currency of the United States and several other countries. The Coinage Act of 1792 introduced the U.S. dollar at par with the Spanish silver dollar, divided it int ...

. As of 2007, individual commercial-grade chips in molded epoxy (plastic) packages can be purchased for approximately US$0.25 each, depending on the particular chip. File:NXP-74AHC00D-HD-HQ.jpg,

Die Die, as a verb, refers to death, the cessation of life. Die may also refer to: Games * Die, singular of dice, small throwable objects used for producing random numbers Manufacturing * Die (integrated circuit), a rectangular piece of a semicondu ...

of a 74AHC00D, manufactured by NXP File:SN7400 1965.jpg, SN7400 die in the original flat package, manufactured by TI File:TTL-00-die-schema.jpg, Die vs Schematic of a NAND gate in a 74H00 (

Darlington transistor In electronics, a Darlington configuration (commonly called as a Darlington pair) is a circuit consisting of two bipolar transistors with the emitter of one transistor connected to the base of the other, such that the current amplified by the ...

is visbile on the right) File:7400 Circuit.svg, Schematic of one gate in a 7400 File:74LS00 Circuit.svg, Schematic of one gate in a 74LS00 File:Schéma DM74ALS00.png, Schematic of one gate in a 74ALS00 File:Logic ICs in size comparison.JPG, Size comparison of 74HC00 in DIP vs TSSOP package

Families

7400 series parts were constructed using

bipolar junction transistor A bipolar junction transistor (BJT) is a type of transistor that uses both electrons and electron holes as charge carriers. In contrast, a unipolar transistor, such as a field-effect transistor (FET), uses only one kind of charge carrier. A ...

s (BJT), forming what is referred to as

or TTL. Newer series, more or less compatible in function and logic level with the original parts, use

technology or a combination of the two (

). Originally the bipolar circuits provided higher speed but consumed more power than the competing

4000 series The 4000 series is a CMOS logic family of integrated circuits (ICs) first introduced in 1968 by RCA. It was slowly migrated into the 4000B buffered series after about 1975. It had a much wider supply voltage range than any contemporary logic fami ...

of CMOS devices. Bipolar devices are also limited to a fixed power-supply voltage, typically 5 V, while CMOS parts often support a range of supply voltages.

Milspec A United States defense standard, often called a military standard, "MIL-STD", "MIL-SPEC", or (informally) "MilSpecs", is used to help achieve standardization objectives by the United States Department of Defense. Standardization is beneficial i ...

-rated devices for use in extended temperature conditions are available as the 5400 series. Texas Instruments also manufactured

radiation-hardened Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation (particle radiation and high-energy electromagnetic radiation), especially for environm ...

devices with the prefix ''RSN'', and the company offered beam-lead bare dies for integration into hybrid circuits with a ''BL'' prefix designation. Regular-speed TTL parts were also available for a time in the 6400 series these had an extended industrial temperature range of −40 °C to +85 °C. While companies such as

Mullard Mullard Limited was a British manufacturer of electronics, electronic components. The Mullard Radio Valve Co. Ltd. of Southfields, London, was founded in 1920 by Captain Stanley R. Mullard, who had previously designed thermionic valves (US ...

listed 6400-series compatible parts in 1970 data sheets, by 1973 there was no mention of the 6400 family in the Texas Instruments ''TTL Data Book''. Texas Instruments brought back the 6400 series in 1989 for the SN64BCT540. The SN64BCTxxx series is still in production as of 2023. Some companies have also offered industrial extended temperature range variants using the regular 7400-series part numbers with a prefix or suffix to indicate the temperature grade. As integrated circuits in the 7400 series were made in different technologies, usually compatibility was retained with the original TTL logic levels and power-supply voltages. An integrated circuit made in CMOS is not a TTL chip, since it uses

field-effect transistor The field-effect transistor (FET) is a type of transistor that uses an electric field to control the current through a semiconductor. It comes in two types: junction FET (JFET) and metal-oxide-semiconductor FET (MOSFET). FETs have three termi ...

s (FETs) and not bipolar junction transistors (BJT), but similar part numbers are retained to identify similar logic functions and electrical (power and I/O voltage) compatibility in the different subfamilies. Over 40 different logic subfamilies use this standardized part number scheme. The headings in the following table are: ''V''_cc power-supply voltage; ''t''_pd maximum gate delay; ''I''_OL maximum output current at low level; ''I''_OH maximum output current at high level; ''t''_pd, ''I''_OL, and ''I''_OH apply to most gates in a given family. Driver or buffer gates have higher output currents. Niveaux logiques CMOS-TTL-LVTTL

Many parts in the CMOS HC, AC, AHC, and VHC families are also offered in "T" versions (HCT, ACT, AHCT and VHCT) which have input thresholds that are compatible with both TTL and 3.3 V CMOS signals. The non-T parts have conventional CMOS input thresholds, which are more restrictive than TTL thresholds. Typically, CMOS input thresholds require high-level signals to be at least 70% of Vcc and low-level signals to be at most 30% of Vcc. (TTL has the input high level above 2.0 V and the input low level below 0.8 V, so a TTL high-level signal could be in the forbidden middle range for 5 V CMOS.) The 74H family is the same basic design as the 7400 family with resistor values reduced. This reduced the typical

propagation delay Propagation delay is the time duration taken for a signal to reach its destination, for example in the electromagnetic field, a wire, speed of sound, gas, fluid or seismic wave, solid body. Physics * An electromagnetic wave travelling through ...

from 9 ns to 6 ns but increased the power consumption. The 74H family provided a number of unique devices for CPU designs in the 1970s. Many designers of military and aerospace equipment used this family over a long period and as they need exact replacements, this family is still produced by Lansdale Semiconductor.Lansdale Semiconductor home page
The 74S family, using Schottky circuitry, uses more power than the 74, but is faster. The 74LS family of ICs is a lower-power version of the 74S family, with slightly higher speed but lower power dissipation than the original 74 family; it became the most popular variant once it was widely available. Many 74LS ICs can be found in microcomputers and digital consumer electronics manufactured in the 1980s and early 1990s. The 74F family was introduced by

Fairchild Semiconductor Fairchild Semiconductor International, Inc. was an American semiconductor company based in San Jose, California. It was founded in 1957 as a division of Fairchild Camera and Instrument by the " traitorous eight" who defected from Shockley Semi ...

and adopted by other manufacturers; it is faster than the 74, 74LS and 74S families. Through the late 1980s and 1990s newer versions of this family were introduced to support the lower operating voltages used in newer

devices.

Part numbering

Part number schemes varied by manufacturer. The part numbers for 7400-series logic devices often use the following designators: * Often first, a two or three letter prefix, denoting the manufacturer and flow class of the device. These codes are no longer closely associated with a single manufacturer, for example,

manufactures parts with MM and DM prefixes, and no prefixes. Examples: ** SN:

using a commercial processing ** SNV: Texas Instruments using military processing ** M:

ST Microelectronics STMicroelectronics NV (commonly referred to as ST or STMicro) is a European multinational semiconductor contract manufacturing and design company. It is the largest of such companies in Europe. It was founded in 1987 from the merger of two st ...

** DM:

** UT:

Cobham PLC Cobham Limited is a British aerospace manufacturing company based in Bournemouth, England. Cobham was originally founded by Sir Alan Cobham as Flight Refuelling Limited (FRL) in 1934. During 1939, British airline Imperial Airways performed ...

** SG: Sylvania ** RD:

RIFA AB RIFA AB (originally an abbreviation for Radioindustrins Fabrik Aktiebolag) was a Swedish electronics manufacturer of resistors and capacitors, which was established in 1942. During World War II, RIFA manufactured parts for the Swedish radio indu ...

* Two digits for temperature range. Examples: ** 54: military temperature range ** 64: short-lived historical series with intermediate "industrial" temperature range ** 74: commercial temperature range device * Zero to four letters denoting the logic subfamily. Examples: ** zero letters: basic bipolar TTL ** LS: low power Schottky ** HCT: High-speed CMOS compatible with TTL * Two or more arbitrarily assigned digits that identify the function of the device. There are hundreds of different devices in each family. * Additional suffix letters and numbers may be appended to denote the package type, quality grade, or other information, but this varies widely by manufacturer. For example, "SN5400N" signifies that the part is a 7400-series IC probably manufactured by

("SN" originally meaning "Semiconductor Network") using commercial processing, is of the military temperature rating ("54"), and is of the TTL family (absence of a family designator), its function being the ''quad 2-input NAND gate'' ("00") implemented in a plastic through-hole DIP package ("N"). Many

logic families In computer engineering, a logic family is one of two related concepts: * A logic family of monolithic digital integrated circuit devices is a group of electronic logic gates constructed using one of several different designs, usually with compati ...

maintain a consistent use of the device numbers as an aid to designers. Often a part from a different 74x00 subfamily could be substituted ("

drop-in replacement Drop-in replacement is a term used in computer science and other fields. It refers to the ability to replace one hardware or software component with another, without any other code or configuration changes being required and resulting in no negat ...

") in a circuit, with the same function and pin-out yet more appropriate characteristics for an application (perhaps speed or power consumption), which was a large part of the appeal of the 74C00 series over the competing CD4000B series, for example. But there are a few exceptions where incompatibilities (mainly in pin-out) across the subfamilies occurred, such as: * some flat-pack devices (e.g. 7400W) and surface-mount devices, * some of the faster CMOS series (for example 74AC), * a few low-power TTL devices (e.g. 74L86, 74L9 and 74L95) have a different pin-out than the regular (or even 74LS) series part. * five versions of the 74x54 (4-wide AND-OR-INVERT gates IC), namely 7454(N), 7454W, 74H54, 74L54W and 74L54N/74LS54, are different from each other in pin-out and/or function,

Second sources from Europe and Eastern Bloc

Some manufacturers, such as Mullard and Siemens, had

TTL parts, but with a completely different numbering scheme; however, data sheets identified the ''7400-compatible'' number as an aid to recognition. At the time the 7400 series was being made, some European manufacturers (that traditionally followed the

Pro Electron Pro Electron or EECA is the European type designation and registration system for active devices (such as semiconductors, liquid crystal displays, sensor devices, electronic tubes and cathode-ray tubes). Pro Electron was set up in 1966 in Brussel ...

naming convention), such as

Philips Koninklijke Philips N.V. (), simply branded Philips, is a Dutch multinational health technology company that was founded in Eindhoven in 1891. Since 1997, its world headquarters have been situated in Amsterdam, though the Benelux headquarter ...

, produced a series of TTL integrated circuits with part names beginning with FJ. Some examples of FJ series are: * FJH101 (=7430) single 8-input NAND gate, * FJH131 (=7400) quadruple 2-input NAND gate, * FJH181 (=7454N or J) 2+2+2+2 input AND-OR-NOT gate. The

Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...

started manufacturing TTL ICs with 7400-series pinout in the late 1960s and early 1970s, such as the K155ЛA3, which was pin-compatible with the 7400 part available in the United States, except for using a metric spacing of 2.5 mm between pins instead of the pin-to-pin spacing used in the west. Another peculiarity of the Soviet-made 7400 series was the packaging material used in the 1970s–1980s. Instead of the ubiquitous black resin, they had a brownish-green body colour with subtle swirl marks created during the moulding process. It was jokingly referred to in the Eastern Bloc electronics industry as the "elephant-dung packaging", due to its appearance. The

Soviet integrated circuit designation The soviet integrated circuit designation is an industrial specification for encoding the names of integrated circuits manufactured in the Soviet Union and the Post-Soviet states. 25 years after the dissolution of the Soviet Union, a number of #M ...

is different from the Western series: * the technology modifications were considered different series and were identified by different numbered prefixes – К155 series is equivalent to plain 74, К555 series is 74LS, К1533 is 74ALS, etc.; * the function of the unit is described with a two-letter code followed by a number: ** the first letter represents the functional group – logical, triggers, counters, multiplexers, etc.; ** the second letter shows the functional subgroup, making the distinction between logical NAND and NOR, D- and JK-triggers, decimal and binary counters, etc.; ** the number distinguishes variants with different number of inputs or different number of elements within a die – ЛА1/ЛА2/ЛА3 (LA1/LA2/LA3) are 2 four-input / 1 eight-input / 4 two-input NAND elements respectively (equivalent to 7420/7430/7400). Before July 1974 the two letters from the functional description were inserted after the first digit of the series. Examples: К1ЛБ551 and К155ЛА1 (7420), К1ТМ552 and К155ТМ2 (7474) are the same ICs made at different times. Clones of the 7400 series were also made in other

Eastern Bloc The Eastern Bloc, also known as the Communist Bloc (Combloc), the Socialist Bloc, the Workers Bloc, and the Soviet Bloc, was an unofficial coalition of communist states of Central and Eastern Europe, Asia, Africa, and Latin America that were a ...

countries: *

Bulgaria Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...

(Mikroelektronika

Botevgrad Botevgrad ( ) is a town in western Bulgaria. It is located in Sofia Province and is close to Pravets. Botevgrad lies 47 km from Sofia. History and name The village was called Samundzhievo (Самунджиево) until it was elevated to ...

) used a designation somewhat similar to that of the Soviet Union, e.g. ''1ЛБ00ШМ'' (1LB00ShM) for a 74LS00. Some of the two-letter functional groups were borrowed from the Soviet designation, while others differed. Unlike the Soviet scheme, the two or three digit number after the functional group matched the western counterpart. The series followed at the end (i.e. ''ШМ'' for LS). Only the LS series is known to have been manufactured in Bulgaria. *

Czechoslovakia Czechoslovakia ( ; Czech language, Czech and , ''Česko-Slovensko'') was a landlocked country in Central Europe, created in 1918, when it declared its independence from Austria-Hungary. In 1938, after the Munich Agreement, the Sudetenland beca ...

(

TESLA Tesla most commonly refers to: * Nikola Tesla (1856–1943), a Serbian-American electrical engineer and inventor * Tesla, Inc., an American electric vehicle and clean energy company, formerly Tesla Motors, Inc. * Tesla (unit) (symbol: T), the SI-d ...

) used the 7400 numbering scheme with manufacturer prefix MH. Example: MH7400. Tesla also produced industrial grade (8400, −25 ° to 85 °C) and military grade (5400, −55 ° to 125 °C) ones. *

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

( Unitra CEMI) used the 7400 numbering scheme with manufacturer prefixes UCA for the 5400 and 6400 series, as well as UCY for the 7400 series. Examples: UCA6400, UCY7400. Note that ICs with the prefix MCY74 correspond to the

(e.g. MCY74002 corresponds to 4002 and not to 7402). *

Hungary Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...

(

Tungsram Tungsram was a manufacturing company located in Hungary and known for their light bulbs and electronics. Established in Újpest (today part of Budapest, Hungary) in 1896, it initially produced telephones, wires and switchboards. The name "Tungsr ...

, later Mikroelektronikai Vállalat / MEV) also used the 7400 numbering scheme, but with manufacturer suffix – 7400 is marked as 7400APC. * Romania (I.P.R.S.) used a trimmed 7400 numbering with the manufacturer prefix CDB (example: CDB4123E corresponds to 74123) for the 74 and 74H series, where the suffix ''H'' indicated the 74H series. For the later 74LS series, the standard numbering was used. *

East Germany East Germany, officially known as the German Democratic Republic (GDR), was a country in Central Europe from Foundation of East Germany, its formation on 7 October 1949 until German reunification, its reunification with West Germany (FRG) on ...

( HFO) also used trimmed 7400 numbering without manufacturer prefix or suffix. The prefix D (or E) designates digital IC, and not the manufacturer. Example: D174 is 7474. 74LS clones were designated by the prefix DL; e.g. DL000 = 74LS00. In later years East German made clones were also available with standard 74* numbers, usually for export. GDR semiconductor datasheet comparison
. A number of different technologies were available from the Soviet Union, Czechoslovakia, Poland, and East Germany. The 8400 series in the table below indicates an industrial temperature range from −25 °C to +85 °C (as opposed to −40 °C to +85 °C for the 6400 series). YUNTEN

Around 1990 the production of standard logic ceased in all Eastern European countries except the Soviet Union and later

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

and

Belarus Belarus, officially the Republic of Belarus, is a landlocked country in Eastern Europe. It is bordered by Russia to the east and northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Belarus spans an a ...

. As of 2016, the series 133, К155, 1533, КР1533, 1554, 1594, and 5584 were in production at "Integral" in Belarus, as well as the series 130 and 530 at "NZPP-KBR", 134 and 5574 at "VZPP", 533 at "Svetlana", 1564, К1564, КР1564 at "NZPP", 1564, К1564 at "Voshod", 1564 at "Exiton", and 133, 530, 533, 1533 at "Mikron" in Russia. The Russian company Angstrem manufactures 54HC circuits as the 5514БЦ1 series, 54AC as the 5514БЦ2 series, and 54LVC as the 5524БЦ2 series. As of 2024, the 133, 136, and 1533 series are in production at Kvazar Kyiv in Ukraine.

References

External links

Understanding 7400-series digital logic ICs
- Nuts and Volts magazine

- Electronics Club {{Authority control Integrated circuits Digital electronics 1964 introductions