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This article describes the nomenclature for integrated circuits manufactured in the Soviet Union. 25 years after the dissolution of the Soviet Union this designation is still used by a number of manufacturers in Russia, Belarus, Ukraine, Latvia, and Uzbekistan. The designation uses the Cyrillic alphabet which sometimes leads to confusion where a Cyrillic letter has the same appearance as a Latin letter but is romanized as a different letter. Furthermore, for some Cyrillic letters the Romanization is ambiguous.

History

The nomenclature for integrated circuits has changed somewhat over the years as new standards were published:

Throughout this article the standards are referred to by the year they came into force. Before 1968 each manufacturer used its own integrated circuit designation. Following the dissolution of the Soviet Union in 1991, the standards were not as strictly enforced anymore and a number of manufacturers introduced manufacturer-specific designations again. These were typically used in parallel with the standards. However, integrated circuits for military, aerospace, and nuclear applications in Russia still have to follow the standard designation. Underlining this, the 2010 standard is explicitly labelled a Russian military standard. Beside Russia the 2010 standard is applied in Belarus as well. Companies in Ukraine mostly stayed with the 1980 standard and prefixed the designation with the letter У (U), e.g. УМ5701ВЕ51. The 1980 standard was published in Ukraine as DSTU 3212—95 (Ukrainian: ДСТУ 3212-95). Bulgarian designations for bipolar integrated circuits, e.g. 1УО709С, look confusingly similar to the 1968 Soviet designations but the standards differ. The functional group is also indicated by two letters in the cyrillic alphabet and many groups were obviously copied from the Soviet standard (АГ, ИД, ИЕ, ЛБ, ЛН, ЛП, МП, ПК, СА, УС). Some subgroups differ (ТД, УМ, УО) and some groups are completely different (НС, ОИ, РН). For the number after the functional group there is no concept of a series. Instead, that number usually matches the Western counterpart (e.g. the 1УО709С is equivalent to a μA709).

Also as a consequence of dissolution of the Soviet Union, COCOM restrictions were lifted and Russian integrated circuit design firms gained access to foundries abroad. In that sense it could be argued that the importance of the Soviet designation has spread across the globe. When foundries are not able to label the circuit in the Cyrillic alphabet then the Latin alphabet is used (e.g. KF1174PP1[16]).

In general, devices already in production when a new standard came out kept their old designation. However, in some case devices were renamed:

When the 1980 standard was published, devices named after the 1968 standard and still in production were renamed, e.g. К1ЛБ553 to К155ЛА3. As in this example, the renaming was often fairly straightforward: The two parts of the serial number were combined (1 and 55 to 155), the functional group remained unchanged or was converted as in the table below (ЛБ to ЛА), and the variant number remained unchanged (3). In some series the renaming was more complicated.[18] This change affected many series (e.g. 101, 116, 118, 122, 133, 140, 153, 155, 174, 237, 501). Before the introduction of a package designation in 1980 the suffix П (P) was used in some series to indicate a plastic package (as opposed to the then more common ceramic package). In 1983 the package designation was changed for the 531 series (e.g. К531ЛА19П to КР531ЛА19).[6](pp59–60) Other series were similarly renamed at some point (e.g. К501ХЛ1П to КР501ХЛ1). Before the definition of group В (V) in 1980 computing devices were all assigned subgroup ИК (IK), e.g. microprocessors (КР580ИК80А), peripheral devices (КР580ИК51А). With the introduction of group В the devices in the 580 series were renamed (to КР580ВМ80А and КР580ВВ51А, respectively) in 1986. Starting in 2016, certain newer devices were renamed according to the 2010 standard, e.g. 1967ВЦ2Ф to 1967ВН028 and 1586ПВ1АУ to 1583НВ025 (note the change of the series).[20]

Designation structure

Structure of a Soviet integrated circuit designation, used from 1968 Structure of a Soviet integrated circuit designation with 4-digit series, following the 1980 standard (OST 11.073.915—80 ), used in 1973 / 1980 Structure of a Soviet integrated circuit designation, used from 2000 Structure of a Soviet integrated circuit designation, used from 2010

Group Description Example[6][21][22]
Russian English 1968 1973 1980 2000 Original Equivalent
А A Pulse shapers and drivers
АА AA — Address line drivers (esp. for magnetic-core memory ) К170АА7 SN75327
АГ AG — Square wave pulse shapers (including monostable multivibrators ) К555АГ4 74LS221
АИ AI — — — Time interval shaper (timer) 1512АИ1У
АН AN — — — Voltage pulse shaper
АП AP — Other pulse shapers (e.g. digital buffers including tri-state buffers , bubble memory drivers, CCD drivers) 533АП5 54LS244
АР AR — Bit line drivers (esp. for magnetic-core memory ) 146АР1
АТ AT — — — Current pulse shaper
АФ AF — Pulse shapers for special waveforms К174АФ5
Б B Delay devices [a] Array of cells [b]
БА BA — — — Array of analogue cells Н1451БА1У-А502
БК BK — — — Array of mixed signal cells 1451БК2У
БМ BM — Passive delay device —
БП BP — Other delay device Other array of cells (e.g. gate array plus processor) К5512БП1Ф
БР BR — Active delay device (e.g. bucket-brigade device ) — КА528БР2
БЦ BTs, BC — — — Array of digital cells ( gate array ) 5585БЦ1У
В V Computing devices [c]
ВА VA — — Bus interface КР580ВА86 Intel 8286
ВБ VB — — Synchronization device (e.g. arbiter ) КР1810ВБ89 Intel 8289
ВВ VV — — Input / output interface (e.g. serial or parallel interface) КР580ВВ55А Intel 8255
ВГ VG — — Controller (e.g. memory controller , video display controller ) КР1810ВГ88 Intel 8288
ВД VD — — — Mikroprocessor for embedded applications 1875ВД1Т Intel 80C186
ВЕ VE — — Single chip microcontroller КМ1816ВЕ48 Intel 8748
ВЖ VZh — — Specialized device (e.g. error correction circuit) К1800ВЖ5 Motorola MC10905
ВИ VI — — Timer device , real-time clock КР580ВИ53 Intel 8253
ВК VK — — Combined device (e.g. bus controller, GPIB controller) КР580ВК28 Intel 8228
ВМ VM — — Microprocessor [d] КР580ВМ80A Intel 8080
ВН VN — — Programmable interrupt controller КР580ВН59 Intel 8259
ВП VP — — Other computing devices (e.g. gate array ) К1801ВП1
ВР VR — — Extender for e.g. word size , number of ports, number of interrupt lines, available arithmetic operations (esp. a multiplier ) КМ1804ВР1 AMD Am2902
ВС VS — — Microprocessor section, esp. bit-slice КР1804ВС1 AMD Am2901
ВТ VT — — Memory controller КР1804ВТ1 AMD Am2964
ВУ VU — — Microcode control device М1804ВУ4 AMD Am2909
ВФ VF — — Data transformation functions (calculation of e.g. CRC , Fourier transform ) 1815ВФ3
ВХ VKh, VX, VH — — Devices for calculators К145ВХ1
ВЦ VTs, VC — — — Digital signal processor [d] 1967ВЦ3Т ADSP-TS201
ВЮ VYu — — — Controller with analogue inputs and outputs
ВЯ VYa — — — Digital signal processor with analogue inputs and outputs 1879ВЯ1Я
Г G Signal generators and oscillators
ГГ GG — Square wave generators (including astable multivibrators and blocking oscillators ) КР531ГГ1 74S124
ГЛ GL — Sawtooth wave generators (e.g. for CRT deflection circuits) К174ГЛ1 TDA1170
ГМ GM — Noise generators К1316ГМ1У
ГН GN — — — Programmable signal generators 1316ГН2Н4
ГП GP — Other signal generators КМ1012ГП1 MM5555
ГС GS Sine wave generators (including harmonic oscillators ) К277ГС1
ГФ GF Signal generators for special waveforms (including generators for multiple waveforms) К174ГФ2 XR2206
Д D Detectors and demodulators
ДА DA Amplitude modulation detectors К157ДА1
ДИ DI Pulse modulation detectors
ДН DN — — — Voltage detector (monitor) К1230ДН1БР MC34161
ДП DP Other detectors К1230ДП46П MC34064
ДС DS Frequency modulation detectors К2ДС241
ДФ DF Phase modulation detectors К1102ДФ1 MC4044
Е E Power supply devices
ЕА EA — — — Positive fixed voltage linear regulator
ЕВ EV — Rectifiers
ЕГ EG — — — Negative adjustable voltage linear regulator 1349ЕГ1У LM137
ЕД ED — — — Dual-polarity symmetric fixed voltage linear regulator
ЕЕ EE — — — Voltage supervisor, reset circuit 1363ЕЕ1Т MAX709L
ЕИ EI — — — Negative fixed voltage linear regulator 1343ЕИ5У 7905
ЕК EK — — Switched-mode power supply devices К1156ЕК1АП LM2596
ЕЛ EL — — — Dual-polarity asymmetric fixed voltage linear regulator
ЕМ EM — Electric power conversion devices (e.g. thyristor controller) КР1182ЕМ2
ЕН EN Linear voltage regulators К142ЕН8А 7808
ЕП EP Other power supply devices (e.g. charge pump devices) КР1168ЕП1 ICL7660
ЕР ER — — — Positive adjustable voltage linear regulator 1325ЕР1У AMS1117
ЕС ES — — Power supply systems
ЕТ ET Constant current sources УР1101ЕТ51 TSM1051
ЕУ EU — — Controller for switched-mode power supplies КР1033ЕУ2 TDA4605
ЕФ EF — — — Adjustable voltage switched-mode power supply devices К1290ЕФ1АП LM2576-ADJ
Ж Zh Multi-functional devices [e]
ЖА ZhA Analog multi-functional devices — — — К2ЖА375
ЖВ ZhV Analog and logical multi-functional devices — — —
ЖЕ ZhE Analog and pulse multi-functional devices — — —
ЖГ ZhG Logical and pulse multi-functional devices — — — К1ЖГ453
ЖИ ZhI Pulse multi-functional devices — — —
ЖК ZhK Analog, logical, and pulse multi-functional devices — — —
ЖЛ ZhL Logical multi-functional devices — — — K5ЖЛ012
И I Digital circuits
ИА IA — — Arithmetic logic unit [f] 1815ИА1
ИВ IV — Encoder [g] 1564ИВ3 54HC147
ИД ID Decoder КР1564ИД4 74HC155
ИЕ IE Counter 1594ИЕ19 54ACT393
ИК IK Combination of digital circuits [c][f] К145ИК1901
ИЛ IL Half adder K5ИЛ011
ИМ IM — Full Adder [h] КР1594ИМ6 74ACT283
ИН IN — — — Interface receiver, transmitter, or transceiver 5559ИН1Т MAX232
ИП IP Other digital circuits (e.g. parity bit checker, multiplier ) [f] К155ИП3 74181
ИР IR Register , shift register К561ИР2 4015
ИС IS Full Adder [h] — — —
ИФ IF — — — Function expander (e.g. multiplier ) 1825ИФ1У
ИШ ISh Encoder [g] — — — К5ИШ011
К K Switches and Multiplexers
КД KD Diode-based switch — — —
КЗ KZ Opto-electronic switch — — —
КН KN — Analogue switches and Multiplexers for voltages [i] КР590КН1
КП KP Other switches and Multiplexers (especially digital; also optocouplers ) К561КП1 4052
КТ KT Transistor-based switch Analogue switches and Multiplexers for currents [i] К561КТ3 4066
Л L Logic gates
ЛА LA — NAND gates [j] К155ЛА3 7400
ЛБ LB NAND gates and NOR gates [j] 134ЛБ1
ЛД LD — Expander [k] 133ЛД1 5460
ЛЕ LE — NOR gates [j] 530ЛЕ1 54S02
ЛИ LI AND gates КР531ЛИ3 74S11
ЛК LK AND-OR-NOT/AND-OR gates [l] 199ЛК3
ЛЛ LL OR gates 533ЛЛ1 54LS32
ЛМ LM — OR-NOT/OR gates К500ЛМ101 Motorola MC10101
ЛН LN NOT gates К555ЛН1 74LS04
ЛП LP Expander [k] Other gates (e.g. XOR gates , majority function gates) [m] 1531ЛП5 54F86
ЛР LR AND-OR-NOT gates КР1531ЛР11 74F51
ЛС LS AND-OR gates [l] К561ЛС2 4019
ЛЭ LE Other gates [m] — — — К1ЛЭ941
М M Modulators
МА MA Amplitude modulators (e.g. ring modulator ) КР140МА1
МИ MI Pulse modulators К854МИ1
МП MP Other modulators (e.g. quadrature amplitude modulator ) 1324МП1У AD8346
МС MS Frequency modulators
МФ MF Phase modulators К1327МФ1У
Н N Arrays of electronic components
НД ND Diode array К142НД3
НЕ NE Capacitor array 2НЕ601
НК NK Array with a combination of components К217НК1
НП NP — Array of other components
НР NR — Resistor array [n] К318НР1
НС NS Resistor array [n] — — — 3НС011А
НТ NT Transistor array КР198НТ9
НФ NF — — Array with a specific function (e.g. resistor ladder ) 317НФ1
П P Signal converters
ПА PA — Digital-to-analogue converter [o] КР572ПА7 AD7541
ПВ PV — Analogue-to-digital converter [p] 1108ПВ1 TDC1013J
ПД PD Decoding converter (incl. Digital-to-analogue converter [o]) Pulse duration converter К1102ПД1
ПЕ PE — — Analogue frequency multiplier
ПК PK Coding converter (incl. Analogue-to-digital converter [p]) — Analogue frequency divider [q] К1055ПК1Т1
ПЛ PL — — Frequency synthesizer КР1508ПЛ1 NJ88C30
ПМ PM Signal shape converter Power converter (including attenuators ) КР1446ПМ1
ПН PN Voltage converter Voltage or current converter К252ПН1
ПП PP Other converter (including photovoltaic optocouplers ) КР572ПП2 ICL7104
ПР PR — Code converter К155ПР7 74185
ПС PS Frequency converter (including frequency mixers , analog multipliers ) К174ПС4
ПТ PT — — — Digital potentiometer 1315ПТ11Т AD8400
ПУ PU Signal level converter (including impedance matching , logic voltage level shifters ) К561ПУ4 4050
ПФ PF Phase converter[r] Functional signal converter (e.g. digital autocorrelator ) 5862ПФ1Н4
ПЦ PTs, PC — — Digital frequency divider К555ПЦ1 74LS292
Р R Memory devices [s]
РА RA — Analogue memory Associative memory К589РА04 Intel 3104
РВ RV — Matrix of ROM elements (e.g. Diode matrix ) К539РВ1А
РГ RG — — — FIFO [t] 1642РГ1РБМ IDT7205L
РД RD — — — DRAM [u] 1654РД2 MT48LC4M16A2P
РЕ RE — ROM (including PROM ) [v] Mask ROM [v] К155РЕ21 74187
РК RK — — — Multi-ported RAM (e.g. dual-ported RAM ) [t] 1642РК1УБМ IDT7005
РМ RM — Matrix of RAM elements К188РМ1
РН RN — — — NVRAM
РП RP — Other memory devices (e.g. dual-ported RAM ) [t] Other memory devices К1800РП6 Motorola MC10806
РР RR — — EEPROM [v] EEPROM or Flash memory with a parallel interface [w] КМ1609РР1 2816
РС RS — — — EEPROM or Flash memory with a serial interface [w] 1644PC1ATБM 24FC65
РТ RT — — PROM [v] 530РТ1 54S287
РУ RU — RAM ( DRAM or SRAM ) SRAM [u] КР537РУ16А 6264
РФ RF — — EPROM [v] К573РФ8А 27256
РЦ RTs, RC — — Bubble memory К1602РЦ2Б
С S Comparators
СА SA Amplitude (signal level) comparator [x] Voltage comparator К1401СА1 LM339
СВ SV Timing comparator К2СВ381
СК SK — — Amplitude (signal level) comparator (including sample-and-hold circuits)[x] КР1100СК3 LF398
СП SP — Other comparator (especially digital comparator ) Other comparator К555СП1 74LS85
СС SS Frequency comparator К284СС2А
СФ SF Phase comparator[y] —
СЦ STs — — — Digital comparator
Т T Triggers / Flip-Flops
ТВ TV — JK flip-flops 1533ТВ6 54ALS107
ТД TD Dynamic flip-flops
ТК TK Combination of triggers / flip-flops K5TK011
ТЛ TL — Schmitt triggers [z] КР1533ТЛ2 74ALS14
ТМ TM — D flip-flops 1554ТМ2 54AC74
ТП TP — Other triggers / flip-flops
ТР TR RS flip-flops КР1554ТР2 74AC279
ТС TS T flip-flops [aa] — — — К2ТС241
ТТ TT — T flip-flops [aa]
ТШ TSh Schmitt triggers [z] — — — К1ТШ221В
У U Amplifiers
УБ UB Video amplifier — — — К1УБ181Б
— — — Instrumentation amplifier К1463УБ1Р
УВ UV — Radio frequency (high frequency) amplifier 171УВ2 μA733
УГ UG — — — Low-noise amplifier
УД UD — Operational amplifier or Differential amplifier [ab] Operational amplifier КР140УД7 μA741
УЕ UE — Unity gain buffer (e.g. emitter follower ) [ac] КР1436УЕ1
УИ UI Pulse amplifier КР1054УИ1 TBA2800
УК UK — — Wideband amplifier (e.g. video amplifier ) К174УК1 TCA660
УЛ UL — Read amplifier (e.g. for magnetic core memory , magnetic tape , magnetic disks ) КР1075УЛ1 TA7784P
УМ UM — Indicator amplifier 564УМ1 4054
УН UN — Audio frequency (low frequency) amplifier КР1438УН2 LM386
УП UP Other amplifier (e.g. log amplifier , limiter , gyrator ) 174УП2 TL441CN
УР UR — Intermediate-Frequency (IF) amplifier К174УР12 TDA4420
УС US Sine wave amplifier — Differential amplifier [ab] К157УС1
УТ UT DC amplifier [ab] КР119УТ1
УУ UU — — — Programmable-gain amplifier К1463УУ1 AD620
УФ UF — — — Functional amplifier (e.g. Log amplifier ) 1313УФ1АУ
УЭ UE Unity gain buffer (e.g. emitter follower ) [ac] — — — К2УЭ182
Ф F Filters
ФА FA — — — Adaptive filter
ФБ FB — — — Band-pass filter [ad]
ФВ FV High-pass filter 528ФВ1
ФГ FG Band-stop filter [ae] — — —
ФЕ FE — Band-pass filter [ad] — 811ФЕ1
ФМ FM — — — Programmable filter
ФН FN Low-pass filter И1146ФН1
ФП FP Band-pass filter [ad] Other filter КР1146ФП1 MK5912
ФР FR — Band-stop filter [ae]
ФС FS Smoothing filter — — —
ФУ FU — — — Universal filter 1478ФУ1Т MAX274
Х Kh, X, H Multi-functional devices [e]
ХА KhA, XA, HA — Analog multi-functional devices КР1568ХА3 TDA4555
ХБ KhB, XB, HB — — — Multifunctional device for radio, television, tape recorders , displays К1879ХБ1Я
ХВ KhV, XV, HV — — — Multi-functional device for automotive electronics К1323ХВ1Р L497B
ХД KhD, XD, HD — — — Multi-functional device for telecommunications 1892ХД1Я
ХИ KhI, XI, HI — — Array of analogue cells [af]
ХК KhK, XK, HK — Combination of multifunctional devices (including mixed signal multi-functional devices) КР1051ХК1 TDA8432
ХЛ KhL, XL, HL — Digital multi-functional devices КР1568ХЛ2 TDA3048
ХМ KhM, XM, HM — — Array of digital cells ( gate array ) [b] — 1515ХМ1
ХН KhN, XN, HN — — Array of analogue cells [b] — Н1451ХН3-А502
ХП KhP, XP, HP — Other multi-functional devices (e.g. programmable logic devices ) Other multi-functional devices КР1556ХП4 PAL16R4
ХР KhR, XR, HR — — — Multi-functional circuit for household devices К1331ХР1П
ХС KhS, XS, HS — — — Programmable logic devices 5577ХС2Т Actel RH1020
ХТ KhT, XT, HT — — Array of mixed signal cells [b] — 5515ХТ1У
ХХ KhKh, XX, HH — — — Multi-functional devices for power electronics 1474ХХ3Т HCPL316J
Ц Ts, C Charge-coupled device image sensors
ЦЛ TsL, CL — — One-dimensional (linear) image sensor 1200ЦЛ3 CCD131
ЦМ TsM, CM — — Two-dimensional image sensor К1200ЦМ1 CCD211
ЦП TsP, CP — — Other image sensor
Ч Ch Transducers / Sensors
ЧВ ChV — — — Humidity sensor
ЧГ ChG — — — Gas sensor
ЧД ChD — — — Pressure sensor К1245ЧД1Н3
ЧИ ChI — — — Ionizing radiation sensor
ЧМ ChM — — — Mechanical displacement sensor 1243ЧМ3Н4
ЧП ChP — — — Other sensor
ЧТ ChT — — — Temperature sensor 1019ЧТ4У LM135
ЧЭ ChE — — — Electromagnetic field sensor
Ш Sh Delay devices [a]
ШП ShP Other delay device — — —
ШС ShS Active or passive delay device — — —
Э E Delay devices [a]
ЭМ EM — — — Passive delay device
ЭП EP — — — Other delay device
ЭР ER — — — Active delay device (e.g. bucket-brigade device )
Я Ya Memory devices [s]
ЯЛ YaL Magnetic memory device — — —
ЯП YaP Other memory device (e.g. RAM or ROM memory element) — — — K5ЯП011
ЯМ YaM Matrix of memory elements ( RAM or ROM ) — — — К1ЯМ411

Group Description Example
Russian English 2010 Original Equivalent
В V Computing devices
ВВ VV Input / output interface (e.g. serial or parallel interface) 2011ВВ034
ВМ VM Microprocessor 1907ВМ014
ВН VN Digital signal processor [d] 1967ВН034 ADSP-TS201
Е E Power supply devices
ЕВ EV Switched-mode power supply devices 5319ЕВ025
ЕТ ET Constant current sources 3005ЕТ015
ЕУ EU Controller for switched-mode power supplies 1363ЕУ045
К K Switches and Multiplexers
КИ KI Intelligent switch (power switch with protection circuits) К1376КИ021 BTS141
КН KN Analogue switches and Multiplexers 5023КН015 ADG731
Н N Signal converters
НА NA Digital-to-analogue converter [o] 430НА014
НВ NV Analogue-to-digital converter [p] 5023НВ04В5
Р R Memory devices
РА RA SRAM 1669РА03Н4 ACT-S512K8
РЕ RE NVRAM 1666РЕ014
РС RS EEPROM or Flash memory with a serial interface 5578РС015
РТ RT PROM 5578РТ015
Т T Multi-functional devices
ТР TR Array of mixed signal cells 5400ТР045А
ТС TS Programmable logic devices 5578ТС024
У U Amplifiers
УА UA Operational amplifier 1494УА02Б3
УК UK Low-noise amplifier 5401УК015
УМ UM Functional amplifier (e.g. Log amplifier ) 1259УМ015 AD640