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On old HP boards all chips and boards all had an HP number to represent the name/number of the part. In many cases, the original part number was left out making it impossible to tell what the function was. Here is a list of HP part numbers and their real part numbers

HP Number Equivalent Comments
1LB3-0003  ? HPIL Chip
1LF4-0001  ? Video Chip, 82163
1LG7-0064  ? Saturn ROM, all Thinkjets
1LG8-0001  ? Saturn RAM, 2K*4
1LH4-0001 Combined 75160/75161 GPIB drivers HPIB Buffer, 40 pin
1LJ7-0014 Saturn CPU, Centronics and RS232 Thinkjet
1LJ7-0015 Saturn CPU, HPIL and HPIB Thinkjet
1LJ7-0024 Saturn CPU, Portable Parallel Thinkjet
1QF6-0066  ? ADC Hybrid, 3421 DAQ unit
1QH5-0085  ? Input Hybrid, 3421 DAQ unit
1RD2-6001 Cerberus HP-HIL Master Chip
1RE3-0001 Pacific HP150-II Alpha Video Gate Array
1TL1-0001 Medusa HPIB Controller (48 pin DIP)
1TL1-0006 Medusa HPIB Controller
1810-0076 SIL Resistor 1k8*8
1810-0081 Resistor Pack Multi-Value, 27110 HPIB
1810-0122 Resistor Pack 3k3*13
1810-0190 Resistor Pack 2k2*13
1810-0206 Resistor Pack 10k SIP
1810-0235 Resistor Pack 2k2 * 15
1810-0485 Resistor Pack 22k * 7 DIP
1810-0592 RC Network HPIL termination
1810-0651 Network HPIL components
1810-0719 Resistor Pack 1k5 * 15
1810-0307 AB316-101 100 Ohm resistor pack
1813-0327 Delay Line 35ns, 75ns HP150 RAM card
1813-0285 20 MHz osc
1813-0453 35.19 MHz osc
1816-0916
1816-1104  ?? 1k ROM - HP1350 Char Gen
1816-1105  ?? Ditto
1816-1118  ?? 256byte ROM - HP1350 Char Gen
1816-1119  ?? Ditto
1816-1120 82S126 Programmed for hp1350 I/O
1816-1371
1816-1697 63S241 PROM - HP150 Expanded RAM card
1818-0156  ?? HP 4K DRAM, 22Pin
1818-0373 MK34127N
1818-0498 TMS2516JL-45 TI 16k UV-EPROM
1818-0643 6514? 1K*4 CMOS RAM
1818-0701 6810 128*8 RAM
1818-1611 6116 2K*8 RAM
1818-1633 AMD UV-EPROM
1818-1754 uPD5101 1K*4 CMOS SRAM
1818-1774 2114 1K*4 RAM
1818-1817 MK36844 ROM - HP9836
1818-1818 MK36844 ROM - HP9836
1818-1437 uPD446C-2
1818-3059 4164 DRAM
1818-3079 2364 8K*8 ROM, 3421 DAQ unit
1818-3080 2364 8k*8 ROM, 3421 DAQ unit
1818-3198 6264 8K*8 RAM
1818-3447 27128 EPROM
1818-3526 Am9233CPC
1818-3529 23256 HP150-II ROM 1
1818-3530 23256 HP150-II ROM 2
1818-3531 23256 HP150-II ROM 3
1818-3604 27128 EPROM
1818-3648 23256 HP150-II ROM 0
1818-3649 23256 HP150-II ROM 4
1818-3932 62256 32K * 8 SRAM
1818-4372 27128 EPROM
1818-4373 27128 EPROM
1820-0018  ?? Op-amp, Standard pinout
1820-0051 uA702 Op-amp
1820-0054 4342=7400 TTL Quad 2-input NAND
1820-0055 7490
1820-0056 7492
1820-0063 7451
1820-0068 7410
1820-0069 7420
1820-0070 7430
1820-0071 7440 .
1820-0072 7450
1820-0074 7454
1820-0075 7473
1820-0077 4354=7474 TTL Dual D flip-flop
1820-0084 7453
1820-0085 7460
1820-0093  ?? HP custom decade counter - like 7490
1820-0094 6903 DTL ~= 7400
1820-0099 7493
1820-0107  ?? Interface Buffer
1820-0116  ?? HP custom latch - like 7475
1820-0125 711 Dual Comparator
1820-0174 7404
1820-0175 7405
1820-0196 723 TO99 Package
1820-0203 SL8940 Op-Amp, Standard pinout, ext comp.
1820-0223 LM301AH TO-99 METAL CAN Op-Amp, Standard pinout, ext comp.
1820-0233 74193
1820-0244 SL701 Op-amp
1820-0245 SL702 Op-amp
1820-0250  ?? 6 Bit Comparator - 5055 Printer
1820-0256 MC858 DTL Quad 2-input NAND
1820-0258 8193 DTL Dual JK flip-flop
1820-0261 74121
1820-0269 7403
1820-0282 7486
1820-0294 74164
1820-0321 710 Comparator, TO99 package
1820-0328 7402
1820-0348 4506 DTL Dual 4-input NAND
1820-0363 7482
1820-0364 7491
1820-0370 74H00
1820-0371 74H10
1820-0373 74H20
1820-0376 74H40
1820-0380 74H53
1820-0383 74H60
1820-0386 74H71
1820-0430 78H05 ? 5V Voltage regulator, TO3 case
1820-0430 lm309k 5V regulator, TO3
1820-0443 14960 Looks like 7493?
1820-0471 7406
1820-0478  ?? Op-Amp, Ext Comp, Standard pinout, TO99
1820-0509 1488 RS232 Driver
1820-0511 7408
1820-0513 7409
1820-0514 7426
1820-0535 55451
1820-0537 7413?
1820-0567 MC4024 Dual VCO (Voltage controlled Oscillator)
1820-0583 74L00
1820-0584 74L02
1820-0586 74L04
1820-0587 74L10
1820-0590 74L51
1820-0591 74L54
1820-0594 74L72
1820-0595 74L73
1820-0596 74L74
1820-0599 74L95
1820-0620 74153
1820-0621 7438
1820-0622 74151
1820-0627 93L01 BCD-Dec decoder
1820-0629 74S112
1820-0640 74150
1820-0655
1820-0656 74L98
1820-0658 93L12DC Mux
1820-0668 7407
1820-0681 74S00
1820-0682 74S03
1820-0683 74S04
1820-0684 74S05
1820-0685 74S10
1820-0686 74S11
1820-0688 74S20
1820-0693 74S74
1820-0702 93L1159 1-16 decoder
1820-0704 74122
1820-0706 9324 5-bit comparator
1820-0710 SL17315=74157 Mux
1820-0716 74161
1820-0744 7497
1820-0777  ?74L42 BCD-Decimal decoder
1820-0788 SN35431=74174?
1820-0798  ?? HP custom - 6 decade counter
1820-0799 75452
1820-0839 74175
1820-0876 74L75
1820-0904 93L24 Comparator
1820-0939 4013
1820-0990 1489 RS232 Receiver
1820-1016 75453
1820-1032 74198
1820-1050 75454
1820-1053 7414???
1820-1056 74132
1820-1057 DM86L76N
1820-1072 74S139
1820-1074 74128
1820-1076 74S174
1820-1077 74S157
1820-1112 74LS74
1820-1114 mc14510bcp bcd up/down counter cmos
1820-1120 uhp-402 sprague "general interface buffer" (HP special)
1820-1144 74LS02
1820-1146 4050
1820-1150 4518
1820-1166 DM85L51N
1820-1193 74LS197
1820-1194 74LS193
1820-1195 74LS175
1820-1196 74LS174
1820-1197 74LS00
1820-1198 74LS03
1820-1199 74LS04
1820-1200 74LS05
1820-1201 74LS08
1820-1202 74LS10
1820-1203 74LS11
1820-1204 74LS20
1820-1205 74LS21
1820-1206 74LS27
1820-1207 74LS30
1820-1208 74LS32
1820-1210 74LS51
1820-1211 74LS86
1820-1212 74LS112
1820-1216 74LS138
1820-1217 74LS151
1820-1238 74LS253
1820-1240 74S138
1820-1244 74LS153
1820-1245 74LS155
1820-1257 74159
1820-1258 74178
1820-1260 74LS221
1820-1275 74S260
1820-1280 74LS181
1820-1281 74LS139
1820-1282 74LS109
1820-1285 74LS54
1820-1296 74LS295
1820-1297 74LS266
1820-1298 74LS251
1820-1300 74LS195
1820-1301 74S257
1820-1304 74S194
1820-1307 74S132
1820-1322 74S02
1820-1323 74S30
1820-1348 MM5307N Baud Rate Gen
1820-1358 93L34PC Latch
1820-1367 74S08
1820-1402 74LS365
1820-1411 74LS75
1820-1412 4556
1820-1416 74LS14
1820-1419 74LS85
1820-1422 74LS122
1820-1423 74LS123
1820-1425 74LS132
1820-1427 74LS156
1820-1428 74LS158
1820-1430 74LS161
1820-1433 74LS164
1820-1435 74LS669
1820-1437 74LS221
1820-1438 74LS257
1820-1439 74LS258
1820-1440 74LS279
1820-1441 74LS283
1820-1442 74LS290
1820-1443 74LS293
1820-1444 74LS298
1820-1445 74LS375
1820-1447 74LS670
1820-1449 74S32
1820-1451 74S38
1820-1453 74S163
1820-1469 74LS107
1820-1470 74LS157
1820-1478 74LS93
1820-1486 4081
1820-1491 74LS367
1820-1492 74LS368
1820-1562 74C175  ?
1820-1563 74C175  ?
1820-1568 74LS125
1820-1633 74S240
1820-1641 74LS365
1820-1645 74LS126
1820-1655 74C906 Hex buffer
1820-1673 SN97558N
1820-1676 74S373
1820-1689 MC3446 GPIB Buffer
1820-1729 74LS259
1820-1730 74LS273
1820-1745 4001
1820-1746 4049
1820-1747 mc14011bcp 2i/p nand cmos
1820-1753 74C74
1820-1804 MPQ6842 Transistor Array
1820-1810 MC3460 Clock Driver
1820-1851 74LS148
1820-1897 mc14024bcp 7 stage cmos counter
1820-1905 74S260
1820-1917 74LS240
1820-1918 74S241
1820-1932 4538
1820-1943 74S169
1820-1960 4012
1820-1962 4028 CMOS Decoder
1820-1963 mc14013bcp dual d flip flop
1820-1964 4027
1820-1970 4071
1820-1989 74LS393
1820-1997 74LS374
1820-2008 mc14015bcp parallel out shift register. dual 4 bit cmos
1820-2013 4016
1820-2015 mc14070bcp quad xor cmos
1820-2024 74LS244
1820-2031 4014
1820-2037 mc14081bcp 2i/p and cmos
1820-2044 74LS244
1820-2058 MC3448 GPIB Buffer
1820-2075 74LS245
1820-2078 74LS490
1820-2096 74LS393
1820-2099 6802 Microprocessor ?
1820-2102 74LS373
1820-2111 75468 Line Driver
1820-2117 9636 Line Driver
1820-2177 8243 I/O expander
1820-2198 9637 Line Receiver
1820-2199 9638 Line Driver
1820-2204 6402 UART
1820-2206 74LS640
1820-2208 75462
1820-2210 74C00
1820-2211 74C04
1820-2215 74C373
1820-2216 74C374
1820-2220 4076
1820-2232 4034
1820-2268 74LS645
1820-2298 Z8400A Z80A CPU
1820-2299 Z8410A
1820-2300 Z8442A
1820-2378 AM2910DC AMD bitslice processor
1820-2466 7555 CMOS timer
1820-2483 75161 GPIB Control Buffer
1820-2485 75160 GPIB Data Buffer
1820-2488 74ALS74
1820-2505 68000 CPU (may be 68010)
1820-2506 74F04
1820-2520 75463
1820-2531 8250 Serial Chip ????
1820-2536 74LS352
1820-2357 74C244
1820-2538 74C240
1820-2547 75162 GPIB Control Buffer
1820-2548 9914 GPIB Controller
1820-2549 8291 GPIB Interface
1820-2557 74AS804 line driver
1820-2564 8041 Peripheral Controller HP9836
1820-2566 74C240
1820-2577 6551 Serial Chip
1820-2621 74S255
1820-2622 74LS624
1820-2624 68B09 Microprocessor
1820-2634 74ALS04
1820-2635 74ALS08
1820-2649 Z80B CPU Microprocessor
1820-2656 74ALS00
1820-2657 74ALS32
1820-2673 3870 Microcontroller, 82161 tape drive
1820-2692 74F86
1820-2698 74F240
1820-2657 74ALS32
1820-2718 8039 ROMless microcontroller
1820-2724 74ALS573
1820-2737 8048 Programmed for 82163 video interface
1820-2739 74ALS02
1820-2740 74LS688
1820-2772 74ALS112
1820-2774 74ALS20
1820-2775 74ALS10
1820-2809 3870 Microcontroller, 82165 GPIO
1820-2813 MM58167 Real Time Clock
1820-2861 74F138
1820-2862 DS3667
1820-2948 8088-2 8 MHz CPU
1820-2960 COM8116 Baud Rate Generator
1820-2975 C-2000 Gate Array backplane, 27110 HPIB etc.
1820-2983 68B21 PIA
1820-2998 74HC373
1820-3084 8048 Programmed for 82169 HPIB interface
1820-3089 7201 NEC Serial Chip
1820-3100 74ALS138
1820-3121 74ALS245
1820-3167 74LS592
1820-3258 74ALS137
1820-3217 74ALS569
1820-3218 8048 Programmed for 82164 RS232
1820-3267 C2000 Masked Gate Array 98196 Mux
1820-3321 1489
1820-3322 1488
1820-3331 Z8530 Serial Comms Controller
1820-3358 16R6 PAL
1820-3359 16R4 PAL
1820-3378 74ALS373
1820-3420 PAL16L8 HP150 RAM Card
1820-3431 75160
1820-3439 74ALS253
1820-3443 74AS808
1820-3465 74ALS174
1820-3466 74ALS175
1820-3467 74ALS832
1820-3513 75161
1820-3542 74AS373
1820-3545 80C96
1820-3608 74AS04
1820-3636 8048L HPIB Thinkjet I/O PCB
1820-3659 WD2793 Disk Controller
1820-3695 74AS374
1820-3707 74ALS541
1820-3730 74AS08
1820-3766 WD2010 Hard Disk Controller
1820-3825 Z8536 Parallel/Counter
1820-3828 AM7990
1820-3883 Kaze HP150-II Graphics Gate Array
1820-3905 74ALS623
1820-3926 68000 10 MHz
1820-3927 AMD 8622DB
1820-3936 8049 RS232 Thinkjet I/O PCB
1820-3957 Pamela HP150-II Memory gate array
1820-4092 8742 HP150-II HP-HIL System
1820-4192 PAL16R8 98625 GPIB card
1820-4193 PAL16L8 98625 GPIB card
1820-4194 16R4 LANIC
1820-4195 16R6 LANIC Ethernet
1820-4213 PAL20R8 98625 GPIB card
1820-4222 Z8611-12 Masked Microcontroller 27110 HPIB
1820-4401 AM7992
1820-4765 HAL16L8 HP150 Expanded RAM card
1820-4766 HAL20X8 HP150 Expanded RAM card
1820-4767 PAL20L10 HP150 Expanded RAM card
1820-4768 PAL20L10 HP150 Expanded RAM card
1820-4875 16R8 PAL, 27110 HPIB
1820-5980 16R6 PAL, Lanic
1820-5992 AM9516
1821-0001 CA3046 5 NPN Transistors
1826-0009  ?? Opamp, T099 package
1826-0059 LM201
1826-0064 733 Amplifier
1826-0065 LM311
1826-0072 LM208
1826-0081 LM318 TO99 Package
1826-0089  ?? Op-Amp, TO99 package, standard pinout
1826-0106 7815
1826-0122 7805
1826-0138 LM339
1826-0147 7812
1826-0167 CA3094 TO99 Package
1826-0174 MC3302
1826-0180 555
1826-0181 78H05
1826-0188 MC1408 8-BIT DAC
1826-0194 NE592
1826-0210 NE527 Comparator - NE529??? LM361
1826-0214 7915
1826-0271 741
1826-0294 7912
1826-0346 LM358
1826-0357 LF357 TO99 Package
1826-0393 LM317T
1826-0412 LM393
1826-0493 LM308
1826-0522 TL074 Quad Op-Amp
1826-0527 LM337T
1826-0544 MC1403
1826-0635 OP-07CP
1826-0698 AD590JH Temperature Sensor
1826-0719 LM346
1826-0774 LM385BZ
1826-0822 AD524KH Instrumentation amplifier
1826-0903 MC1372 Video Modulator
1826-0904 LM330T-5.0
1826-1014 78H12
1826-1218 7824
1858-0044 TPQ3904  ? 4 NPN Transistors
1858-0047 uln2003an npn darlington transistor array
1858-0050 CA3082 NPN 7-transistor array
1858-0058 TPQ3906  ? 4 PNP Transistors
1858-0097 ULN2023A
1858-0099 MC1413 7 Drivers


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