| 1721481 | ZN427E8 | MICROPROCESSOR COMPATIBLE 8-BIT SUCCESSIVE APPROXIMATION A-D CONVERTER | Zarlink Semiconductor |
| 1721482 | ZN427J8 | Microprocessor compatible 8-bit successive approximation A-D converter | GEC Plessey Semiconductors |
| 1721483 | ZN427J8 | MICROPROCESSOR COMPATIBLE 8-BIT SUCCESSIVE APPROXIMATION A-D CONVERTER | Zarlink Semiconductor |
| 1721484 | ZN428D | 8-bit latched input D-A converter | GEC Plessey Semiconductors |
| 1721485 | ZN428E8 | 8-bit latched input D-A converter | GEC Plessey Semiconductors |
| 1721486 | ZN428J8 | 8-bit latched input D-A converter | GEC Plessey Semiconductors |
| 1721487 | ZN429D | Low cost 8-bit D-A converter | GEC Plessey Semiconductors |
| 1721488 | ZN429E8 | Low cost 8-bit D-A converter | GEC Plessey Semiconductors |
| 1721489 | ZN439 | 8 bit Microprocessor Compatible A-D Converter | GEC Plessey Semiconductors |
| 1721490 | ZN439 | 8 bit Microprocessor Compatible A-D Converter | GEC Plessey Semiconductors |
| 1721491 | ZN439 | 8 bit Microprocessor Compatible A-D Converter | Zetex Semiconductors |
| 1721492 | ZN448E | 8-bit microprocessor compatible A-D converter, linearity error 0.5 LSB | GEC Plessey Semiconductors |
| 1721493 | ZN449D | 8-bit microprocessor compatible A-D converter, linearity error 1 LSB | GEC Plessey Semiconductors |
| 1721494 | ZN449E | 8-bit microprocessor compatible A-D converter, linearity error 1 LSB | GEC Plessey Semiconductors |
| 1721495 | ZN458T | IC for medium wave receiver 150kHz to 3MHz | FERRANTI |
| 1721496 | ZN459 | Low noise preamplifier | FERRANTI |
| 1721497 | ZN508D8 | Dual 8-bit microprocessor compatible D/A converter. +/- 0.5 LSB | GEC Plessey Semiconductors |
| 1721498 | ZN508E7 | Dual 8-bit microprocessor compatible D/A converter. +/- 1 LSB | GEC Plessey Semiconductors |
| 1721499 | ZN508E8 | Dual 8-bit microprocessor compatible D/A converter. +/- 0.5 LSB | GEC Plessey Semiconductors |
|
| 1721500 | ZN525E | 8-bit multifunction data converter | GEC Plessey Semiconductors |
| 1721501 | ZN5400 | 4 NAND gates with 2 inputs each | FERRANTI |
| 1721502 | ZN5401 | 4 NAND gates with 2 inputs each, open collector (5.5V) | FERRANTI |
| 1721503 | ZN5402 | 4 NOR gates with 2 inputs each | FERRANTI |
| 1721504 | ZN5403 | 4 NAND gates with 2 inputs each, open collector (5.5V) | FERRANTI |
| 1721505 | ZN5404 | 6 inverters | FERRANTI |
| 1721506 | ZN5405 | 6 inverters, open collector (5.5V) | FERRANTI |
| 1721507 | ZN5408 | 4 AND gates with 2 inputs each | FERRANTI |
| 1721508 | ZN5409 | 4 AND gates with 2 inputs each, open collector (5.5V) | FERRANTI |
| 1721509 | ZN5410 | 3 NAND gates with 3 inputs each | FERRANTI |
| 1721510 | ZN54107 | 2 Master-Slave JK-Flip-Flops | FERRANTI |
| 1721511 | ZN54118 | 6 RS flip-flops with a common reset input | FERRANTI |
| 1721512 | ZN54119 | 6 RS flip-flops with separate reset input | FERRANTI |
| 1721513 | ZN5412 | 3 NAND gates with 3 inputs each, open collector (5.5V) | FERRANTI |
| 1721514 | ZN54121 | Monostable multivibrator with trigger-schmitt inputs | FERRANTI |
| 1721515 | ZN54122 | Monostable multivibrator, resettable | FERRANTI |
| 1721516 | ZN54123 | 2 monostable multivibrators, resettable | FERRANTI |
| 1721517 | ZN5413 | 2 Schmitt triggers with 4 inputs each, open collector (5.5V) | FERRANTI |
| 1721518 | ZN54150 | 16-bit data selector and multiplexer | FERRANTI |
| 1721519 | ZN54151 | 8-bit data selector and multiplexer | FERRANTI |
| 1721520 | ZN54153 | 2x4 bit data selector and multiplexer | FERRANTI |
