| 1721521 | ZN54154 | 4-bit binary decoder and demultiplexer | FERRANTI |
| 1721522 | ZN54155 | 2x2-bit binary decoder and demultiplexer | FERRANTI |
| 1721523 | ZN54157 | 4x2 bit data selector and multiplexer | FERRANTI |
| 1721524 | ZN54161 | Synchronous 4-bit binary counter | FERRANTI |
| 1721525 | ZN54163 | Synchronous 4-bit binary counter | FERRANTI |
| 1721526 | ZN54164 | 8-bit shift register with parallel output | FERRANTI |
| 1721527 | ZN54165 | 8-bit parallel input shift register | FERRANTI |
| 1721528 | ZN54166 | 8-bit shift register | FERRANTI |
| 1721529 | ZN54170 | 16-bit read-write memory with words of 4 bits each | FERRANTI |
| 1721530 | ZN54174 | 6 D flip flops with reset input | FERRANTI |
| 1721531 | ZN54175 | 4 D flip flops with reset input | FERRANTI |
| 1721532 | ZN54180 | 8-bit parity checker | FERRANTI |
| 1721533 | ZN54181 | 4-bit computing element | FERRANTI |
| 1721534 | ZN54184 | 6-bit BCD binary converter | FERRANTI |
| 1721535 | ZN54191 | 4-bit binary reversal counter | FERRANTI |
| 1721536 | ZN54192 | Decimal reversal counter | FERRANTI |
| 1721537 | ZN54193 | 4-bit binary reversal counter | FERRANTI |
| 1721538 | ZN54194 | 4-bit shift register | FERRANTI |
| 1721539 | ZN54197 | 4-bit binary counter for 50 MHz | FERRANTI |
|
| 1721540 | ZN5420 | 2 NAND gates with 4 inputs each | FERRANTI |
| 1721541 | ZN5425 | 2 NOR gates with 4 inputs each and strobe | FERRANTI |
| 1721542 | ZN5427 | 3 NOR gates with 3 inputs each | FERRANTI |
| 1721543 | ZN5428 | 4 NOR gates with 2 inputs each | FERRANTI |
| 1721544 | ZN5430 | 1 NAND gate with 8 inputs each | FERRANTI |
| 1721545 | ZN5432 | 4 OR gates with 2 inputs each | FERRANTI |
| 1721546 | ZN5437 | 4 NAND drivers with 2 inputs each | FERRANTI |
| 1721547 | ZN5438 | 4 NAND drivers with 2 inputs each, open collector (5.5V) | FERRANTI |
| 1721548 | ZN5440 | 2 NAND drivers with 4 inputs each | FERRANTI |
| 1721549 | ZN5442 | BCD/Decimal decoder with logic output | FERRANTI |
| 1721550 | ZN5450 | 2 AND-NOR gates with 2x2 AND inputs, expandable | FERRANTI |
| 1721551 | ZN5451 | 2 AND-NOR gates with 2x2 AND inputs | FERRANTI |
| 1721552 | ZN5453 | 1 AND-NOR gate with 4x2 AND inputs, expandable | FERRANTI |
| 1721553 | ZN5454 | 1 AND-NOR gate with 4x2 AND inputs | FERRANTI |
| 1721554 | ZN5460 | 2 expansion gates with 4 inputs each | FERRANTI |
| 1721555 | ZN5470 | JK Flip-Flop | FERRANTI |
| 1721556 | ZN5472 | Master-Slave JK Flip-Flop | FERRANTI |
| 1721557 | ZN5473 | 2 Master-Slave JK Flip-Flops | FERRANTI |
| 1721558 | ZN5474 | 2 D-Flip-Flops | FERRANTI |
| 1721559 | ZN5475 | 4 D-Flip-Flops | FERRANTI |
| 1721560 | ZN5476 | 2 Master-Slave JK Flip-Flops | FERRANTI |
