| 667241 | HEF4025BP | Triple 3-input NOR gate | Philips |
| 667242 | HEF4025BPB | Triple 3-input NOR gate | Philips |
| 667243 | HEF4025BT | Triple 3-input NOR gate | NXP Semiconductors |
| 667244 | HEF4025BT | Triple 3-input NOR gate | Philips |
| 667245 | HEF4025BU | Triple 3-input NOR gate | Philips |
| 667246 | HEF4027 | Dual JK flip-flop | Philips |
| 667247 | HEF4027B | Dual JK flip-flop | Philips |
| 667248 | HEF4027BD | Dual JK flip-flop | Philips |
| 667249 | HEF4027BDB | Dual JK flip-flop | Philips |
| 667250 | HEF4027BF | Dual JK flip-flop | Philips |
| 667251 | HEF4027BN | Dual JK flip-flop | Philips |
| 667252 | HEF4027BP | Dual JK flip-flop | NXP Semiconductors |
| 667253 | HEF4027BP | Dual JK flip-flop | Philips |
| 667254 | HEF4027BPB | Dual JK flip-flop | Philips |
| 667255 | HEF4027BT | Dual JK flip-flop | Nexperia |
| 667256 | HEF4027BT | Dual JK flip-flop | NXP Semiconductors |
| 667257 | HEF4027BT | Dual JK flip-flop | Philips |
| 667258 | HEF4027BT-Q100 | Dual JK flip-flop | Nexperia |
| 667259 | HEF4027BT-Q100 | Dual JK flip-flop | NXP Semiconductors |
|
| 667260 | HEF4027BU | Dual JK flip-flop | Philips |
| 667261 | HEF4028B | 1-of-10 decoder | Philips |
| 667262 | HEF4028BD | 1-of-10 decoder | Philips |
| 667263 | HEF4028BDB | 1-of-10 decoder | Philips |
| 667264 | HEF4028BF | 1-of-10 decoder | Philips |
| 667265 | HEF4028BN | 1-of-10 decoder | Philips |
| 667266 | HEF4028BP | BCD to decimal decoder | NXP Semiconductors |
| 667267 | HEF4028BP | 1-of-10 decoder | Philips |
| 667268 | HEF4028BPB | 1-of-10 decoder | Philips |
| 667269 | HEF4028BT | BCD to decimal decoder | Nexperia |
| 667270 | HEF4028BT | BCD to decimal decoder | NXP Semiconductors |
| 667271 | HEF4028BT | 1-of-10 decoder | Philips |
| 667272 | HEF4028BU | 1-of-10 decoder | Philips |
| 667273 | HEF4029B | Synchronous up/down counter, binary/decade counter | Philips |
| 667274 | HEF4029BD | Synchronous up/down counter, binary/decade counter | Philips |
| 667275 | HEF4029BDB | Synchronous up/down counter, binary/decade counter | Philips |
| 667276 | HEF4029BF | Synchronous up/down counter, binary/decade counter | Philips |
| 667277 | HEF4029BN | Synchronous up/down counter, binary/decade counter | Philips |
| 667278 | HEF4029BP | Synchronous up/down counter, binary/decade counter | Philips |
| 667279 | HEF4029BPB | Synchronous up/down counter, binary/decade counter | Philips |
| 667280 | HEF4029BT | Synchronous up/down counter, binary/decade counter | Philips |
