| 667961 | HEF4538BT | Dual precision monostable multivibrator | Nexperia |
| 667962 | HEF4538BT | Dual precision monostable multivibrator | NXP Semiconductors |
| 667963 | HEF4538BT | Dual precision monostable multivibrator | Philips |
| 667964 | HEF4538BT-Q100 | Dual precision monostable multivibrator | Nexperia |
| 667965 | HEF4538BT-Q100 | Dual precision monostable multivibrator | NXP Semiconductors |
| 667966 | HEF4538BU | Dual precision monostable multivibrator | Philips |
| 667967 | HEF4539B | Dual 4-input multiplexer | Philips |
| 667968 | HEF4539BD | Dual 4-input multiplexer | Philips |
| 667969 | HEF4539BF | Dual 4-input multiplexer | Philips |
| 667970 | HEF4539BN | Dual 4-input multiplexer | Philips |
| 667971 | HEF4539BP | Dual 4-input multiplexer | Philips |
| 667972 | HEF4539BT | Dual 4-input multiplexer | Philips |
| 667973 | HEF4541B | Programmable timer | Philips |
| 667974 | HEF4541BD | Programmable timer | Philips |
| 667975 | HEF4541BDB | Programmable timer | Philips |
| 667976 | HEF4541BF | Programmable timer | Philips |
| 667977 | HEF4541BN | Programmable timer | Philips |
| 667978 | HEF4541BP | Programmable timer | NXP Semiconductors |
| 667979 | HEF4541BP | Programmable timer | Philips |
|
| 667980 | HEF4541BPB | Programmable timer | Philips |
| 667981 | HEF4541BT | Programmable timer | Nexperia |
| 667982 | HEF4541BT | Programmable timer | NXP Semiconductors |
| 667983 | HEF4541BT | Programmable timer | Philips |
| 667984 | HEF4541BT-Q100 | Programmable timer | Nexperia |
| 667985 | HEF4541BT-Q100 | Programmable timer | NXP Semiconductors |
| 667986 | HEF4541BU | Programmable timer | Philips |
| 667987 | HEF4543B | BCD to 7-segment latch/decoder/driver | Philips |
| 667988 | HEF4543BD | BCD to 7-segment latch/decoder/driver | Philips |
| 667989 | HEF4543BDB | BCD to 7-segment latch/decoder/driver | Philips |
| 667990 | HEF4543BF | BCD to 7-segment latch/decoder/driver | Philips |
| 667991 | HEF4543BN | BCD to 7-segment latch/decoder/driver | Philips |
| 667992 | HEF4543BP | BCD to 7-segment latch/decoder/driver | NXP Semiconductors |
| 667993 | HEF4543BP | BCD to 7-segment latch/decoder/driver | Philips |
| 667994 | HEF4543BPB | BCD to 7-segment latch/decoder/driver | Philips |
| 667995 | HEF4543BT | BCD to 7-segment latch/decoder/driver | Nexperia |
| 667996 | HEF4543BT | BCD to 7-segment latch/decoder/driver | NXP Semiconductors |
| 667997 | HEF4543BT | BCD to 7-segment latch/decoder/driver | Philips |
| 667998 | HEF4543BU | BCD to 7-segment latch/decoder/driver | Philips |
| 667999 | HEF4555B | Dual 1-of-4 decoder/demultiplexer | Philips |
| 668000 | HEF4555BD | Dual 1-of-4 decoder/demultiplexer | Philips |
