| 666961 | HEF4011BP | Quad 2-input NAND gate | NXP Semiconductors |
| 666962 | HEF4011BP | Quadruple 2-input NAND gate | Philips |
| 666963 | HEF4011BT | Quad 2-input NAND gate | Nexperia |
| 666964 | HEF4011BT | Quad 2-input NAND gate | NXP Semiconductors |
| 666965 | HEF4011BT | Quadruple 2-input NAND gate | Philips |
| 666966 | HEF4011BT-Q100 | Quad 2-input NAND gate | Nexperia |
| 666967 | HEF4011BT-Q100 | Quad 2-input NAND gate | NXP Semiconductors |
| 666968 | HEF4011UB | Quadruple 2-input NAND gate | Philips |
| 666969 | HEF4011UBD | Quadruple 2-input NAND gate | Philips |
| 666970 | HEF4011UBF | Quadruple 2-input NAND gate | Philips |
| 666971 | HEF4011UBN | Quadruple 2-input NAND gate | Philips |
| 666972 | HEF4011UBP | Quadruple 2-input NAND gate | NXP Semiconductors |
| 666973 | HEF4011UBP | Quadruple 2-input NAND gate | Philips |
| 666974 | HEF4011UBT | Quadruple 2-input NAND gate | NXP Semiconductors |
| 666975 | HEF4011UBT | Quadruple 2-input NAND gate | Philips |
| 666976 | HEF4012B | Dual 4-input NAND gate | Philips |
| 666977 | HEF4012BD | Dual 4-input NAND gate | Philips |
| 666978 | HEF4012BF | Dual 4-input NAND gate | Philips |
| 666979 | HEF4012BN | Dual 4-input NAND gate | Philips |
|
| 666980 | HEF4012BP | Dual 4-input NAND gate | Philips |
| 666981 | HEF4012BT | Dual 4-input NAND gate | Philips |
| 666982 | HEF4013 | Dual D-type flip-flop | Philips |
| 666983 | HEF4013B | Dual D-type flip-flop | Philips |
| 666984 | HEF4013BD | Dual D-type flip-flop | Philips |
| 666985 | HEF4013BDB | Dual D-type flip-flop | Philips |
| 666986 | HEF4013BF | Dual D-type flip-flop | Philips |
| 666987 | HEF4013BN | Dual D-type flip-flop | Philips |
| 666988 | HEF4013BP | Dual D-type flip-flop | NXP Semiconductors |
| 666989 | HEF4013BP | Dual D-type flip-flop | Philips |
| 666990 | HEF4013BPB | Dual D-type flip-flop | Philips |
| 666991 | HEF4013BT | Dual D-type flip-flop | Nexperia |
| 666992 | HEF4013BT | Dual D-type flip-flop | NXP Semiconductors |
| 666993 | HEF4013BT | Dual D-type flip-flop | Philips |
| 666994 | HEF4013BT-Q100 | Dual D-type flip-flop | Nexperia |
| 666995 | HEF4013BT-Q100 | Dual D-type flip-flop | NXP Semiconductors |
| 666996 | HEF4013BTS | Dual D-type flip-flop | Philips |
| 666997 | HEF4013BTT | Dual D-type flip-flop | Nexperia |
| 666998 | HEF4013BTT | Dual D-type flip-flop | NXP Semiconductors |
| 666999 | HEF4013BTT-Q100 | Dual D-type flip-flop | Nexperia |
| 667000 | HEF4013BTT-Q100 | Dual D-type flip-flop | NXP Semiconductors |
