| 139921 | 74HC273N | Octal D-type flip-flop with reset; positive-edge trigger | NXP Semiconductors |
| 139922 | 74HC273N | 74HC/HCT273; Octal D-type flip-flop with reset; positive-edge trigger | Philips |
| 139923 | 74HC273NB | Octal D-type flip-flop with reset; positive-edge trigger | Philips |
| 139924 | 74HC273PW | Octal D-type flip-flop with reset; positive-edge trigger | Nexperia |
| 139925 | 74HC273PW | Octal D-type flip-flop with reset; positive-edge trigger | NXP Semiconductors |
| 139926 | 74HC273PW | 74HC/HCT273; Octal D-type flip-flop with reset; positive-edge trigger | Philips |
| 139927 | 74HC273PW-Q100 | Octal D-type flip-flop with reset; positive-edge trigger | Nexperia |
| 139928 | 74HC273PW-Q100 | Octal D-type flip-flop with reset; positive-edge trigger | NXP Semiconductors |
| 139929 | 74HC273U | Octal D-type flip-flop with reset; positive-edge trigger | Philips |
| 139930 | 74HC27BQ | Triple 3-input NOR gate | Nexperia |
| 139931 | 74HC27BQ | Triple 3-input NOR gate | NXP Semiconductors |
| 139932 | 74HC27BQ-Q100 | Triple 3-input NOR gate | Nexperia |
| 139933 | 74HC27BQ-Q100 | Triple 3-input NOR gate | NXP Semiconductors |
| 139934 | 74HC27D | Triple 3-input NOR gate | Nexperia |
| 139935 | 74HC27D | Triple 3-input NOR gate | NXP Semiconductors |
| 139936 | 74HC27D | 74HC/HCT27; Triple 3-input NOR gate | Philips |
| 139937 | 74HC27D-Q100 | Triple 3-input NOR gate | Nexperia |
| 139938 | 74HC27D-Q100 | Triple 3-input NOR gate | NXP Semiconductors |
| 139939 | 74HC27DB | Triple 3-input NOR gate | Nexperia |
|
| 139940 | 74HC27DB | Triple 3-input NOR gate | NXP Semiconductors |
| 139941 | 74HC27DB | 74HC/HCT27; Triple 3-input NOR gate | Philips |
| 139942 | 74HC27N | Triple 3-input NOR gate | NXP Semiconductors |
| 139943 | 74HC27N | 74HC/HCT27; Triple 3-input NOR gate | Philips |
| 139944 | 74HC27PW | Triple 3-input NOR gate | Nexperia |
| 139945 | 74HC27PW | Triple 3-input NOR gate | NXP Semiconductors |
| 139946 | 74HC27PW | 74HC/HCT27; Triple 3-input NOR gate | Philips |
| 139947 | 74HC27PW-Q100 | Triple 3-input NOR gate | Nexperia |
| 139948 | 74HC27PW-Q100 | Triple 3-input NOR gate | NXP Semiconductors |
| 139949 | 74HC280 | 9-bit odd/even parity generator/checker | Philips |
| 139950 | 74HC280D | 9-bit odd/even parity generator/checker | Nexperia |
| 139951 | 74HC280D | 9-bit odd/even parity generator/checker | NXP Semiconductors |
| 139952 | 74HC280D | 74HC/HCT280; 9-bit odd/even parity generator/checker | Philips |
| 139953 | 74HC280N | 9-bit odd/even parity generator/checker | NXP Semiconductors |
| 139954 | 74HC280N | 74HC/HCT280; 9-bit odd/even parity generator/checker | Philips |
| 139955 | 74HC280U | 9-bit odd/even parity generator/checker | Philips |
| 139956 | 74HC283 | 4-bit binary full adder with fast carry | Philips |
| 139957 | 74HC283D | 4-bit binary full adder with fast carry | NXP Semiconductors |
| 139958 | 74HC283D | 74HC283; 4-bit binary full adder with fast carry | Philips |
| 139959 | 74HC283DB | 4-bit binary full adder with fast carry | NXP Semiconductors |
| 139960 | 74HC283DB | 74HC283; 4-bit binary full adder with fast carry | Philips |
