| 1480521 | SN74LS20N | Dual 4-input positive-NAND gates | Texas Instruments |
| 1480522 | SN74LS20N3 | Dual 4-input positive-NAND gates | Texas Instruments |
| 1480523 | SN74LS20NE4 | Dual 4-input positive-NAND gates 14-PDIP 0 to 70 | Texas Instruments |
| 1480524 | SN74LS20NSR | Dual 4-input positive-NAND gates | Texas Instruments |
| 1480525 | SN74LS21 | Dual 4-input positive-AND gates | Texas Instruments |
| 1480526 | SN74LS21D | DUAL 4-INPUT AND GATE | Motorola |
| 1480527 | SN74LS21D | Dual 4-input positive-AND gates | Texas Instruments |
| 1480528 | SN74LS21DR | Dual 4-input positive-AND gates | Texas Instruments |
| 1480529 | SN74LS21DRG4 | Dual 4-input positive-AND gates 14-SOIC 0 to 70 | Texas Instruments |
| 1480530 | SN74LS21N | DUAL 4-INPUT AND GATE | Motorola |
| 1480531 | SN74LS21N | Dual 4-input positive-AND gates | Texas Instruments |
| 1480532 | SN74LS21N3 | Dual 4-input positive-AND gates | Texas Instruments |
| 1480533 | SN74LS21NE4 | Dual 4-input positive-AND gates 14-PDIP 0 to 70 | Texas Instruments |
| 1480534 | SN74LS21NSR | Dual 4-input positive-AND gates | Texas Instruments |
| 1480535 | SN74LS22 | DUAL 4 INPUT POSITIVE NAND GATES WITH OPEN COLLECTOR OUTPUTS | Texas Instruments |
| 1480536 | SN74LS221 | LOW POWER SCHOTTKY | ON Semiconductor |
| 1480537 | SN74LS221 | Dual monostable multivibrators with Schmitt-trigger inputs | Texas Instruments |
| 1480538 | SN74LS221-D | Dual Monostable Multivibrators with Schmitt-Trigger Inputs | ON Semiconductor |
| 1480539 | SN74LS221D | DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS | Motorola |
|
| 1480540 | SN74LS221D | LOW POWER SCHOTTKY | ON Semiconductor |
| 1480541 | SN74LS221D | Dual monostable multivibrators with Schmitt-trigger inputs | Texas Instruments |
| 1480542 | SN74LS221DB | DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS | Texas Instruments |
| 1480543 | SN74LS221DBR | Dual monostable multivibrators with Schmitt-trigger inputs | Texas Instruments |
| 1480544 | SN74LS221DG4 | Dual monostable multivibrators with Schmitt-trigger inputs 16-SOIC 0 to 70 | Texas Instruments |
| 1480545 | SN74LS221DR | Dual monostable multivibrators with Schmitt-trigger inputs | Texas Instruments |
| 1480546 | SN74LS221DR2 | Dual Monostable Multivibrators With Schmitt-Trigger Inputs | ON Semiconductor |
| 1480547 | SN74LS221DRE4 | Dual monostable multivibrators with Schmitt-trigger inputs 16-SOIC 0 to 70 | Texas Instruments |
| 1480548 | SN74LS221M | Dual Monostable Multivibrators With Schmitt-Trigger Inputs | ON Semiconductor |
| 1480549 | SN74LS221MEL | Dual Monostable Multivibrators With Schmitt-Trigger Inputs | ON Semiconductor |
| 1480550 | SN74LS221ML1 | Dual Monostable Multivibrators With Schmitt-Trigger Inputs | ON Semiconductor |
| 1480551 | SN74LS221ML2 | Dual Monostable Multivibrators With Schmitt-Trigger Inputs | ON Semiconductor |
| 1480552 | SN74LS221N | DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS | Motorola |
| 1480553 | SN74LS221N | LOW POWER SCHOTTKY | ON Semiconductor |
| 1480554 | SN74LS221N | Dual monostable multivibrators with Schmitt-trigger inputs | Texas Instruments |
| 1480555 | SN74LS221N3 | Dual monostable multivibrators with Schmitt-trigger inputs | Texas Instruments |
| 1480556 | SN74LS221NE4 | Dual monostable multivibrators with Schmitt-trigger inputs 16-PDIP 0 to 70 | Texas Instruments |
| 1480557 | SN74LS221NSR | Dual monostable multivibrators with Schmitt-trigger inputs | Texas Instruments |
| 1480558 | SN74LS224A | 16 4 SYNCHRONOUS FIRST-IN / FIRST-OUT MEMORY WITH 3-STATE OUTPUTS | Texas Instruments |
| 1480559 | SN74LS224AN | 16 4 SYNCHRONOUS FIRST-IN / FIRST-OUT MEMORY WITH 3-STATE OUTPUTS | Texas Instruments |
| 1480560 | SN74LS224AN3 | 16 X 4 SYNCHRONOUS FIFO MEMORY | Texas Instruments |
