| Manufacturer | Part Number | Description |
|---|---|---|
National Semiconductor (now Texas Instruments) |
54LS21 | Dual 4-Input AND Gates |
Texas Instruments |
SN54LS21 | DUAL 4-INPUT POSITIVE-AND GATE |
Motorola Semiconductor (now NXP Semiconductors) |
54LS21 | DUAL 4-INPUT AND GATE |
|
National Semiconductor (now Texas Instruments) |
DM54LS21 | Dual 4-Input AND Gates |
Motorola Semiconductor (now NXP Semiconductors) |
SN54LS21 | DUAL 4-INPUT AND GATE |
| Unknown Manufacturer | GD54LS21 | DUAL 4-INPUT POSITIVE AND GATES |
