| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | 54LS283 |  158Kb/8P | 4-Bit Binary Adders with Fast Carry |
| 54LS283DMQB |  158Kb/8P | 4-Bit Binary Adders with Fast Carry |
| 54LS283FMQB |  158Kb/8P | 4-Bit Binary Adders with Fast Carry |
| 54LS283LMQB |  158Kb/8P | 4-Bit Binary Adders with Fast Carry |
 National Semiconductor ... | 54LS283DMQB |  158Kb/8P | 4-Bit Binary Adders with Fast Carry |
| 54LS283FMQB |  158Kb/8P | 4-Bit Binary Adders with Fast Carry |
| 54LS283LMQB |  158Kb/8P | 4-Bit Binary Adders with Fast Carry |
| 54LS20 |  124Kb/6P | Dual 4-Input NAND Gates |
 National Semiconductor ... | 54LS20DMQB |  124Kb/6P | Dual 4-Input NAND Gates |
| 54LS20FMQB |  124Kb/6P | Dual 4-Input NAND Gates |
 National Semiconductor ... | 54LS20LMQB |  124Kb/6P | Dual 4-Input NAND Gates |
| 54LS21 |  120Kb/6P | Dual 4-Input AND Gates |
 National Semiconductor ... | 54LS22 |  50Kb/3P | DUAL 4-INPUT NAND GATE (WITH OPEN-COLLECTOR OUTPUT) |
| 54LS22DMQB |  50Kb/3P | DUAL 4-INPUT NAND GATE (WITH OPEN-COLLECTOR OUTPUT) |
| 54LS22FMQB |  50Kb/3P | DUAL 4-INPUT NAND GATE (WITH OPEN-COLLECTOR OUTPUT) |