| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | DM74LS194A |  166Kb/8P | 4-Bit Bidirectional Universal Shift Register |
 National Semiconductor ... | DM74LS194AM |  166Kb/8P | 4-Bit Bidirectional Universal Shift Register |
 National Semiconductor ... | DM74LS194AN |  166Kb/8P | 4-Bit Bidirectional Universal Shift Register |
 National Semiconductor ... | DM74LS194AM |  166Kb/8P | 4-Bit Bidirectional Universal Shift Register |
 National Semiconductor ... | DM74LS194AN |  166Kb/8P | 4-Bit Bidirectional Universal Shift Register |
 National Semiconductor ... | DM74LS190 |  174Kb/8P | Synchronous 4-Bit Up/Down Counters with Mode Control |
| DM74LS190M |  174Kb/8P | Synchronous 4-Bit Up/Down Counters with Mode Control |
| DM74LS190N |  174Kb/8P | Synchronous 4-Bit Up/Down Counters with Mode Control |
 National Semiconductor ... | DM74LS191 |  174Kb/8P | Synchronous 4-Bit Up/Down Counters with Mode Control |