| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | 74F191PC |  196Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
 National Semiconductor ... | 74F191PCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191PCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
 National Semiconductor ... | 74F191PCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191PCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191PMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191PMX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191DCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191DCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191DMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191DMX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191FCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191FCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191FMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191FMX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191LCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191LCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191LMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |