| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | 74F191SCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
 National Semiconductor ... | 74F191SCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191SC |  196Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
 National Semiconductor ... | 74F191SJ |  196Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
 National Semiconductor ... | 74F191SJCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191SJCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191SJMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191SJMX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191SMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191SMX |  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 |