| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | 74F192SC |  193Kb/10P | Up/Down Decade Counter with Separate Up/Down Clocks |
 National Semiconductor ... | 74F192SJ |  193Kb/10P | Up/Down Decade Counter with Separate Up/Down Clocks |
 National Semiconductor ... | 74F192PC |  193Kb/10P | Up/Down Decade Counter with Separate Up/Down Clocks |
 National Semiconductor ... | 74F190 |  178Kb/10P | Up/Down Decade Counter with Preset and Ripple Clock |
 National Semiconductor ... | 74F190PC |  178Kb/10P | Up/Down Decade Counter with Preset and Ripple Clock |
 National Semiconductor ... | 74F190SC |  178Kb/10P | Up/Down Decade Counter with Preset and Ripple Clock |
 National Semiconductor ... | 74F191 |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
 National Semiconductor ... | 74F191 |  196Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191DCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |