| 制造商 | 部件名 | 数据表 | 功能描述 |
 National Semiconductor ... | 54F191FM |  196Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191FMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191FMX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
 National Semiconductor ... | 54F191FCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191FCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191FMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191FMX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191DCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191DCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191DM |  196Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191DMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191DMX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191LCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191LCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191LM |  196Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191LMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191LMX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191PCQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191PCX |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191PMQB |  175Kb/10P | Up/Down Binary Counter with Preset and Ripple Clock |