| 54F191 | National Semiconductor | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191LMQB | National Semiconductor | Up/Down Binary Counter with Preset and Ripple Clock |
| 5962-9058201EA(54F191DMQB) | National Semiconductor | Up/Down Binary Counter with Preset and Ripple Clock |
| 54F191FMQB | National Semiconductor | Up/Down Binary Counter with Preset and Ripple Clock |