| SN54ALS191A | Texas Instruments | Synchronous 4-Bit Up/Down Binary Counter |
| 5962-86840012A | Texas Instruments | Synchronous 4-Bit Up/Down Binary Counter |
| 5962-8684001EA | Texas Instruments | Synchronous 4-Bit Up/Down Binary Counter |
| 5962-8684001FA | Texas Instruments | Synchronous 4-Bit Up/Down Binary Counter |
| SN54ALS191AJ | Texas Instruments | Synchronous 4-Bit Up/Down Binary Counter |
| SNJ54ALS191AFK | Texas Instruments | Synchronous 4-Bit Up/Down Binary Counter |
| SNJ54ALS191AJ | Texas Instruments | Synchronous 4-Bit Up/Down Binary Counter |
| SNJ54ALS191AW | Texas Instruments | Synchronous 4-Bit Up/Down Binary Counter |
| SN74ALS191A | Texas Instruments | 4-Bit Synchronous Up/Down Binary Counters |
| SN74ALS191AD | Texas Instruments | 4-Bit Synchronous Up/Down Binary Counters |
| SN74ALS191ADR | Texas Instruments | 4-Bit Synchronous Up/Down Binary Counters |
| SN74ALS191AN | Texas Instruments | 4-Bit Synchronous Up/Down Binary Counters |
| SN74ALS191ANSR | Texas Instruments | 4-Bit Synchronous Up/Down Binary Counters |