| Компонент | Описание | Производитель | |
| SN74ALS191A | SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTERS |
Texas Instruments |
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| SN74ALS191AD | SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTERS |
Texas Instruments |
|
| SN74ALS191ADR | 4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS |
Texas Instruments |
|
| SN74ALS191AN | SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTERS |
Texas Instruments |