| Компонент | Описание | Производитель | |
| PI74FCT191T | High Speed CMOS Presettable Synchronous 4-Bit Binary Counters |
Pericom Semiconductor Corporation |
|
| PI74FCT191TQ | High speed CMOS presettable synchronous 4-bit binary counter |
Pericom Semiconductor Corporation |
|
| PI74FCT191TS | High speed CMOS presettable synchronous 4-bit binary counter |
Pericom Semiconductor Corporation |