74HC191D is Presettable synchronous 4-bit binary up/down counter manufactured by Nexperia.
| Manufacturer | Part Number | Description |
|---|---|---|
Texas Instruments |
74HC191 | 4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS |
STMicroelectronics |
74HC191 | 4-BIT SYNCHRONOUS UP/DOWN COUNTERS |
National Semiconductor |
74HC191 | Synchronous Binary Up/Down Counters |
NXP Semiconductors |
74HC191 | Presettable synchronous 4-bit binary up/down counter |
The 74HC191 is an asynchronously presettable 4-bit binary up/down counter. It contains four master/slave flip-flops with internal gating and steering logic to provide asynchronous preset and synchronous count-up and count-down operation. Asynchronous parallel load capability permits the counter to be preset to any desired value.
