74F191 Description
The 74F191 is a 4-bit binary counter. It contains four edge-triggered master/slave flip-flops with internal gating and steering logic to provide asynchronous preset and synchronous count-up and count-down operations. Asynchronous parallel load capability permits the counter to be preset to any desired number.
74F191 Key Features
- High speed -125MHz typical fMAX
- Synchronous, reversible counting
- 4-Bit binary
- Asynchronous parallel load capability
- Cascadable without external logic
- Single up/down control input
- D3) is loaded into the counter and appears on the outputs when the Parallel Load (PL) input is Low. This operation overr