BUY 74LS191 https://www.utsource.net/itm/p/98268.html
Synchronous Up/down 4-bit Binary Counters(single Clock Line)
Description: The 74LS191 is a 4-bit synchronous up/down counter with an asynchronous reset.
Features:
- Synchronous up/down counting
- Asynchronous reset
- Ripple carry output
- High speed
Applications:
- Frequency division
- Event counting
- Pulse generation
- Timing
(For reference only)
