BUY 74LS193N https://www.utsource.net/itm/p/1704524.html
Description: 4-Bit Binary Counter
Features:
- Synchronous operation
- Counts up or down
- Counts up to 15
- Ripple carry output
- Low power Schottky
- Inputs and outputs fully buffered
- Outputs source/sink 24 mA
Application:
- Frequency division
- Event counting
- Timing applications
- Data handling applications
(For reference only)