BUY MC14029B https://www.utsource.net/itm/p/286912.html
Binary/Decade Up/Down Counter/ /
Description: Quad 2-Input Exclusive-OR Gate Features: - Low power Schottky TTL - Inputs compatible with standard TTL outputs - Outputs source/sink 24mA - Operating voltage range: 4.5V to 5.5V - Operating temperature range: -55°C to 125°C Applications: - Logic gating - Data transfer - Data comparison - Data encoding/decoding - Data multiplexing/demultiplexing (For reference only)