Am8253-5 Overview
The Am8253/Am8253-5 are programmable counter/timer chips designed for use as Am8080NAm8085A Family peripherals. They use NMOS technology with a single +5V supply and are direct replacements for Intel's 8253/8253-5. Each device is organized as three independent 16-bit counters, each counter having a rate of up to 2.5MHz.