BUY P8253 https://www.utsource.net/itm/p/955488.html
PROGRAMMABLE INTERVAL TIMER
The P8253 is an 8-bit programmable interval timer from AMD. It is a 24-pin DIP package and is designed for use in microprocessor-based systems. Description: The P8253 is a programmable interval timer designed for use in microprocessor-based systems. It is an 8-bit counter/timer with three independent 16-bit programmable registers. It provides three independent 16-bit programmable registers that can be used to generate interrupts at predetermined intervals. Features: 8-bit programmable interval timer 24-pin DIP package Three independent 16-bit programmable registers Programmable interrupt generation Low power consumption High speed operation Applications: The P8253 is suitable for use in microprocessor-based systems. It can be used to generate interrupts at predetermined intervals, and is suitable for use in applications such as time-critical tasks, real-time clock applications, and event counting. (For reference only)