This document mainly introduces the characteristics of Intersil 82C54 high performance CMOS programmable timer.
The 82C54 is a CMOS programmable interval timer designed for microcomputer systems. It provides three independent 16‑bit counters that can be programmed for a variety of timing functions such as real‑time clock, event counting, one‑shot pulses, and waveform generation.
The device operates from a single 5 V supply, supports clock inputs from 8 MHz to 12 MHz, and is available in multiple package types (PDIP, PLCC, CERDIP) with temperature ratings from –55 °C to +125 °C. Detailed electrical specifications, pin descriptions, and programming sequences are provided in the document.
| Clock Input Frequency | 8 MHz to 12 MHz |
|---|---|
| Number of Counters | Three independent 16‑bit counters |
The device supports clock inputs up to 12 MHz.
It provides three independent 16‑bit counters.