The Intersil 82C54 is a high performance CMOS Programmable Interval Timer manufactured using an advanced 2 micron CMOS process.
The 82C54 programmable interval timer is a high‑performance CMOS device featuring three independent 16‑bit counters, six programmable modes, and binary or BCD counting. It is fully TTL compatible, operates from a single 5 V supply, and offers low power consumption.
The device is offered in several packages (PDIP, PLCC, CERDIP, SOIC) with temperature ranges from 0 °C up to +125 °C depending on the package. Detailed pin descriptions, functional diagrams, and programming instructions are provided for system integration.
| Clock Input Frequency | 8 MHz to 12 MHz |
|---|---|
| Power Supply | Single 5 V |
| Operating Temperature Range | 0 °C to +70 °C (PDIP), -40 °C to +85 °C (PLCC), -55 °C to +125 °C (CERDIP) |
| Package Types | 24‑lead PDIP, 28‑lead PLCC, 24‑lead CERDIP, 24‑lead SOIC |
| Number of Counters | Three independent 16‑bit counters |
| Programmable Modes | Six programmable counter modes |
The device accepts clock inputs from 8 MHz up to 12 MHz.
It contains three independent counters, each 16 bits wide.
Depending on the package, the temperature range is 0 °C to +70 °C, -40 °C to +85 °C, or -55 °C to +125 °C.
The timer is offered in 24‑lead PDIP, 28‑lead PLCC, 24‑lead CERDIP, and 24‑lead SOIC packages.