ID82C54

The Renesas Electronics ID82C54 is a CMOS programmable interval timer that implements three independent 16-bit counter/timer channels in a single device, each capable of operating in one of six software-selectable modes including interrupt-on-terminal-count, hardware-retriggerable one-shot, rate generator, square-wave generator, software-triggered strobe, and hardware-triggered strobe. Fabricated in high-speed CMOS technology, the part supports clock input frequencies up to 10 MHz while maintaining low dynamic power dissipation typical of the 82C54 family. The counters are fully binary or BCD programmable, with separate read-back command capability for status and count values, enabling flexible system integration without disrupting ongoing timer operations.

This timer is deployed in a wide range of embedded systems requiring precise timing control, such as programmable frequency dividers, real-time clocks, event counters, and pulse-width modulation generators for industrial automation, avionics, and defense electronics. The ID82C54 is housed in a ceramic dual-in-line (CDIP) package, which provides superior thermal and environmental resilience compared to plastic alternatives, making it suitable for high-reliability industrial environments. Procurement engineers should note that the ID prefix designates an industrial temperature range device (-40°C to +85°C), and while Renesas continues to support legacy 82C54-based designs, the part’s mature process node can introduce long lead times or eventual obsolescence risks. Systems requiring full military-grade qualification should cross-reference the MIL-STD-883 compliant M82C54 variant, though the ceramic construction of the ID82C54 still offers a robust alternative for non-qualified high-reliability applications.