MD82C54/B

The MD82C54/B from Renesas Electronics is a CMOS programmable interval timer integrating three independent 16-bit down counters with six software-selectable operating modes, including rate generator, square-wave output, and one-shot pulse generation. Housed in a hermetically sealed ceramic dual-in-line package (CDIP), the device combines low-power static CMOS design with 5 V operation, allowing counter states to be maintained without a continuous clock. Input clock frequencies commonly extend to 8 MHz, and the programmable mode control word enables flexible configuration for interrupt generation, frequency division, and event counting in tightly constrained embedded timing architectures.

Typical deployments cover industrial automation, precision test instrumentation, and motor control, as well as defense and aerospace systems such as avionics timing modules, radar pulse synchronization, and satellite payload controllers where deterministic multi-channel counting is essential. The CDIP construction ensures robust thermal and mechanical resilience across full military temperature ranges, often from -55 °C to +125 °C, while the /B suffix frequently denotes a burn-in or screening flow aligned with MIL-STD-883 requirements, making the part suitable for high-reliability procurement. As a mature legacy component, the MD82C54/B benefits from Renesas’ extended product longevity programs, though obsolescence planning remains prudent; sourcing through franchised distribution with full chain-of-custody documentation is critical to meeting aerospace and defense qualification standards.