CD54HCT4040F3A

The Texas Instruments CD54HCT4040F3A is a high-speed CMOS 12-stage binary ripple counter supplied in a ceramic dual-in-line package (CDIP), built for high-reliability environments that demand TTL-compatible inputs and low power dissipation across extreme temperatures. It provides a 12-bit asynchronous binary count sequence with buffered outputs Q1 through Q12 and incorporates an asynchronous master reset that clears all stages when asserted. Operating from a nominal 5 V supply within the standard HCT 4.5 V to 5.5 V range, the device achieves typical toggle rates in the tens of megahertz while maintaining microampere-level quiescent current, and the fully hermetic CDIP package delivers the mechanical and environmental integrity required for long-duration mission profiles.

This counter serves frequency division, time-base generation, event counting, and clock distribution functions inside defense avionics, radar processing chains, guidance and navigation systems, and high-reliability industrial instrumentation. The CD54 prefix confirms a military temperature range of −55 °C to +125 °C and production testing aligned with the manufacturer’s stringent high-reliability flows, typically reflecting MIL-STD-883 screening benchmarks. As a mature CMOS logic family, CD54HCT devices fall under Texas Instruments’ lifecycle management process; while many military part numbers remain active, procurement specialists should verify current production status and anticipate potential long lead times or end-of-life transitions. Securing components through authorized, traceable channels is essential to guarantee authenticity, date-code integrity, and full conformance to military-grade specifications.