CD54HC259F3A

The Texas Instruments CD54HC259F3A is a high-speed CMOS 8-bit addressable latch from the 54HC logic family, designed for data storage, routing, and demultiplexing in digital systems. Fabricated in silicon-gate CMOS technology, it combines the low power consumption of standard CMOS with operating speeds comparable to LSTTL, while maintaining a wide supply voltage range and excellent noise immunity. The device features a single data input, eight outputs, and three address lines, allowing a 3-to-8 line demultiplexing function with an active-low enable and latching capability. Packaged in a hermetic ceramic dual-in-line (CDIP) package, this part offers robust environmental protection, making it suitable for operation across extended temperature ranges and in high-reliability environments where thermal stress and contamination must be mitigated.

Typical applications include military and aerospace guidance systems, avionics control units, and ruggedized industrial controllers where deterministic address decoding, register file expansion, or status flag storage are required. It is also deployed in defense communication payloads and test equipment that demand long-term availability of radiation-tolerant or extended-temperature logic. As a member of Texas Instruments’ 54HC military-grade portfolio, the CD54HC259F3A adheres to stringent manufacturing and screening standards, reducing procurement risk for programs requiring QML or similar certifications. Procurement professionals should evaluate lifecycle status carefully, as mature logic families may face obsolescence, and source only through authorized distribution channels to avoid counterfeit or non-conforming material in safety- and mission-critical supply chains.