CD54HCT175F3A

The Texas Instruments CD54HCT175F3A is a quad D-type flip-flop with master reset, fabricated in high-speed CMOS logic with TTL-compatible inputs. This device is housed in a hermetically sealed ceramic dual-in-line package (CDIP), enabling reliable operation across the full military temperature range of -55°C to +125°C. Each of the four flip-flops accepts a single data input and is triggered on the positive edge of a common clock, with a synchronous master reset that clears all outputs low regardless of clock state. The HCT family provides balanced propagation delays and low quiescent current, while its input thresholds are designed to interface directly with TTL logic levels without external level-shifting.

Typical applications include data storage registers, address latches, and control logic in high-reliability systems such as avionics flight computers, guided munitions, and satellite telemetry modules. The hermetically sealed CDIP construction mitigates moisture ingress and corrosion, making it suited for extended service in harsh environmental conditions. Procurement engineers should note that this mil-grade part is built to military specifications—likely processed to standards such as MIL-STD-883 or MIL-PRF-38535—and carries the traceability and documentation required for defense and aerospace programs. While high-reliability ceramic-packaged logic devices often have longer product life cycles than their commercial counterparts, checking with authorized distribution for current production status and lifecycle management is prudent given potential obsolescence in legacy military designs.