54F174DM

Overview

The 54F174DM is a hex D-type flip-flop manufactured by National Semiconductor, belonging to the F/FAST logic series. It features six independent positive-edge-triggered D flip-flops with true outputs and an active-low master reset input. The device utilizes TTL technology and is housed in a 16-pin ceramic dual in-line package (DIP). It operates within a supply voltage range of 4.5V to 5.5V, with a nominal voltage of 5V. The component supports a maximum operating frequency of 100 MHz at nominal supply conditions and exhibits a propagation delay of 8.5 ns. It functions reliably across a military-grade temperature range from -55°C to 125°C.

Feature Summary

• Contains six independent D-type flip-flops with true outputs
• Features a common active-low master reset input for synchronous clearing
• Positive-edge triggering ensures data capture on clock transitions
• Military-grade construction using metal-sealed ceramic packaging

Applications

• High-speed digital data storage registers
• Parallel-to-serial conversion circuits
• State machine implementation in military systems
• Frequency division and counting applications

Procurement Notes

Verify that the specific ordering suffix corresponds to the ceramic DIP variant rather than plastic or surface-mount packages. Confirm the presence of the military temperature rating and lead finish specifications required for defense or aerospace procurement. Ensure documentation matches the National Semiconductor or Texas Instruments lineage for authenticity.

Selection Notes

Select this component when high-speed switching and radiation-hardened reliability are required. The F/FAST series offers superior speed compared to LS or standard TTL families. Consider the 16-pin ceramic DIP form factor for through-hole mounting in ruggedized environments where thermal stability and hermetic sealing are critical design constraints.

Part Context

This part belongs to the 54xx series of military-grade logic integrated circuits. The 'F' designation indicates the FAST logic family, providing faster switching speeds than standard TTL. As a hex flip-flop, it serves as a fundamental building block for sequential logic circuits requiring multiple bits of storage within a single package.

Replacement Considerations

Equivalent parts include the 54F174FMQB and other 54F174 variants from manufacturers such as Motorola or Fairchild. Verify pinout compatibility and electrical characteristics before substitution.