CD54HC374F3A

Overview

The CD54HC374F3A is a high-speed CMOS logic octal D-type flip-flop manufactured by Texas Instruments. It features eight independent positive-edge-triggered D-type flip-flops with three-state outputs, housed in a 20-lead ceramic dual in-line package (CDIP). The device operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range from -55°C to +125°C. Propagation delay is specified at 23 ns at 5 V with 50 pF load. Output drive capability includes ±7.8 mA low-level and -7.8 mA high-level currents. This component is designed for military and aerospace applications requiring wide temperature stability.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops per package
• Three-state outputs enabling direct bus connection without external buffers
• Positive-edge triggering synchronized by a single clock input
• Military-grade construction supporting extended temperature ranges

Applications

• Military and aerospace data storage systems
• High-reliability digital signal processing interfaces
• Ruggedized computer memory register arrays
• Industrial control system state retention modules

Procurement Notes

Verify the specific F3A suffix against current manufacturer documentation to confirm package type and qualification status. Ensure compatibility with existing board layouts for the 20-CDIP footprint. Check for availability constraints as this part may be subject to limited production runs or special order requirements. Confirm that the supplier provides traceability documentation required for regulated industries.

Selection Notes

Select this component when an octal D-type flip-flop with three-state outputs is required for high-speed CMOS logic applications. Consider the CD54HC374F3A for designs needing operation across extreme temperatures from -55°C to +125°C. Evaluate the 2 V to 6 V supply range against system power constraints. Compare propagation delays and output drive capabilities against other HC series alternatives if timing margins are tight.

Part Context

The CD54HC374F3A belongs to the Texas Instruments CD54HC family of high-speed CMOS logic devices. This family offers performance comparable to standard TTL logic but with lower power consumption and wider voltage tolerance. The CD54 prefix indicates military-grade qualification, distinguishing it from commercial variants like the SN74HC series. It serves as a core building block for sequential logic circuits in demanding environments.

Replacement Considerations

Public confirmed substitute part numbers: CD54HC374F3A, CD74HC374M96, SN74HC374N.