CD54HC574F

Overview

The CD54HC574F is a high-speed CMOS logic octal positive-edge triggered D-type flip-flop with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and features an operating temperature range from -55°C to 125°C. The device provides a propagation delay time of 165 ns, with high-level output current of -7.8 mA and low-level output current of 7.8 mA. It is housed in a 20-pin ceramic dual in-line package (CDIP).

Feature Summary

• Octal configuration containing eight independent D-type flip-flops for parallel data storage.
• Positive-edge triggering mechanism synchronized by clock input signals.
• Three-state outputs allowing controlled bus driving and isolation.

Applications

• High-reliability military aerospace digital systems requiring extended temperature tolerance.
• Industrial control applications demanding operation across extreme thermal environments.
• Complex digital data storage circuits utilizing parallel input/output architectures.

Procurement Notes

Verify the specific manufacturer source when sourcing this component, as historical documentation lists Thomson Consumer Electronics alongside Texas Instruments. Confirm that the received unit matches the exact CD54HC574F designation and utilizes the standard 20-lead ceramic dual in-line package. Ensure compliance with the specified -55°C to 125°C operating temperature range requirements for your intended deployment environment before finalizing acquisition.

Selection Notes

Select this component when designing systems requiring robust performance under severe thermal conditions beyond standard commercial limits. The HC series technology ensures compatibility with standard CMOS logic levels while providing sufficient drive capability for moderate loads. Consider the ceramic packaging benefits for long-term stability in harsh environments compared to plastic alternatives.

Part Context

This part belongs to the SN74HC574N family of octal D-type flip-flops. While functionally similar to other variants like the SN74HC574NE4, the CD54HC574F specifically denotes the military-grade version characterized by its wider temperature range and ceramic construction. It serves as a critical memory element in high-speed sequential logic designs.

Replacement Considerations

The SN74HC574N is a commercially rated equivalent offering identical logical functionality but limited to a -40°C to 85°C operating range. For direct replacement in non-critical applications, verify that the reduced temperature tolerance does not compromise system reliability.