CD74HCT374M

Overview

The CD74HCT374M is an octal D-type flip-flop manufactured by Harris Corporation, belonging to the 74HCT logic series. It features a single element with eight bits per element, utilizing positive edge triggering for data capture. The device operates within a supply voltage range of 4.5V to 5.5V and supports a maximum clock frequency of 60 MHz. It exhibits a typical propagation delay of 33ns at 4.5V with a 50pF load. The outputs are three-state and non-inverting, capable of sourcing and sinking 6mA. Packaged in a 20-SOIC surface-mount format, it functions reliably across an operating temperature range of -55°C to 125°C.

Feature Summary

• Octal D-type configuration providing eight independent storage elements in a single package
• Three-state output capability allowing direct bus line interfacing without external buffers
• High-speed CMOS technology ensuring compatibility with TTL inputs while maintaining low power consumption
• Wide operating temperature range suitable for demanding industrial and commercial environments

Applications

• Parallel-to-serial data conversion circuits
• Shift register implementations for data transmission
• General-purpose memory storage in digital systems
• Timing and control logic applications requiring multiple flip-flops

Procurement Notes

Verify manufacturer authenticity as Harris Corporation was acquired; confirm current production status through authorized distributors. Check datasheet revisions for pinout consistency with legacy designs. Ensure compliance with RoHS directives if required by target application standards. Validate supply chain sources to avoid counterfeit components affecting reliability.

Selection Notes

Select this component when an octal D-latch with three-state outputs is required in a surface-mount package. Compare propagation delays against system timing requirements to ensure signal integrity. Consider alternative packages like DIP or TSSOP if board space constraints differ. Verify input threshold voltages match the driving logic family to prevent undefined states during operation.

Part Context

This part belongs to the widely adopted 74HCT logic family, bridging HC CMOS performance with TTL compatibility. It serves as a fundamental building block for sequential logic design. The SOIC-20 package offers a balance between pin count and board area efficiency. Its positive edge-triggered nature makes it distinct from level-sensitive latches, providing precise synchronization capabilities in synchronous digital circuits.

Replacement Considerations

Direct substitutes include Texas Instruments' CD74HCT374M and SN74HCT374M. These alternatives maintain identical logical functionality and pin configurations. Verify electrical parameters such as output current and propagation delay to ensure seamless integration into existing designs without circuit modification.