CD74HC257M

Overview

The CD74HC257M is a high-speed CMOS quad 2-input multiplexer manufactured by Harris Corporation. It operates within a supply voltage range of 2V to 6V and features buffered inputs with a typical propagation delay of 12ns at VCC = 5V. The device utilizes a 16-SOIC surface-mount package and supports complementary outputs. It is designed for applications requiring efficient data selection in digital systems.

Feature Summary

• Quad configuration providing four independent 2-to-1 multiplexing channels
• High-speed CMOS technology ensuring low power consumption and fast switching
• Buffered inputs to maintain signal integrity and reduce loading effects

Applications

• Data routing in digital communication systems
• Signal selection in microprocessor-based control circuits
• Address decoding and bus switching applications

Procurement Notes

Verify component authenticity as the manufacturer, Harris Corporation, may have undergone corporate restructuring or acquisition. Confirm that the specific suffix 'M' denotes the SOIC package variant. Check for RoHS compliance status as older Harris Semiconductor products often lack modern environmental certifications. Ensure the source provides valid traceability documentation for critical electronic assemblies.

Selection Notes

Select this component when a compact, multi-channel data selector is required for low-voltage logic interfaces. The 16-SOIC package suits automated surface-mount assembly processes. Consider the 2V to 6V operating range for compatibility with various logic families. Evaluate the 12ns propagation delay against system timing requirements to ensure adequate performance margins.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices originally produced by Harris Semiconductor. The CD74HC257M specifically implements quad 2-input multiplexing functionality. Harris Corporation's semiconductor division was later acquired by Texas Instruments, which continues to support related logic families. This component represents legacy industrial-grade digital logic design.

Replacement Considerations

CD74HC257M (Texas Instruments equivalent)

FAQ

What is the typical propagation delay for the CD74HC257M?

The typical propagation delay is 12ns when operating at a supply voltage of 5V with a capacitive load of unspecified standard conditions.

Does the CD74HC257M feature buffered inputs?

Yes, the datasheet specifies that the device includes buffered inputs to improve noise immunity and drive capability.