CD74HC157M

Overview

The CD74HC157M is a high-speed CMOS quad 2-input multiplexer manufactured by Harris Corporation. It operates within a voltage range of 2V to 6V and features four independent data selectors controlled by a common select input. The device provides true (non-inverted) outputs and includes an active-low enable input that forces all outputs low when asserted. Packaged in a 16-pin Small Outline Package (SOP), it supports operation temperatures from -40°C to 85°C with a load capacitance of 50 pF.

Feature Summary

• Integrates four independent 2-to-1 data selectors within a single package
• Provides non-inverted output signals for direct logic interfacing
• Features a common select input to synchronize channel switching across all channels

Applications

• Routing data between two register banks to a common bus
• Implementing variable logic functions via data selection
• Configuring function generators in digital test equipment

Procurement Notes

Verify the specific suffix 'M' against the manufacturer's current datasheet to confirm the exact package variant and temperature grade. Confirm RoHS compliance status, as older Harris production runs may not meet current environmental directives. Ensure the supply source provides valid traceability documentation for this discontinued component series.

Selection Notes

Select this component when a quad multiplexer with non-inverted outputs is required for 2V to 6V CMOS applications. It serves as a functional equivalent to standard 74HC157 devices but requires verification of pinout compatibility with existing PCB layouts. Consider the SOP package constraints for thermal management and board space availability.

Part Context

This part belongs to the Harris 74HC logic family, designed for compatibility with Low-Power Schottky TTL (LSTTL) systems. Harris Corporation was a prominent semiconductor manufacturer before its acquisition by Renesas Electronics. The CD74HC157M represents a legacy product line now managed under broader industrial logic portfolios.

Replacement Considerations

Standard equivalents include the SN74HC157 or MC74HC157. Verify that substitute parts maintain the same SOP16 footprint and electrical characteristics. Cross-reference datasheets to ensure identical enable logic polarity and output drive capabilities.