CD74HCT157M

Overview

The CD74HCT157M 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 supports data rates up to 24MHz. The device features four independent multiplexers, each selecting one of two data inputs based on a common select line. It utilizes a 16-pin Small Outline Package (SOP) with a plastic/epoxy body. The component is designed for synchronous operation and includes true outputs.

Feature Summary

• Integrates four independent 2-to-1 multiplexing channels within a single package
• Utilizes high-speed CMOS technology compatible with HCT logic standards
• Features a common select input to control all four multiplexers simultaneously

Applications

• Data routing in digital systems
• Signal selection circuits
• Parallel-to-serial conversion interfaces

Procurement Notes

Verify the specific manufacturer source, as Harris Corporation's logic assets were acquired by Intersil and subsequently Renesas. Confirm RoHS compliance status, as documentation indicates non-compliance for this specific part number. Ensure the SOP-16 package matches the design footprint requirements before procurement.

Selection Notes

Select this component when multiple independent 2-input signal paths require simultaneous switching controlled by a single select line. The HCT series compatibility ensures interface compatibility with standard TTL-level logic inputs. Verify that the 2V to 6V operating voltage range aligns with the system power supply constraints.

Part Context

This component belongs to the 74HCT logic family, which provides CMOS density with TTL-compatible inputs. The CD74 prefix typically denotes commercial temperature range variants produced under the Harris or subsequent acquired manufacturing lines. It serves as a fundamental building block for multi-channel data selection tasks in embedded systems.

Replacement Considerations

Check for equivalents from Intersil or Renesas, such as the ISL74HCT157, noting potential differences in RoHS status and exact pinout verification. Cross-reference with other 74HCT157 variants from different manufacturers to ensure package and electrical parameter compatibility.