CD74HC257M

Overview

The CD74HC257M is a high-speed CMOS logic device manufactured by Texas Instruments, functioning as a quad 2-input multiplexer with three-state non-inverting outputs. It integrates four independent data selectors within a single package, allowing for efficient routing of digital signals in complex circuitry. The component operates on a supply voltage range of 2 V to 6 V and features low propagation delay characteristics suitable for high-frequency applications. Designed for surface-mount technology, it utilizes an SOIC-16 package configuration to facilitate compact PCB layouts while maintaining robust signal integrity across industrial temperature ranges.

Feature Summary

• Integrates four independent 2-to-1 data selectors/multiplexers within a single integrated circuit package
• Provides three-state outputs that interface directly with system buses for bidirectional data transfer
• Features non-inverting data paths ensuring output signals maintain the same logical state as selected inputs
• Incorporates input clamp diodes to allow safe interfacing with voltages exceeding the supply rail

Applications

• Data selection and routing in digital communication systems
• Bus-oriented systems requiring shared data line management
• High-speed signal multiplexing in consumer electronics
• Industrial control logic involving parallel data processing

Procurement Notes

Verify the specific suffix 'M' indicates the SOIC-16 surface-mount package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor certificates prior to procurement. Ensure the ordering part number matches the exact logic family requirements for your design specifications.

Selection Notes

Select this component when designing circuits requiring multiple independent 2-input multiplexing functions in a compact form factor. The HC logic family offers compatibility with standard CMOS voltage levels, making it suitable for general-purpose digital applications. Consider the three-state output capability if bus sharing is required in the system architecture.

Part Context

This device belongs to the Texas Instruments 74HC series of high-speed CMOS logic products. The 74HC257 specifically addresses the need for multi-channel data selection in modern electronic designs. It serves as a fundamental building block for digital signal routing, offering reliability and performance consistent with industry-standard logic families.

Replacement Considerations

Compatible alternatives include the SN74HC257DR from Texas Instruments and the 74HC257D/AUJ from NXP Semiconductors. These parts share identical functional descriptions and pinouts, allowing for direct substitution in existing designs without schematic modifications.