CD74HCT257M96

Overview

The CD74HCT257M96 is a Texas Instruments high-speed CMOS quad 2-line to 1-line data selector/multiplexer. It features buffered inputs and operates within a supply voltage range of 2V to 6V for HC variants, though HCT series typically specifies 4.5V to 5.5V. The device provides four independent multiplexers with enable control. Key electrical parameters include a typical propagation delay of 12ns at VCC=5V and CL=15pF, with a bandwidth of 28 MHz. It supports a fanout over the temperature range and includes ESD protection rated at 0.75 kV via Charged Device Model testing.

Feature Summary

• Quad configuration providing four independent 2-to-1 multiplexing channels
• Buffered inputs ensure signal integrity and noise immunity
• High-speed operation with typical propagation delay of 12 nanoseconds
• Integrated enable control for precise data path management

Applications

• Data routing in digital communication systems
• Signal selection in microprocessor-based architectures
• Multiplexing analog or digital signals for shared processing
• Line driver interface circuits requiring signal switching

Procurement Notes

Verify the specific logic family suffix (HC vs HCT) as voltage ranges differ significantly between the two. Confirm package type and tape/reel specifications match assembly requirements. Check RoHS compliance status and environmental certifications. Ensure ESD handling procedures are followed during storage and installation. Validate pinout compatibility if replacing existing components on legacy boards.

Selection Notes

Choose this component when multiple independent 2-to-1 signal paths are required in a compact SOIC package. Consider the HCT variant for direct TTL compatibility and the HC variant for broader voltage flexibility. Evaluate propagation delay requirements against system clock speeds. Assess power consumption constraints relative to other logic families. Verify operating temperature range suitability for the intended environment.

Part Context

This part belongs to the CD74HCT/HC series of logic ICs from Texas Instruments. These devices are designed for general-purpose digital applications requiring reliable switching and buffering. The M96 suffix indicates specific packaging and handling characteristics. The series offers a balance of speed, power efficiency, and ease of integration into standard digital circuits.

Replacement Considerations

CD74HCT257N

FAQ

What is the typical propagation delay of the CD74HCT257M96?

The typical propagation delay is 12 nanoseconds when measured at VCC = 5V with a load capacitance of 15pF at 25°C.

Does the CD74HCT257M96 have buffered inputs?

Yes, the datasheet explicitly lists buffered inputs as a key feature to improve performance and noise tolerance.

What is the ESD protection rating for this component?

The device has an ESD Charged Device Model rating of 0.75 kV.