CD74HCT257E

Overview

The CD74HCT257E is a quad 2-input multiplexer manufactured by Harris Corporation, belonging to the 74HCT logic series. It features tri-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device utilizes a PDIP-16 package with through-hole mounting capabilities. It supports a propagation delay of 41 ns and functions reliably across an extended temperature range from -55 °C to +125 °C.

Feature Summary

• Quad configuration providing four independent 2-input data selection paths
• Tri-state output capability for bus-oriented systems
• CMOS technology compatible with standard TTL logic levels

Applications

• Data routing in digital communication systems
• Address decoding circuits
• Signal switching applications

Procurement Notes

Verify manufacturer origin as Harris Corporation or authorized successor entities due to historical production changes. Confirm RoHS compliance status and specific lot markings against current datasheet requirements. Ensure packaging type matches project specifications for through-hole assembly processes.

Selection Notes

Select this component when multiple signal sources require selection via control lines. The HCT series ensures compatibility with 5V CMOS logic families. Verify pinout alignment with existing PCB layouts before integration into designs requiring high-temperature operation stability.

Part Context

This part belongs to the widely used 74HCT family of logic integrated circuits. It serves as a fundamental building block for digital design, enabling efficient management of data flow between various system components without signal degradation.

Replacement Considerations

Check for equivalents such as SN74HCT257 from Texas Instruments. Verify functional compatibility regarding pin assignments and electrical characteristics before substituting.