CD74HCT158E

Overview

The CD74HCT158E is a quad 2-input multiplexer manufactured by Harris Corporation, belonging to the 74HCT logic series. It features four independent data selectors, each capable of choosing between two inputs based on control signals. The device operates within a supply voltage range of 4.5V to 5.5V and supports output currents of 6mA for both high and low states. It is housed in a 16-pin DIP package with an operating temperature range of -55°C to 125°C.

Feature Summary

• Provides four independent 2-to-1 data selection channels
• Utilizes HCT CMOS technology for compatibility with TTL inputs
• Features active-low output enable functionality

Applications

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

Procurement Notes

Verify component authenticity as the manufacturer is Harris Corporation, which may involve legacy sourcing through distributors like Rochester Electronics. Confirm RoHS compliance status, as indicated by non-compliant markings in available records. Ensure the 16-DIP package matches your PCB footprint requirements before finalizing procurement.

Selection Notes

Select this component when multiple signal sources require switching to a single destination using standard TTL-compatible logic levels. The HCT series ensures direct interface with 5V logic systems without level shifting. Consider the 16-pin DIP package for prototyping or through-hole assembly needs where surface mount options are not feasible.

Part Context

This part belongs to the Harris Corporation 74HCT family of high-speed CMOS logic devices. It is functionally compatible with other industry-standard 74HCT158 equivalents but retains Harris-specific manufacturing characteristics. The device is designed for general-purpose digital logic applications requiring reliable signal multiplexing.

Replacement Considerations

Check for pin-compatible alternatives from other manufacturers if Harris stock is unavailable. Verify that substitute parts maintain the same 74HCT logic family specifications and 16-DIP packaging to ensure direct interchangeability without circuit redesign.