CD74HCT157E

Overview

The CD74HCT157E is a high-speed CMOS quad 2-input multiplexer manufactured by Harris Corporation. It operates within a supply voltage range of 4.5V to 5.5V and features direct LSTTL-compatible inputs. The device provides four independent data selectors, each capable of routing one of two input sources to a common output under the control of shared select lines. Packaged in a 16-pin PDIP format, it supports an operating temperature range from -55°C to 125°C.

Feature Summary

• Quad configuration providing four independent 2-to-1 data selectors
• Direct compatibility with LSTTL logic input levels
• High-speed CMOS technology for low power consumption

Applications

• Data selection and routing in digital systems
• Signal switching between multiple sources
• Address decoding applications

Procurement Notes

Verify component authenticity as Harris Corporation assets were acquired by other entities. Confirm RoHS compliance status, as original Harris parts may not meet current environmental standards. Check for obsolete status indicators from current distributors. Ensure packaging matches the specified 16-pin DIP form factor. Validate datasheet version SCHS153C or equivalent for accurate electrical characteristics.

Selection Notes

Select this component when interfacing CMOS logic with LSTTL signals is required. The quad architecture simplifies board layout for multi-channel data routing. Consider the wide operating temperature range for industrial environments. Verify that the 16-pin DIP package fits the target PCB footprint. Ensure supply voltage constraints align with the 4.5V to 5.5V specification.

Part Context

This part belongs to the 74HCT series of high-speed CMOS logic devices. It is functionally similar to the CD74HC157 but offers LSTTL-compatible input thresholds. The device is often grouped with other multiplexers like the CD74HCT158 in system designs requiring flexible data path management.

Replacement Considerations

CD74HC157E: Compatible HC series alternative with different input threshold characteristics. CD74HCT157M: Same HCT functionality in SOIC package instead of DIP.