CD74HCT253E

Overview

The CD74HCT253E is a dual 4-to-1 line selector/multiplexer manufactured by Harris Corporation. It features three-state outputs and operates within a supply voltage range of 4.5V to 5.5V. The device utilizes High-Speed CMOS technology and is housed in a 16-pin PDIP package. It includes common select inputs and separate output-enable inputs for flexible control. The component supports a fanout of ten LS TTL loads and functions reliably across an operating temperature range of -55°C to 125°C.

Feature Summary

• Dual 4-to-1 multiplexing capability with independent channel selection
• Three-state outputs allowing direct bus driving connections
• Separate output-enable inputs for precise data flow control
• Common select inputs simplify address decoding requirements

Applications

• Data routing in digital communication systems
• Address decoding in microprocessor-based designs
• Signal selection in test and measurement equipment
• Peripheral interface management in industrial control systems

Procurement Notes

Verify the manufacturer origin, as Harris Semiconductor assets were acquired by Texas Instruments. Confirm the specific suffix 'E' corresponds to the PDIP-16 package type. Check RoHS compliance status, as older Harris production may not meet current environmental standards. Ensure the source provides valid datasheet references matching SCHS170B or equivalent revisions to confirm electrical characteristics and pinout accuracy before integration.

Selection Notes

Select this component when dual independent 4-input multiplexing is required with high-speed CMOS performance. The HCT series ensures compatibility with standard TTL logic levels while offering CMOS power advantages. The separate enable inputs provide necessary isolation for complex bus architectures. Consider the PDIP-16 package if through-hole mounting is mandated by the PCB design constraints or legacy board layouts.

Part Context

This part belongs to the 74HCT logic family, designed for high-speed operation with TTL-compatible inputs. Harris Corporation originally produced this series before its semiconductor division was acquired. The CD74HCT253E specifically addresses applications requiring multiple signal paths to be managed efficiently within a single integrated circuit package.

Replacement Considerations

Texas Instruments CD74HCT253E serves as the primary successor. Verify pinout compatibility and electrical specifications against the original Harris datasheet. Other manufacturers may offer functionally equivalent parts, but ensure voltage ranges and output drive capabilities match the system requirements.