CD74HC243E

Overview

The CD74HC243E is a high-speed CMOS logic quad-bus transceiver manufactured by Texas Instruments. It features three-state outputs and operates within a supply voltage range of 2 V to 6 V. The device supports an operating temperature range from -55 °C to +125 °C. It utilizes a PDIP-20 package for through-hole mounting.

Feature Summary

• Provides four bidirectional bus transceivers with three-state output capability
• Supports high-speed CMOS logic operation across wide voltage ranges
• Designed for industrial temperature environments

Applications

• Bidirectional data bus transmission systems
• Memory interface circuits requiring tri-state control
• Industrial control modules operating in extreme temperatures

Procurement Notes

Verify the specific datasheet revision corresponding to the manufacturing date code, as electrical characteristics may vary between revisions. Confirm that the PDIP-20 package matches the target PCB footprint requirements. Ensure the supply voltage applied does not exceed the maximum rating of 6 V to prevent device damage.

Selection Notes

Select this component when a quad-width bidirectional interface with tri-state isolation is required. The HC series offers standard speed suitable for general-purpose digital logic applications. Consider the extended temperature range if the deployment environment exceeds standard commercial limits.

Part Context

This part belongs to the Texas Instruments CD74HC family of high-speed CMOS logic devices. It serves as a functional equivalent to other industry-standard quad-bus transceivers within the 74HC series architecture, providing compatibility with standard digital logic interfaces.

Replacement Considerations

The CD74HC243EE4 is a verified lead-free variant of this component. Other compatible parts include the CD54HC243 for military-grade specifications.