CD74HC126M

Overview

The CD74HC126M is a high-speed CMOS logic quad buffer with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and supports an operating temperature range from -55°C to 125°C. The device features four independent non-inverting buffers, each with a dedicated output enable control input. When the enable input is low, the buffer drives the signal; when high, the output enters a high-impedance state. It utilizes a 14-pin SOIC package.

Feature Summary

• Provides four independent non-inverting buffering paths for signal integrity maintenance.
• Features active-low output enable controls to isolate circuits via high-impedance states.
• Constructed using high-speed CMOS technology for low power consumption and noise immunity.

Applications

• Bus-oriented memory and data transmission systems
• Clock distribution networks requiring signal isolation
• Digital signal routing in industrial control environments

Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm package type and temperature grade. Ensure the ordering part number matches the required RoHS compliance status and moisture sensitivity level. Cross-reference the manufacturer's latest product change notifications to confirm current production status and any potential pinout or electrical specification updates before finalizing procurement.

Selection Notes

Select this component when non-inverting buffering with tri-state capability is required for bus architectures. Compare propagation delay specifications against system timing requirements. Verify that the 2V to 6V supply range aligns with the target circuit's voltage rails. Consider the 14-SOIC package dimensions for PCB layout constraints and thermal management needs in high-temperature applications.

Part Context

This device belongs to the Texas Instruments 74HC series of high-speed CMOS logic devices. It is functionally compatible with the standard 74126 family but offers improved switching speeds and lower power dissipation typical of HC technology. The CD prefix indicates commercial grade availability, while the M suffix denotes the surface-mount SOIC package format.

Replacement Considerations

Direct functional equivalents include the SN74HC126 and CD54HC126. Verify pin compatibility and electrical characteristics such as output drive strength and propagation delay before substitution. Check for automotive qualification requirements if the application demands AEC-Q100 standards.