MC74HC125ANG

Overview

The MC74HC125ANG is a quad three-state non-inverting buffer manufactured by onsemi. It features four independent buffers with separate output enable controls, where the enable signal is active-low. The device operates within a supply voltage range of 2.0 V to 6.0 V and provides an output drive capability sufficient for 15 LSTTL loads. It utilizes high-performance silicon-gate CMOS technology and is housed in a 14-pin PDIP package.

Feature Summary

• Provides four independent non-inverting buffers with individual active-low output enables
• Outputs directly interface with CMOS, NMOS, and TTL logic families
• Compatible with standard CMOS outputs and LSTTL outputs when pullup resistors are used
• Designed for use in three-state memory address drivers, clock drivers, and bus-oriented systems

Applications

• Three-state memory address drivers
• Clock drivers
• Bus-oriented systems

Procurement Notes

Verify the specific suffix 'A' and package type 'NG' against current manufacturer documentation, as component specifications may vary between revisions. Confirm that the active-low enable logic matches system requirements. Check for RoHS compliance status and ensure the operating temperature range meets environmental constraints. Validate pinout compatibility if replacing existing LS125 designs.

Selection Notes

Select this component when a quad buffer with three-state control is required for bus applications. Ensure the design supports the 2.0 V to 6.0 V supply range. Verify that the active-low enable polarity aligns with the control logic. Consider the 14-pin PDIP package for through-hole mounting needs. Compare input current and noise immunity specifications against other HC series alternatives.

Part Context

This part belongs to the 74HC125 family of high-speed CMOS logic devices. It serves as a direct pin-compatible replacement for older LS125 and LS126 components while offering improved performance characteristics typical of CMOS technology. The family includes variants with different enable polarities and packaging options.

Replacement Considerations

Direct substitutes include CD74HC125E from Texas Instruments and TC74HC125APF from Toshiba Semiconductor and Storage. These alternatives maintain identical pinouts and logical functions.