MC74HC125AFEL

Overview

The MC74HC125AFEL is a quad three-state non-inverting buffer manufactured by onsemi. It features high-performance silicon-gate CMOS technology and operates within a voltage range of 2.0 to 6.0 V. The device provides an output drive capability of 15 LSTTL loads and maintains low input current at 1.0 μA. Designed for bus-oriented systems, it includes four separate active-low output enables. The component complies with JEDEC Standard No. 7A requirements and utilizes a 20-SOIC package.

Feature Summary

• Provides four independent non-inverting buffers with active-low output enable controls
• Ensures direct interface compatibility with CMOS, NMOS, and TTL logic families
• Delivers robust noise immunity characteristic of CMOS devices in demanding environments

Applications

• Three-state memory address drivers
• Clock signal distribution systems
• Bus-oriented data transmission architectures

Procurement Notes

Verify the specific suffix AFEL against official datasheets to confirm package dimensions and tape-and-reel specifications. Ensure environmental compliance matches project requirements, as standard packages may vary in lead-free status. Cross-reference pinout configurations with legacy LS125 designs to guarantee mechanical and electrical compatibility during integration.

Selection Notes

Select this component when designing systems requiring multiple buffered outputs with independent control. The wide operating voltage range supports diverse power supply environments. Consider the active-low enable polarity for logical alignment with existing control signals. Evaluate thermal performance within the specified operating temperature range for long-term reliability.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It serves as a modern replacement for older LS125 variants while offering improved speed and lower power consumption. The quad configuration allows for efficient signal routing in complex digital circuits without requiring multiple discrete components.

Replacement Considerations

The MC74HC126A offers identical functionality but utilizes active-high output enables instead of active-low. Other manufacturers produce equivalent quad buffers under the 74HC125 designation, ensuring pin-compatible alternatives are available from different suppliers.