MC74HC125AFL2

Overview

The MC74HC125AFL2 is a quad buffer and line driver from the HC/UH series, manufactured by Motorola (NXP). It features four independent non-inverting buffers with three-state outputs in a 16-lead Small Outline Flat package. The device operates within a voltage range of 2.0 to 6.0 V and supports an operating temperature range of -55°C to 125°C. Key electrical characteristics include a maximum output current of 8 mA and low input current of 1.0 µA. It is designed for bus-oriented systems and memory address drivers.

Feature Summary

• Provides four independent non-inverting buffer channels with active-low output enables
• Features three-state outputs suitable for direct connection to bus structures
• Compatible with standard CMOS outputs and LSTTL outputs when pull-up resistors are used
• Offers high noise immunity characteristic of CMOS devices

Applications

• Memory address drivers in computer systems
• Clock drivers for synchronous circuits
• Bus-oriented system interconnects
• Line drivers for signal transmission

Procurement Notes

Verify the manufacturer origin as Motorola or NXP, as production rights may have transferred. Confirm the package type is 16-SOIC (Small Outline Flat) and check for RoHS compliance status. Ensure the specific suffix 'AFL2' matches the required lead-free and tape-and-reel specifications if applicable. Cross-reference datasheets for exact pinout compatibility with existing designs.

Selection Notes

Select this component when a quad non-inverting buffer with three-state control is required. It is suitable for applications needing interface between CMOS and TTL logic levels. Consider the 2.0V to 6.0V supply range for flexibility. Verify that the 16-pin SOIC package fits the PCB layout constraints. Check propagation delay specifications against timing requirements.

Part Context

This part belongs to the 74HC family of high-speed CMOS logic devices. It is functionally similar to other 74HC125 variants but distinguished by its specific packaging and manufacturing source. The HC series offers faster switching speeds compared to standard 74C series while maintaining low power consumption. It is widely used in digital logic applications requiring buffering and bus driving capabilities.

Replacement Considerations

Compatible substitutes include 74HC125 from other manufacturers such as Nexperia or ON Semiconductor, provided they match the 16-SOIC package and electrical specifications. Verify pinout compatibility and output drive strength before substitution.