MC74HC125AFR1

Overview

The MC74HC125AFR1 is a quad buffer and line driver from onsemi's HC logic series. It features four non-inverting outputs with three-state capability, housed in a 14-pin SOIC package. The device operates within a supply voltage range of 2 V to 6 V. Key electrical parameters include a high-level output current of -7.8 mA and a low-level output current of 7.8 mA. Propagation delay varies from 90 ns at 2 V to 15 ns at 6 V. It supports surface mount installation and functions across an operating temperature range of -55°C to +125°C.

Feature Summary

• Provides four independent non-inverting buffers with three-state output control for bus-oriented systems.
• Compatible with standard CMOS outputs and LSTTL outputs when pull-up resistors are used.
• Features low input current to minimize loading effects on preceding circuit stages.
• Offers high noise immunity consistent with JEDEC standards for stable operation in noisy environments.

Applications

• Three-state memory address drivers
• Clock signal distribution circuits
• Bus-oriented system interconnects

Procurement Notes

Verify the specific suffix 'FR1' against official datasheets to confirm tape-and-reel packaging specifications and pinout compatibility. Ensure the selected variant matches the required operating temperature range and voltage levels for the target application environment before finalizing procurement decisions.

Selection Notes

Select this component for designs requiring quad buffering with tri-state isolation. Compare propagation delays at the specific operating voltage against timing requirements. Verify that the 14-pin SOIC package fits the PCB layout constraints and thermal management needs of the assembly process.

Part Context

This part belongs to the MC74HC125A family of quadruple buffers. It shares pin configurations with LS125 equivalents, facilitating drop-in replacements in legacy designs. The HC technology ensures CMOS compatibility while providing sufficient drive strength for multiple loads.

Replacement Considerations

MC74HC125ADTR2G is a documented equivalent variant from the same manufacturer offering identical logical functionality in a TSSOP-14 package.