MC74F125N

Overview

The MC74F125N is a quad bus buffer gate manufactured by Motorola, belonging to the F/FAST logic series. It features four independent non-inverting buffers with three-state outputs housed in a PDSO14 plastic SOIC-14 package. The device operates on a bipolar TTL technology platform and supports a supply voltage range of 4.5 V to 5.5 V. It provides high drive capability with a low-level output current of 64 mA and a high-level output current of -15 mA. The component functions within an operating temperature range of 0°C to 70°C.

Feature Summary

• Contains four independent non-inverting buffer channels for signal conditioning
• Features three-state outputs allowing connection to shared data buses
• Utilizes F/FAST bipolar technology for high-speed switching performance
• Designed for standard 5V TTL logic system integration

Applications

• Bus-oriented memory and register drives
• Clock drivers and buffer circuits
• Transceiver buses for bidirectional data transmission

Procurement Notes

Verify the specific manufacturer designation as Texas Instruments acquired Motorola's logic business. Confirm that the MC74F125N part number corresponds to the legacy Motorola specifications or the TI equivalent SN74F125NSR. Ensure the package type matches the required SOIC-14 footprint and validate RoHS compliance status against current regulatory requirements before procurement.

Selection Notes

Select this component when designing systems requiring high-speed buffering with three-state control capabilities. It is suitable for applications needing strong drive currents for bus lines. Compare propagation delay characteristics against other F-series devices if timing constraints are critical. Ensure the power supply voltage remains strictly within the specified 4.5 V to 5.5 V range to maintain reliable operation.

Part Context

This component belongs to the widely used 74F series of high-speed Schottky TTL logic devices. It serves as a functional equivalent to other quad bus buffers like the 74LS125 but offers faster switching speeds. The device is commonly found in digital communication interfaces and microprocessor-based systems where signal integrity and bus isolation are necessary.

Replacement Considerations

The SN74F125NSR from Texas Instruments is a direct pin-compatible replacement. Other compatible alternatives include the MC74F125D from Rochester Electronics. Verify electrical parameters and package dimensions before substituting.