MC74LCX125DG

Overview

The MC74LCX125DG is a low-voltage quad buffer manufactured by onsemi, belonging to the 74LCX series. It features four non-inverting buffers with three-state outputs and 5V tolerant inputs and outputs. The device operates within a supply voltage range of 2.0V to 3.6V. It utilizes a 14-SOIC surface-mount package. Key electrical characteristics include a maximum output current of 24mA for both high and low states, and a typical propagation delay of 6.5ns at 3.3V with a 50pF load. The component supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides four independent non-inverting buffer channels with individual control capabilities
• Features three-state outputs allowing multiple drivers on shared buses without contention
• Incorporates 5V tolerant input and output structures for safe interfacing between different voltage domains
• Utilizes advanced CMOS technology to achieve low static power consumption while maintaining high-speed performance

Applications

• Memory bus buffering in portable electronic devices
• Clock distribution networks requiring signal isolation
• Voltage level translation interfaces between 3.3V and 5V logic systems
• General-purpose digital signal routing in industrial control equipment

Procurement Notes

Verify the specific suffix 'DG' against the manufacturer's official datasheet to confirm the exact package dimensions and tape-and-reel or tube packaging configuration. Ensure that the RoHS compliance status matches the current production requirements, as manufacturing processes may update environmental certifications over time. Cross-reference the pinout diagram with the target PCB footprint to prevent installation errors during assembly.

Selection Notes

Select this component when designing circuits that require driving multiple loads from a single source while maintaining signal integrity across mixed voltage environments. The three-state capability makes it suitable for bidirectional data paths where bus arbitration is necessary. Consider the 24mA drive strength for moderate capacitive loads, and verify that the 2.0V minimum supply voltage aligns with the system's power rail availability.

Part Context

This part belongs to the 74LCX family of low-voltage CMOS logic devices, which are designed to replace older 5V TTL-compatible logic families in modern low-power applications. The LCX series offers improved speed and lower power consumption compared to standard LVC devices while maintaining compatibility with legacy system interfaces. The MC74 prefix indicates it is a commercial-grade product distributed by onsemi.

Replacement Considerations

Direct substitutes include the NXP SN74LCX125D and Texas Instruments SN74LCX125D. Verify that alternative manufacturers provide identical pin configurations and electrical specifications to ensure drop-in compatibility without redesigning the surrounding circuitry.