MC74HC125AN

Overview

The MC74HC125AN is a high-performance silicon-gate CMOS quad three-state noninverting buffer manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V and features low input current of 1.0 μA. The device provides an output drive capability sufficient for 15 LSTTL loads and directly interfaces with CMOS, NMOS, and TTL logic families. 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 14-pin DIP package.

Feature Summary

• Quad three-state noninverting buffering architecture with independent active-low output enables
• Direct interface compatibility with CMOS, NMOS, and TTL logic families without level shifting
• High noise immunity characteristic of CMOS devices compliant with JEDEC Standard No. 7A
• Low input current consumption reducing load on preceding circuit stages

Applications

• Three-state memory address drivers in computer systems
• Clock signal distribution buffers
• Bus-oriented system data routing
• Interface bridging between different logic voltage domains

Procurement Notes

Verify the specific suffix 'AN' against the official datasheet to confirm the package type and tape/reel specifications. Ensure the order quantity matches the manufacturer's standard packaging units. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a quad buffer with three-state control is required for bus applications. The HC series offers wider voltage flexibility compared to HCT variants. Verify that the active-low enable requirement aligns with the system design. Consider thermal dissipation capabilities if operating near maximum voltage limits.

Part Context

This part belongs to the 74HC family of high-speed CMOS logic devices. It serves as a functional equivalent to the LS125 but with improved power consumption and broader voltage operation. The quad configuration allows multiple signal lines to be buffered simultaneously within a single integrated circuit package.

Replacement Considerations

Compatible substitutes include MC74HC126AN for active-high enable configurations. Cross-vendor equivalents such as NXP 74HC125 or Diodes Incorporated 74HC125 may be used if pinout and electrical characteristics match exactly.