MC74HC125ADG

Overview

The MC74HC125ADG is a high-performance silicon-gate CMOS quad 3-state noninverting buffer manufactured by onsemi. It operates within a DC supply voltage range of 2.0 to 6.0 V and supports an operating free-air temperature from -55°C to +125°C. The device features four independent output enables that are active-low, allowing for precise control in bus-oriented systems. It provides an output drive capability sufficient for 15 LSTTL loads and ensures direct interface compatibility with CMOS, NMOS, and TTL logic families.

Feature Summary

• Provides four independent noninverting buffers with active-low output enables for flexible bus management
• Ensures direct interface compatibility with standard CMOS, NMOS, and TTL logic families
• Delivers robust noise immunity characteristic of CMOS devices while maintaining low input current
• Compatible with LS125 pinout standards, facilitating straightforward integration into existing designs

Applications

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

Procurement Notes

Verify the specific package suffix 'D' corresponds to the SOIC-14 configuration as documented in the ordering information table. Confirm RoHS compliance status and lead-free packaging details through official manufacturer declarations. Ensure the active-low enable functionality aligns with the target circuit design requirements before finalizing procurement.

Selection Notes

Select this component when a quad buffer with three-state output control is required for bus architectures. The HC series offers a wide 2.0 V to 6.0 V operating range suitable for various power environments. Verify that the active-low enable polarity matches the system control logic, distinguishing it from the HC126 variant which utilizes active-high enables.

Part Context

This part belongs to the MC74HC125A family of high-performance silicon-gate CMOS logic devices. It shares identical pinouts with legacy LS125 components, ensuring backward compatibility. The device is designed specifically for applications requiring multiple buffered outputs with individual tri-state control capabilities in digital communication systems.

Replacement Considerations

MC74HC126ADG (Active-High Enable)

FAQ

What is the logic polarity of the output enables?

The MC74HC125ADG features four separate output enables that are active-low.

Is the device compatible with TTL outputs?

Yes, the inputs are compatible with standard CMOS outputs and can interface directly with TTL outputs.