74HC125DR2G

Overview

The onsemi 74HC125DR2G is a quad 3-state noninverting buffer manufactured using high-performance silicon-gate CMOS technology. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature from -55°C to +125°C. The device features four independent active-low output enables, allowing precise control over bus-oriented systems. Propagation delays are specified at 90 ns (at 2.0 V), 36 ns (at 3.0 V), 18 ns (at 4.5 V), and 15 ns (at 6.0 V). Output drive capability supports up to 15 LSTTL loads, with maximum low-level output current of 7.8 mA and maximum high-level output current of -7.8 mA.

Feature Summary

• Provides four independent noninverting buffers with separate active-low output enables for flexible bus management.
• Features high noise immunity characteristic of CMOS devices and compatibility with standard CMOS outputs.
• Includes robust ESD protection rated at 2000 V per Human Body Model and 200 V per Machine Model.

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented systems

Procurement Notes

Verify the specific package suffix 'D' corresponds to the SOIC-14 form factor required by your design. Confirm that the 'R2G' designation indicates tape and reel packaging with a quantity of 2500 units. Ensure the component meets Pb-Free requirements if applicable to your assembly process. Cross-reference the ordering information in the datasheet to validate the exact shipping configuration before finalizing procurement.

Selection Notes

Select this component when interfacing between different logic families such as CMOS, NMOS, and TTL due to its direct interface capabilities. Consider the wide operating voltage range of 2.0 V to 6.0 V for versatile power supply designs. Evaluate the propagation delay specifications against your system's timing requirements, particularly noting the performance variations across different supply voltages.

Part Context

This part belongs to the HC125 series of quad 3-state noninverting buffers. It shares pinout compatibility with LS125 devices, facilitating potential upgrades or replacements in existing designs. The device is part of onsemi's high-speed CMOS logic family, designed for applications requiring reliable signal buffering and bus driving capabilities.

Replacement Considerations

The datasheet notes identical pinout compatibility with LS125 devices. Verify electrical characteristics such as propagation delay and drive strength when substituting with other manufacturers' HC125 variants to ensure functional equivalence in your specific application.

FAQ

How does the 74HC125 handle unused inputs?

Unused inputs must always be tied to an appropriate logic voltage level, either GND or VCC, to ensure proper operation and prevent undefined states.

What is the maximum input leakage current?

The maximum input leakage current is ±1.0 µA at VCC = 6.0 V across the operating temperature range.