MC74HC125ADG

Overview

The MC74HC125ADG is a quad buffer and line driver manufactured by onsemi, formerly Fairchild Semiconductor. It belongs to the HC logic series and features four non-inverting channels with three-state outputs. The device operates within a supply voltage range of 2 V to 6 V. Key electrical parameters include a propagation delay of 90 ns at 2 V, 36 ns at 3 V, 18 ns at 4.5 V, and 15 ns at 6 V. Output drive capabilities are specified as -7.8 mA for high level and 7.8 mA for low level. Static current is typically 4 uA, with a maximum power dissipation of 450 mW. It is housed in a TSSOP-14 package and supports an operating temperature range from -55 C to +125 C.

Feature Summary

• Provides four independent non-inverting buffer channels with three-state output control for bus-oriented applications.
• Operates across a wide supply voltage range from 2 V to 6 V, compatible with standard CMOS logic families.
• Features low static power consumption and high noise immunity characteristic of HC CMOS technology.

Applications

• Bus-oriented systems requiring signal buffering and isolation.
• Clock distribution networks for timing signals.
• Memory address drivers and data line buffers.

Procurement Notes

Verify the manufacturer designation, as onsemi acquired Fairchild Semiconductor's logic business. Confirm the specific suffix 'DG' corresponds to the TSSOP-14 package variant. Ensure compatibility with existing design specifications regarding pinout and electrical characteristics before integration.

Selection Notes

Select this component when a quad buffer with three-state capability is required for 2V to 6V operation. Consider the TSSOP-14 package for surface-mount assembly constraints. Evaluate propagation delay requirements against the specific supply voltage to ensure timing margins are met for the target application speed.

Part Context

This part is part of the MC74HC125A family of quad buffers. It serves as a standard solution for driving multiple loads or isolating sections of a circuit. The HC series offers performance comparable to LS TTL but with lower power consumption and wider voltage tolerance.

Replacement Considerations

MC74HC125ADTR2G: Same logical function and pinout, differing primarily in packaging (TSSOP-14 vs. Reel/Cut Tape availability).