MC74ACT125DG

Overview

The MC74ACT125DG is a quad 3-state buffer manufactured by onsemi, utilizing high-performance silicon-gate CMOS technology. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible inputs. The device provides four non-inverting buffers with low-enable control, housed in a 14-lead SOIC package. Key electrical characteristics include an output current capability of ±24 mA and a maximum quiescent supply current of 80 µA at 5.5 V. Propagation delay is specified between 1.0 ns and 10 ns at 5.0 V with a 50 pF load.

Feature Summary

• Features TTL-compatible inputs for direct interfacing with TTL logic systems.
• Provides three-state outputs controlled by a low-active enable input.
• Capable of sourcing and sinking significant output currents.

Applications

• Buffering memory address data lines
• Driving bus-oriented circuits
• Clock distribution networks

Procurement Notes

Verify the specific ordering suffix 'DG' corresponds to the SOIC-14 package configuration. Confirm that the procurement matches the ACT series requirements, specifically the 4.5 V to 5.5 V operating voltage range, rather than the broader AC series specifications. Ensure the component is identified as Pb-Free according to manufacturer documentation.

Selection Notes

Select this component when TTL-compatible input thresholds are required alongside standard CMOS drive capabilities. The MC74ACT125DG is suitable for applications needing quad buffering with three-state control. Consider the SOIC-14 package dimensions and thermal resistance values if operating near the upper temperature limits.

Part Context

This part belongs to the MC74AC/ACT125 family of quad 3-state buffers. While the AC variant supports a wider voltage range (2.0 V to 6.0 V), the ACT variant specifically ensures compatibility with TTL input levels. Both share similar output drive strengths and package options.

Replacement Considerations

MC74AC125DG

FAQ

What is the input threshold characteristic of the MC74ACT125DG?

The MC74ACT125DG features TTL-compatible inputs, allowing it to interface directly with TTL logic families without level shifting.

How does the enable function operate?

The device utilizes a low-active enable input; when the enable pin is low, the outputs are active, and when high, they enter a high-impedance state.