MC74ACT157DTR2

Overview

The MC74ACT157DTR2 is a quad 2-input multiplexer manufactured by onsemi in a TSSOP-16 surface-mount package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. The device features TTL-compatible inputs, outputs capable of sourcing and sinking 24 mA, and provides four non-inverted outputs selected via common Select and Enable inputs.

Feature Summary

• TTL-compatible input logic levels
• Quad 2-input multiplexing architecture with common control
• High current drive capability for direct load interfacing

Applications

• Data routing between register groups to common buses
• Function generation using two variables
• Implementation of gating functions

Procurement Notes

Verify the specific ordering suffix 'DTR2' corresponds to the TSSOP-16 package configuration required for your design. Confirm that the ACT series specification aligns with your system's 5V logic requirements and input threshold compatibility before finalizing procurement.

Selection Notes

Select this component when TTL-compatible inputs are necessary alongside AC-series speed and drive strength. Ensure the application utilizes a single 5V power supply within the specified 4.5V to 5.5V range. Verify that the TSSOP-16 footprint matches the PCB layout constraints.

Part Context

This part belongs to the MC74AC/ACT157 family of quad multiplexers. It shares functional similarities with the MC74AC157 but distinguishes itself through TTL-compatible input thresholds, making it suitable for interfacing with legacy TTL logic families while maintaining CMOS output characteristics.

Replacement Considerations

MC74ACT157DT

FAQ

What is the primary difference between the MC74AC157 and MC74ACT157?

The MC74ACT157 features TTL-compatible input voltage levels, whereas the MC74AC157 uses standard CMOS thresholds.

How does the Enable input function?

The Enable input is active-LOW; when HIGH, all outputs are forced LOW regardless of other inputs.