MC74ACT139DR2G

Overview

The MC74ACT139DR2G is a dual 1-of-4 decoder/demultiplexer manufactured by onsemi. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible inputs with CMOS outputs. The device is housed in a 16-pin SOIC package and supports surface-mount installation. It functions as two independent decoders, each utilizing three address inputs to select one of four active-low outputs.

Feature Summary

• Dual configuration providing two independent 1-of-4 decoding circuits
• TTL-compatible input logic levels for direct interface with TTL systems
• CMOS output structure ensuring low power consumption and high noise immunity

Applications

• Address decoding for memory and I/O port selection
• Demultiplexing data streams in digital communication systems
• Control signal generation in industrial automation equipment

Procurement Notes

Verify the specific suffix DR2G corresponds to the SOIC-16 tape and reel packaging format. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure input voltage levels remain within specified limits to maintain logical integrity and prevent device damage during operation.

Selection Notes

Select this component when dual independent decoding is required within a single package. The ACT series offers faster switching speeds compared to standard HC variants while maintaining compatibility with 5V logic systems. Verify that the 16-pin SOIC footprint aligns with the target PCB layout constraints and thermal management requirements.

Part Context

This part belongs to the 74ACT logic family, designed for high-speed applications requiring 5V operation. It serves as a functional equivalent to other industry-standard dual decoder ICs. The device integrates advanced CMOS technology to provide improved performance over older bipolar counterparts while reducing overall system power dissipation.

Replacement Considerations

Cross-reference with MC74ACT139D for tube packaging or MC74ACT139ADTR2G for TSSOP options if pinout compatibility is maintained. Verify electrical specifications match exactly before substitution.