MC74ACT139MELG

Overview

The MC74ACT139MELG is a high-speed dual 1-of-4 decoder/demultiplexer manufactured by onsemi. It features two independent decoders, each accepting two binary weighted address inputs and providing four mutually exclusive active-LOW outputs. The device includes an active-LOW enable input per decoder, which can function as a data input for demultiplexing applications. Designed with TTL-compatible inputs, it operates within a supply voltage range of 4.5 V to 5.5 V. The component is housed in a 16-lead EIAJ package.

Feature Summary

• Dual independent 1-of-4 decoding capability
• Active-LOW mutually exclusive outputs
• TTL compatible inputs

Applications

• Address decoding
• Demultiplexing
• Function generation

Procurement Notes

Verify the specific ordering suffix ELG against official documentation to confirm tape and reel packaging details. Ensure the part number matches the exact logic family requirements. Confirm RoHS compliance status through manufacturer resources if environmental specifications are critical for the intended application.

Selection Notes

Select this component when a design requires two separate 1-of-4 decoding functions or demultiplexing paths within a single integrated circuit. The ACT series provides TTL-compatible input thresholds, facilitating direct interfacing with standard logic families. Verify that the operating voltage and current drive capabilities align with the system's power budget and load requirements.

Part Context

This device belongs to the MC74ACT139 product line, which falls under the category of decoders, encoders, multiplexers, and demultiplexers. It is part of the broader 74ACT logic family, designed for high-speed digital applications requiring CMOS performance with TTL-compatible inputs.

Replacement Considerations

MC74ACT139DT

FAQ

Can the Enable input be used as a data input?

Yes, the active-LOW Enable input can be utilized as the data input for a 4-output demultiplexer application.

What type of outputs does the device provide?

The device provides four mutually exclusive active-LOW outputs for each decoder section.