MC74ACT139NG

Overview

The MC74ACT139NG is a dual 1-of-4 decoder/demultiplexer from the 74ACT logic series, manufactured by onsemi. It features two independent decoders, each accepting two binary weighted address inputs (A0-A1) and providing four mutually exclusive active-LOW outputs (O0-O3). The device operates within a supply voltage range of 4.5 V to 5.5 V. It includes active-LOW enable inputs that can function as data inputs for demultiplexing applications or generate minterms for function generation.

Feature Summary

• Contains two completely independent 1-of-4 decoders with active-LOW mutually exclusive outputs.
• Features TTL-compatible inputs for direct interfacing with standard logic families.
• Capable of functioning as a 4-output demultiplexer using the active-LOW enable input as the data line.
• Generates all four minterms of two variables, allowing replacement of multiple discrete gate functions.

Applications

• Address decoding in microprocessor-based systems
• Data distribution in demultiplexer configurations
• Implementation of Boolean logic functions via minterm generation

Procurement Notes

Verify the specific ordering suffix 'N' corresponds to the PDIP-16 package when sourcing this component. Confirm that the procurement matches the ACT logic family requirements for TTL-compatible input levels. Ensure the selected part number aligns with the required operating temperature range of -40°C to +85°C for industrial applications.

Selection Notes

Select the MC74ACT139NG when TTL-compatible inputs are required alongside high-speed performance. This device is suitable for designs needing two independent decoding channels within a single package. Consider the PDIP-16 package constraints if through-hole mounting is necessary for the assembly process.

Part Context

This component belongs to the MC74ACT139 family, which integrates dual decoding capabilities into a single integrated circuit. It serves as a functional alternative to discrete logic gates for address decoding tasks. The device is part of onsemi's broader portfolio of standard logic components designed for general-purpose digital applications.

Replacement Considerations

MC74AC139N

FAQ

Can the enable input be used for data transmission?

Yes, the active-LOW enable input can serve as the data input for a 4-output demultiplexer application.

What is the logic family characteristic regarding input compatibility?

The ACT variant features TTL-compatible inputs, allowing it to interface directly with standard TTL logic devices.