MC74ACT138MEL

Overview

The MC74ACT138MEL is a single 3-to-8 line decoder/demultiplexer from the 74ACT logic series, manufactured by onsemi. It operates with a supply voltage range of 4.5V to 5.5V and features surface-mount installation in an SOIC-16 package. The device provides active LOW mutually exclusive outputs driven by three binary address inputs. It includes multiple input enable pins for expansion capabilities and supports operation across a temperature range of -40°C to +85°C.

Feature Summary

• Converts 3-bit binary inputs into eight distinct active LOW outputs
• Includes multiple input enable pins to facilitate system expansion
• Provides active LOW mutually exclusive output states

Applications

• Address decoding in microprocessor-based systems
• Demultiplexing data streams in digital circuits
• Memory chip select generation

Procurement Notes

Verify the specific suffix 'MEL' against official datasheets to confirm package dimensions and tape/reel specifications, as suffixes often denote unique packaging or material variations. Ensure compatibility with existing PCB footprints and reflow profiles before integration.

Selection Notes

Select this component when a single 3-to-8 decoder with active LOW outputs is required within the 74ACT family. It is suitable for designs needing multiple enable inputs for complex addressing schemes. Verify that the SOIC-16 package fits the board layout constraints.

Part Context

This part belongs to the 74ACT series of high-speed CMOS logic devices. It functions as a standard 3-to-8 decoder/demultiplexer, offering performance characteristics typical of ACT technology, including faster switching speeds compared to older LS families while maintaining compatible pinouts.

Replacement Considerations

Direct substitutes include MC74ACT138DR2G and CD74ACT138M96. Verify pinout compatibility and electrical specifications before substitution.