MC74AC139DR2G

Overview

The MC74AC139DR2G is a dual 1-of-4 decoder/demultiplexer from the onsemi 74AC logic series. It operates within a supply voltage range of 2 V to 6 V and features two independent decoding circuits in a single SOIC-16 package. The device supports surface mount installation and functions reliably across an operating temperature range of -40°C to +85°C. Each circuit provides one input line and four output lines, utilizing AC-CMOS technology for efficient signal processing in digital logic applications.

Feature Summary

• Dual independent 1-of-4 decoding circuits integrated into a single package
• Operates with a wide supply voltage range from 2 V to 6 V
• Designed for surface mount technology (SMD/SMT) assembly
• Compatible with standard 74AC logic family specifications

Applications

• Address decoding for memory systems
• Demultiplexing data streams in digital communication
• Control logic for peripheral selection
• General-purpose binary decoding tasks

Procurement Notes

Verify the specific suffix DR2G confirms the SOIC-16 package and tape-and-reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation or material declarations. Ensure the ordering part number matches the required logic level and temperature grade for your specific design implementation.

Selection Notes

Select this component when dual independent 1-of-4 decoding is required within limited board space. The 74AC series offers faster switching speeds compared to standard 74LS equivalents while maintaining compatible pinouts. Verify that the 2 V to 6 V supply range aligns with the system power architecture and that the SOIC-16 footprint fits the PCB layout constraints.

Part Context

This part belongs to the broader MC74AC139 family, which includes variants with different packaging options such as TSSOP or PDIP. The 'D' indicates the SOIC-16 package style, while 'R2G' typically denotes reel packaging and environmental compliance. Other family members may share identical electrical characteristics but differ in physical dimensions or mounting styles.

Replacement Considerations

Direct replacements include other manufacturers' 74AC139 devices in SOIC-16 packages. Cross-reference with MC74AC139DTR2G if TSSOP packaging is acceptable. Verify pinout compatibility and electrical parameters before substituting with generic 74AC139 components from alternative suppliers.