MC74AC139DTR2G

Overview

The MC74AC139DTR2G is a dual 1-of-4 decoder/demultiplexer from the 74AC logic series, manufactured by onsemi. It operates within a supply voltage range of 2V to 6V and features two independent decoding circuits in a single package. The device utilizes a 16-TSSOP surface-mount package with a width of 4.40mm. It supports a wide operating temperature range from -40°C to +85°C. Output drive capability is specified at 24mA for both high and low states. The component is RoHS compliant and classified under EAR99.

Feature Summary

• Dual independent 1-of-4 decoding functionality integrated into a single compact package
• High-speed AC logic performance suitable for demanding digital applications
• Robust output drive strength supporting direct interfacing with various loads

Applications

• Address decoding in memory systems
• Signal routing and demultiplexing
• Control logic for peripheral selection

Procurement Notes

Verify the specific ordering suffix against official datasheets to confirm package type and tape/reel specifications. Confirm RoHS compliance status and environmental declarations prior to integration. Ensure compatibility with existing PCB footprint dimensions and thermal management requirements during the design phase.

Selection Notes

Select this component when dual independent decoding channels are required within a limited board area. The AC series offers higher speed than HC variants while maintaining standard CMOS input characteristics. Verify that the 2V to 6V supply range aligns with the system power architecture and that the TSSOP-16 package fits the assembly constraints.

Part Context

This part belongs to the MC74AC139 family of decoders and demultiplexers. It serves as a surface-mount alternative to through-hole equivalents, facilitating automated assembly processes. The device complements other logic families by providing balanced propagation delays and standardized pinouts for easy migration from previous designs.

Replacement Considerations

MC74AC139DR2G