SN74HC139QDRG4Q1

Overview

The SN74HC139QDRG4Q1 is a dual 2-to-4-line decoder/demultiplexer from the Texas Instruments SN74HC139-Q1 automotive-grade logic family. It operates within a supply voltage range of 2 V to 6 V and features a propagation delay of 44 ns. The device supports an operating temperature range from -40°C to +125°C and holds AEC-Q100 qualification for automotive applications. It is housed in a 16-pin SOIC (Narrow) surface-mount package.

Feature Summary

• Dual independent 2-to-4 line decoding and demultiplexing functionality
• Automotive grade reliability with AEC-Q100 certification
• Extended industrial temperature operation up to +125°C

Applications

• Automotive electronic control unit address decoding
• Multiplexed display driver selection
• Memory chip select generation in vehicle systems

Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and manufacturing origin details as per Texas Instruments documentation. Confirm the package type matches the required PCB footprint, specifically the SOIC-N-16 variant. Ensure the component meets the AEC-Q100 grade requirements for your target automotive application environment before finalizing procurement specifications.

Selection Notes

Select this component when dual independent decoding channels are required in space-constrained automotive designs. The HC logic family offers standard CMOS performance suitable for general digital interfacing. Consider the 16-pin SOIC package for surface mount assembly compatibility. Verify that the 2V to 6V supply range aligns with the system power architecture.

Part Context

This part belongs to the SN74HC139-Q1 series, designed specifically for automotive electronics. It provides two separate decoders or demultiplexers in a single package, optimizing board space compared to using discrete components. The Q1 designation signifies its qualification for automotive use under strict reliability standards defined by the Automotive Electronics Council.

Replacement Considerations

SN74HC139QDRQ1 is a verified alternative within the same product family offering identical functional characteristics.