SN74LVC139APWE4

Overview

The SN74LVC139APWE4 is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments LVC logic family. It operates within a supply voltage range of 1.65 V to 3.6 V and features active-low enable inputs that function as data lines in demultiplexing applications. The device provides fully buffered inputs compatible with 3.3-V or 5-V driving circuits, enabling use as a translator in mixed-voltage systems. It includes ESD protection exceeding JESD 22 standards and latch-up performance exceeding 250 mA per JESD 17. The maximum propagation delay is 6.2 ns.

Feature Summary

• Dual independent 2-to-4 decoding and demultiplexing circuits
• Fully buffered inputs for mixed 3.3-V/5-V system translation
• Active-low enable inputs usable as data lines
• High ESD protection and robust latch-up performance

Applications

• Address decoding in embedded systems
• Data distribution in demultiplexing configurations
• Voltage level translation between 3.3-V and 5-V domains
• Memory address selection circuits

Procurement Notes

Verify the specific ordering suffix 'E4' indicates lead-free compliance and RoHS status when sourcing. Confirm the package type matches the required PCB footprint, as this part number corresponds to the PW (TSSOP) variant. Ensure the operating temperature range aligns with the application environment requirements before finalizing procurement.

Selection Notes

Select this component for designs requiring low-voltage operation down to 1.65 V with high-speed decoding capabilities. The LVC series offers lower power consumption compared to older logic families while maintaining compatibility with standard digital interfaces. Consider the TSSOP package constraints regarding thermal dissipation and board space availability during the selection process.

Part Context

This device belongs to the SN74LVC139A family of decoders and demultiplexers manufactured by Texas Instruments. The 'E4' suffix typically denotes environmental compliance attributes such as lead-free construction and adherence to RoHS directives. It is part of the broader LVC logic portfolio designed for low-voltage CMOS applications.

Replacement Considerations

SN74LVC139APW is the non-environmental variant with identical electrical specifications and pinout.