SN74LV138APWRG4

Overview

The SN74LV138APWRG4 is a low-voltage CMOS 3-to-8 line decoder/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 5.5 V and features three address inputs and eight active-low outputs. The device includes two active-low enable inputs and one active-high enable input for chip selection control. Packaged in a 16-pin TSSOP, it supports surface-mount installation and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides decoding or demultiplexing functionality with three binary address lines controlling eight distinct active-low output channels.
• Incorporates a multi-enable architecture consisting of two active-low inputs (G1, G2A, G2B) that must be correctly biased to activate the logic function.
• Designed for low-voltage digital applications using advanced CMOS technology compatible with standard logic families.

Applications

• Address decoding for memory mapping in embedded systems
• Demultiplexing data streams to multiple peripheral devices
• Control signal distribution in industrial automation equipment

Procurement Notes

Verify the suffix 'G4' indicates lead-free construction and RoHS compliance per manufacturer standards. Confirm the TSSOP-16 package dimensions match PCB footprint requirements. Ensure the operating temperature range of -40°C to +85°C meets environmental specifications. Cross-reference the datasheet revision to confirm pinout consistency with existing designs.

Selection Notes

Select this component when a single 3-to-8 decoder is required within the LV series voltage constraints. Compare against SN74LV138ATPWR if higher temperature ratings up to +125°C are necessary. Consider SN74LVC138 variants if lower supply voltages near 1.8 V are needed, as LV series performance may vary at minimum thresholds.

Part Context

This part belongs to the Texas Instruments SN74LV138A family of low-voltage logic decoders. The 'G4' suffix specifically denotes green packaging compliant with RoHS directives and halogen-free standards. It serves as a direct functional replacement for legacy 74LS138 designs in modern low-power applications requiring reduced supply voltages.

Replacement Considerations

SN74LV138ATPWR offers identical logic functionality but supports an extended industrial temperature range up to +125°C. SN74LV138ADGVR provides the same electrical characteristics in a smaller VSSOP-16 package. Verify thermal management requirements when substituting between these packages.