SN74LV138ATPW

Overview

The SN74LV138ATPW is a Texas Instruments logic component belonging to the LV series, functioning as a 3-to-8 line decoder and demultiplexer. It features three address inputs and eight active-low outputs, controlled by two active-low enable inputs and one active-high enable input. The device operates within a supply voltage range of 2 V to 5.5 V and supports surface-mount installation in a TSSOP-16 package. It is rated for an operating temperature range from -40°C to +125°C.

Feature Summary

• Provides decoding and demultiplexing functions with three address lines and eight active-low outputs.
• Includes dual active-low and single active-high enable inputs for flexible control logic integration.

Applications

• Address decoding in embedded systems
• Demultiplexing data streams in digital circuits
• Memory chip select generation

Procurement Notes

Verify the specific suffix 'TPW' corresponds to the TSSOP-16 package configuration when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to procurement. Ensure the intended application environment falls within the specified -40°C to +125°C operating temperature range to maintain device reliability and performance specifications.

Selection Notes

Select this component for designs requiring low-voltage operation compatible with both 2V and 5.5V systems. The TSSOP-16 package offers a compact footprint suitable for space-constrained PCB layouts. Consider the active-low output polarity when designing interface logic to ensure correct signal interpretation without additional inversion stages.

Part Context

This part belongs to the SN74LV138A family of decoders and demultiplexers manufactured by Texas Instruments. The LV series is characterized by its compatibility with various supply voltages, bridging the gap between older 5V logic standards and lower voltage modern digital systems. The 'A' variant typically denotes updated manufacturing revisions or enhanced performance characteristics compared to earlier generations.

Replacement Considerations

Direct pin-compatible substitutes include other SN74LV138 variants with different packaging options, such as SN74LV138APWR (TSSOP-16) or SN74LV138ADGVR (VSSOP-16). Verify that any replacement maintains the same 3-to-8 decoding functionality and electrical characteristics before implementation.