SN74LV138APW

Overview

The SN74LV138APW 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 utilizes a TSSOP-16 surface-mount package and supports an operating temperature range from -40°C to +85°C. It includes two active-low and one active-high enable inputs for flexible system control.

Feature Summary

• Provides decoding or demultiplexing functions with three binary address lines controlling eight distinct output channels.
• Features multiple enable inputs, including two active-low and one active-high, to manage device activation states.
• Operates across a wide supply voltage spectrum from 2 V to 5.5 V, ensuring compatibility with various logic families.

Applications

• Address decoding in embedded systems
• Demultiplexing data streams in communication interfaces
• Chip select generation in memory architectures

Procurement Notes

Verify the specific suffix 'PW' corresponds to the TSSOP-16 package variant when sourcing. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the operating temperature grade matches your environmental constraints, as industrial variants may differ from commercial grades.

Selection Notes

Select this component when a low-voltage 3-to-8 decoder is required with flexible enable logic. Compare propagation delay specifications against your system timing requirements. Consider the TSSOP-16 footprint availability and thermal performance relative to alternative packages like SOIC or WQFN if space constraints exist.

Part Context

This part belongs to the SN74LV138A family of low-voltage logic devices. It serves as a standard solution for address decoding and signal routing in portable and battery-operated electronics. The LV series offers improved power efficiency compared to older CMOS technologies while maintaining robust noise immunity.

Replacement Considerations

Check for direct pin-compatible alternatives such as the SN74LV138APWR or SN74LV138ADGVR. Verify that substitute parts maintain identical voltage ranges and enable logic polarity to ensure seamless integration without circuit redesign.