SN74LVC138APWE4

Overview

The SN74LVC138APWE4 is a low-voltage CMOS 3-to-8 line decoder/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 3.6 V and features three address inputs and eight active-low outputs. The device utilizes a TSSOP-16 surface-mount package and supports a propagation delay of 6.7 ns. It functions across an industrial temperature range from -40°C to +85°C and includes two active-low and one active-high enable inputs for flexible system control.

Feature Summary

• Provides decoding or demultiplexing functionality with three binary address lines controlling eight distinct output channels.
• Incorporates dedicated enable logic requiring specific input states to activate the selected output channel.
• Designed for low-voltage digital systems, ensuring compatibility with modern microcontroller and processor interfaces.

Applications

• Address decoding in embedded memory subsystems
• Demultiplexing data streams in communication interfaces
• Chip select generation for peripheral devices

Procurement Notes

Verify the suffix E4 indicates lead-free composition and RoHS compliance when sourcing. Confirm the APWE4 designation corresponds to the TSSOP-16 package variant. Ensure the component meets the required operating temperature specifications for your specific application environment before finalizing procurement.

Selection Notes

Select this component for applications requiring low-power operation at voltages below 3.3 V. The LVC series offers faster switching speeds compared to standard LV counterparts while maintaining lower power consumption. Verify that the TSSOP-16 footprint aligns with your PCB layout constraints and thermal management requirements.

Part Context

This part belongs to the SN74LVC138A family of decoders. The E4 suffix denotes environmental compliance, specifically lead-free manufacturing processes. It serves as a direct replacement for non-compliant variants within the same logical family, maintaining identical electrical characteristics and pinout configurations.

Replacement Considerations

SN74LVC138APWR is a compatible alternative offering identical electrical performance in a tape-and-reel packaging format suitable for high-volume automated assembly processes.