SN74LV138APWRE4

Overview

The SN74LV138APWRE4 is a low-voltage CMOS decoder/demultiplexer manufactured by Texas Instruments. It converts three binary inputs to eight mutually exclusive active-low outputs. The device operates within a supply voltage range of 2 V to 5.5 V and features two active-low enable inputs and one active-high enable input for expansion. It is housed in a TSSOP-16 surface-mount package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides decoding or demultiplexing functions with three binary address inputs and eight active-low outputs.
• Includes dedicated enable pins to control device operation, allowing system expansion when cascaded.
• Designed for low-voltage applications with wide power supply compatibility.

Applications

• Address decoding in embedded systems
• Demultiplexing data streams in digital circuits
• Chip select generation in memory interfaces

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free packaging compliant with RoHS standards. Confirm the TSSOP-16 package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Cross-reference the datasheet revision to confirm pinout consistency with existing designs.

Selection Notes

Select this component when a low-power, wide-voltage-range decoder is required. Compare propagation delay specifications against other LV series variants if timing is critical. Verify that the active-low output logic aligns with downstream input requirements. Consider the TSSOP-16 package availability relative to alternative packages like SOIC or SSOP.

Part Context

This part belongs to the SN74LV138A family of 3-to-8 line decoders. It shares functional compatibility with standard 74LV138 devices but includes specific manufacturing variations indicated by the suffix. The E4 suffix typically denotes lead-free construction. It serves as a direct replacement for non-lead-free versions in new designs requiring environmental compliance.

Replacement Considerations

SN74LV138APWR is the non-lead-free equivalent. SN74LV138ADBR offers an SSOP-16 package alternative. SN74LVC138APWR provides LVC series performance with similar pinout.