SN74LV138ADBR

Overview

The SN74LV138ADBR is a 3-to-8 line decoder and demultiplexer from Texas Instruments, belonging to the LV logic series. It features three address inputs and eight active-low outputs. The device operates within a supply voltage range of 2 V to 5.5 V and supports surface-mount installation in a 16-pin SSOP package. It functions across an extended temperature range from -40°C to +85°C.

Feature Summary

• Provides decoding and demultiplexing functionality for digital signal routing
• Features two active-low and one active-high enable inputs for precise control
• Supports low-voltage operation compatible with various system power supplies

Applications

• Address decoding for memory and I/O mapping
• Demultiplexing data streams in communication systems
• Control logic in industrial automation equipment

Procurement Notes

Verify the specific package variant against design requirements, as the SN74LV138A family includes multiple form factors such as TSSOP and WQFN. Confirm that the SSOP-16 footprint matches the PCB layout. Ensure the operating temperature range meets the environmental conditions of the final assembly. Cross-reference the datasheet revision to confirm pinout consistency.

Selection Notes

Select this component when a standard 3-to-8 decoding function is required within a mixed-voltage environment. The LV series offers compatibility with both 3.3 V and 5 V logic levels. Consider the SSOP package constraints regarding board space and thermal dissipation. Evaluate the propagation delay specifications against the system timing budget to ensure signal integrity.

Part Context

This part belongs to the SN74LV138A family of decoders and demultiplexers manufactured by Texas Instruments. The family provides standardized logic functions for address decoding and data distribution. Variants differ primarily in packaging options and temperature ratings while maintaining identical logical operations and electrical characteristics defined by the LV series specifications.

Replacement Considerations

SN74LV138APWR: Alternative TSSOP-16 package version. SN74LV138ATPWR: Alternative TSSOP-16 package version.