SN74LV138ATNSR

Overview

The SN74LV138ATNSR is a 3-line to 8-line decoder and demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V. The device features TTL-voltage compatible inputs and supports partial-power down mode via Ioff functionality. It is housed in a 16-pin SOIC package with surface-mount installation style.

Feature Summary

• Provides decoding and demultiplexing functions for three binary inputs to eight active-low outputs
• Includes two active-low and one active-high enable inputs for precise control
• Inputs are compatible with TTL voltage levels
• Supports partial-power down operation through Ioff circuitry

Applications

• Address decoding in embedded systems
• Memory expansion architectures
• Data routing applications

Procurement Notes

Verify the specific suffix NSR against official Texas Instruments documentation to confirm tape-and-reel packaging specifications. Ensure the operating temperature range and logic family LV-A characteristics match the design requirements before procurement.

Selection Notes

Select this component when a 4.5-V to 5.5-V supply is available and TTL-compatible input thresholds are required. The LV-A series offers improved performance over standard LV variants while maintaining compatibility with legacy interfaces.

Part Context

This part belongs to the SN74LV138A logic family, which consists of high-speed CMOS decoders. The LV-A series provides enhanced switching speeds compared to standard LV devices while retaining low power consumption characteristics suitable for portable electronics.

Replacement Considerations

SN74LV138ADBR and SN74LV138ATPWR are alternative packages within the same functional family. Verify pinout compatibility and package dimensions before substitution.