SN74LV138ANS

Overview

The SN74LV138ANS is a low-voltage CMOS decoder/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 5.5V and features three binary select inputs (A0, A1, A2) and three enable inputs (G1, G2A, G2B). The device provides eight active-low outputs selected by the address inputs when enabled. It is housed in a 16-pin SOIC surface-mount package with an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports operation at low supply voltages ranging from 2V to 5.5V
• Features three binary select inputs for addressing eight distinct output lines
• Includes three independent enable inputs for precise control activation

Applications

• Address decoding for memory and I/O mapping
• Demultiplexing data streams to multiple destinations
• General-purpose digital logic control circuits

Procurement Notes

Verify the specific suffix 'ANS' confirms the SOIC-16 package and industrial temperature grade (-40°C to +85°C). Ensure the order specifies the standard SN74LV138ANS variant rather than automotive or qualified versions unless explicitly required. Confirm RoHS compliance status through official manufacturer documentation prior to procurement.

Selection Notes

Select this component for designs requiring low-voltage compatibility down to 2V. The SN74LV138ANS offers high-speed performance suitable for modern digital systems. Consider the SOIC-16 package for surface-mount assembly constraints. Verify that the three-enable input architecture meets the system's control logic requirements compared to simpler decoder variants.

Part Context

This part belongs to the SN74LV138A family of 3-line-to-8-line decoders and demultiplexers. It is designed for low-voltage applications using CMOS technology. The series provides industry-standard pinouts compatible with previous generations while offering improved power efficiency and speed characteristics for contemporary electronic designs.

Replacement Considerations

Direct replacements include other SN74LV138A variants with different packaging options such as SN74LV138APWR or SN74LV138ADWR. Cross-reference with SN74HC138A for higher voltage tolerance if the 2V lower limit is not required. Verify electrical specifications match before substituting.