SN74LV138ANSR

Overview

The SN74LV138ANSR is a low-voltage CMOS 3-line to 8-line decoder/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 5.5 V and features three binary address inputs (A0, A1, A2) and eight active-low outputs (Y0–Y7). The device includes three enable inputs: two active-low (G1A, G1B) and one active-high (G2), which control the decoding state. It utilizes Schottky-clamped inputs for high-speed performance and is housed in a 16-pin SOIC package.

Feature Summary

• Supports wide supply voltage operation from 2 V to 5.5 V
• Features three binary address inputs and eight active-low outputs
• Includes dual active-low and single active-high enable controls
• Utilizes Schottky-clamped inputs for enhanced speed

Applications

• Address decoding for memory and I/O mapping
• Demultiplexing data streams in digital systems
• Control logic in automotive electronic modules

Procurement Notes

Verify the specific suffix 'SR' against the manufacturer's official documentation to confirm tape-and-reel packaging specifications. Ensure the component meets required environmental standards such as RoHS compliance before integration into final assemblies.

Selection Notes

Select this component when a wide operating voltage range including 5 V is required alongside low-power consumption. It serves as a direct functional replacement for standard 74LS138 designs where lower power dissipation and higher noise immunity are necessary.

Part Context

This part belongs to the SN74LV138A series of decoders. It shares logical functionality with other variants like the SN74LVC138A but differs in electrical characteristics and input thresholds. The LV series is optimized for applications requiring compatibility with both 3.3 V and 5 V logic levels.

Replacement Considerations

The SN74LV138APWR is an alternative pin-compatible option available in a TSSOP package. Verify package dimensions and thermal requirements when substituting between SOIC and TSSOP form factors.