SN74LV139ADR

Overview

The SN74LV139ADR is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments 74LV series, housed in a 16-pin SOIC package. It operates on a single power supply ranging from 2V to 5.5V and supports mixed-mode voltage operation across all ports. The device incorporates two active-low enable inputs to facilitate cascading and demultiplexing functions. Designed for high-speed memory decoders and data-transmission systems, it features fully buffered inputs that represent only one normalized load to the driving circuit.

Feature Summary

• Supports mixed-mode voltage operation on all ports
• Incorporates two enable inputs to simplify cascading and data reception
• Ioff circuitry enables partial-power-down mode operation

Applications

• High-speed memory decoding
• Data-transmission systems
• Demultiplexing applications

Procurement Notes

Verify the specific ordering suffix 'ADR' corresponds to the SOIC (D) package with tape-and-reel packaging containing 2500 units per reel. Confirm RoHS compliance status and lead finish details via the manufacturer's current Package Option Addendum before finalizing procurement specifications.

Selection Notes

Select this component when a dual 2-to-4 decoder or demultiplexer is required within a 2V to 5.5V supply range. Ensure the application utilizes active-low enable signals and requires mixed-mode voltage compatibility. Verify that the 16-pin surface-mount SOIC footprint aligns with the target PCB layout constraints.

Part Context

This part belongs to the SN74LV139A family of logic devices manufactured by Texas Instruments. The 'SN' prefix indicates standard commercial grade performance, while 'LV' designates low-voltage CMOS technology optimized for high-speed operations. The 'ADR' suffix specifically identifies the SOIC package variant supplied in large tape-and-reel quantities.

Replacement Considerations

Direct replacements include SN74LV139ADBR (SSOP package), SN74LV139APWR (TSSOP package), and SN74LV139ANSR (SOP package). These variants share identical electrical characteristics but differ in physical package dimensions and pin spacing.