SN74LV139ADBR

Overview

The SN74LV139ADBR is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments 74LV series, housed in a 16-pin SSOP 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 simplify cascading and data reception 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/or data reception
• Ioff circuitry supports partial-power-down mode operation

Applications

• High-speed memory decoders
• Data-transmission systems
• Partial-power-down applications

Procurement Notes

Verify the specific ordering suffix 'DBR' corresponds to the SSOP (DB) package with a 2000-unit large tape and reel quantity. Confirm the RoHS status is compliant and check the moisture sensitivity level rating before procurement. Ensure the operating temperature range meets the -40°C to 85°C requirement for the intended application environment.

Selection Notes

Select this component when a dual 2-to-4 decoding function is required within a compact SSOP footprint. It is suitable for designs needing mixed-voltage port compatibility and simplified cascading via dedicated enable pins. Verify that the propagation delay characteristics at the target supply voltage meet the system timing requirements.

Part Context

This part belongs to the SN74LV139A family of dual decoders/demultiplexers. The 'D' indicates the base SOIC/SSOP logic family, while 'B' specifies the SSOP package type. The 'R' denotes tape and reel packaging. It shares functional specifications with other LV139A variants but differs in physical dimensions and shipping quantities.

Replacement Considerations

SN74LV139ADBR.A