SN74LV139APWR

Overview

The SN74LV139APWR is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments 74LV series, housed in a 16-pin TSSOP 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 decoding
• Data-transmission systems
• Data-routing applications requiring short propagation delay times

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current Package Option Addendum to confirm status and material type. Ensure the selected variant matches the required moisture sensitivity level and lead finish specifications for your assembly process. Cross-reference the part marking with the official documentation to validate authenticity and production revision.

Selection Notes

Select this component when designing circuits requiring dual independent decoding or demultiplexing within a low-voltage logic family. The 74LV series is suitable for applications needing support for mixed-mode voltage environments. Consider the 16-pin TSSOP package dimensions and thermal resistance characteristics during PCB layout planning to ensure adequate heat dissipation and signal integrity.

Part Context

This device belongs to the SNx4LV139A family of dual 2-line to 4-line decoders/demultiplexers. The 'PW' suffix designates the 16-pin Thin Shrink Small Outline Package (TSSOP). The product line is engineered for performance-critical digital logic applications where low power consumption and fast switching speeds are essential requirements.

Replacement Considerations

SN74LV139ADBR

FAQ

How does the Ioff feature benefit system design?

The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down, which supports partial-power-down mode operation.

What is the function of the G input pins?

The active-low enable (G) inputs can be used as data lines in demultiplexing applications or to control the output state of each decoder channel independently.