SN74HC139N-NG

Overview

The SN74HC139N is a dual 2-line to 4-line decoder/demultiplexer in a 16-pin PDIP package. It operates on a supply voltage of 2 V to 6 V with an operating temperature range of -40°C to 85°C. The device features active-low outputs and incorporates two enable inputs for cascading or data reception. Typical propagation delay is 10 ns, with low power consumption of 80 μA max ICC.

Feature Summary

• Designed specifically for high-speed memory decoders and data-transmission systems
• Incorporates two enable inputs to simplify cascading and/or data reception
• Outputs can drive up to 10 LSTTL loads

Applications

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

Procurement Notes

Verify the exact part number against the manufacturer's current orderable addendum to confirm production status and availability. Ensure the selected package variant matches the required PCB footprint and mounting style. Check for specific environmental certifications if applicable to the end application.

Selection Notes

Select this component when a dual 2-to-4 decoder with active-low outputs is required. Consider the HC logic family for compatibility with standard CMOS interfaces. Verify that the operating voltage range and temperature specifications align with the system requirements.

Part Context

This device belongs to the Texas Instruments SNx4HC139 series, which includes variants in SOIC, SSOP, TSSOP, CDIP, CFP, and LCCC packages. The SN74HC139N specifically denotes the commercial grade version in a 16-pin plastic dual in-line package.

Replacement Considerations

SN74HC139NE4

FAQ

Can the enable input be used as a data line?

Yes, the active-low enable (G) input can be used as a data line in demultiplexing applications.

What is the output state when disabled?

When the outputs are not disabled by the strobe input, only the selected output is low while all others are high.