SN74HC139N

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 fully buffered inputs and active-low outputs. Typical propagation delay is 10 ns at 5 V, with output drive capabilities of ±4 mA. Maximum input current is 1 μA, and maximum ICC is 80 μA.

Feature Summary

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

Applications

• High-performance memory decoding
• Data-routing applications
• Demultiplexing circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest Package Option Addendum to confirm the exact package type, lead finish, and moisture sensitivity level. Ensure the selected variant matches the required thermal resistance and operating temperature specifications for the target application environment.

Selection Notes

Select this component when low power consumption and fast propagation delays are critical for system performance. The wide operating voltage range allows compatibility with various logic families. Verify that the through-hole PDIP package fits the board layout constraints compared to surface-mount alternatives.

Part Context

This part belongs to the Texas Instruments SNx4HC139 family of dual decoders. It is designed to minimize system decoding effects in high-performance memory systems. The device ensures negligible effective system delay when used with fast-enable memories.

Replacement Considerations

SN74HC139NE4 is a verified equivalent part number within the same PDIP package family.