SN74HCS139DR

Overview

The SN74HCS139DR is a dual 2-line to 4-line decoder/demultiplexer from Texas Instruments, belonging to the HCS logic series. It operates within a supply voltage range of 2 V to 6 V and features a SOIC-16 surface-mount package. The device supports an operating temperature range from -40°C to +125°C with a typical propagation delay of 19 ns.

Feature Summary

• Dual independent decoding or demultiplexing functionality
• Wide supply voltage operation for flexible system integration
• Extended industrial temperature range capability

Applications

• Address decoding in embedded systems
• Data routing in digital control circuits
• Memory chip select generation

Procurement Notes

Verify the specific suffix 'DR' confirms the SOIC-16 package and tape-and-reel shipping configuration. Confirm RoHS compliance status through official datasheets. Ensure the ordering part number matches the required logic family specifications for your design.

Selection Notes

Select this component when low power consumption and wide voltage tolerance are required. The HCS series offers performance comparable to standard HC logic but with improved noise immunity. Verify pin compatibility if replacing legacy parts in existing layouts.

Part Context

This part belongs to the SN74HCS family, designed for high-speed CMOS applications. It provides robust performance across varying supply voltages. The dual decoder architecture allows efficient management of multiple output lines using minimal input pins.

Replacement Considerations

Check SN74HC139 variants for pin-compatible alternatives. Verify that substitute parts meet the same voltage and temperature requirements. Ensure logical function equivalence before implementation.