SN74HC139ANSR

Overview

The SN74HC139ANSR is a dual 2-to-4 line decoder/demultiplexer from Texas Instruments, belonging to the HC logic family. It features fully buffered inputs and low-power CMOS construction. The device operates within a supply voltage range of 2V to 6V and supports a wide operating temperature range from -40°C to +85°C. Packaged in a 16-pin SOIC (NS) surface-mount format, it provides two independent decoders with active-low outputs and enable inputs.

Feature Summary

• Dual independent 2-to-4 line decoding capability
• Active-low outputs for direct interfacing
• Low input current characteristics

Applications

• Memory address decoding
• Data routing systems
• Industrial control logic

Procurement Notes

Verify the specific suffix 'ANSR' against the manufacturer's official documentation to confirm package type, tape-and-reel specifications, and RoHS compliance status. Ensure the component matches the required operating temperature range and voltage specifications for the target application environment before procurement.

Selection Notes

Select this component when a dual decoder configuration is required in a surface-mount design. The HC series offers high-speed operation suitable for general-purpose digital logic applications. Consider the 16-pin SOIC footprint constraints and ensure adequate thermal management for the intended operating conditions.

Part Context

This part belongs to the standard 74HC139 family of decoders. It serves as a complementary solution to other logic families like LS or HCT, offering lower power consumption while maintaining compatible logic levels. The SN prefix indicates a commercial grade device manufactured by Texas Instruments.

Replacement Considerations

Compatible substitutes include SN74HC139DR and SN74HC139PWR. Verify pinout compatibility and electrical parameters such as propagation delay and output drive strength before substitution.