SN74S139ANSR

Signal Switches, Multiplexers, Decoders Overview

The SN74S139ANSR is a dual 2-to-4-line decoder/demultiplexer manufactured by Texas Instruments. It operates on a single power supply ranging from 4.75V to 5.25V. The device features Schottky-clamped inputs for high performance and is housed in a 16-SOIC package with a width of 5.30mm. It supports surface mount installation and functions within an operating temperature range of 0°C to 70°C. Electrical characteristics include a high-level output current of 400µA and a low-level output current of 8mA.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent 2-to-4-line decoding and demultiplexing functionality
• Schottky clamping utilized for enhanced high-speed performance
• Compatible with standard TTL logic input levels

Signal Switches, Multiplexers, Decoders Applications

• Address decoding in microprocessor-based systems
• Data distribution and signal routing
• Memory chip select generation

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'ANSR' corresponds to the tape-and-reel packaging format and SOIC-16 variant. Confirm RoHS3 compliance status as indicated in official documentation. Check component lifecycle status, as this part may be discontinued or subject to last-time buy restrictions. Ensure the intended application voltage remains strictly within the 4.75V to 5.25V range to maintain electrical integrity.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when Schottky speed is required for 2-to-4 decoding tasks. It serves as a faster alternative to LS series devices but requires a strict 5V supply. Consider pin compatibility with other 74Sxx series parts if upgrading existing designs. Verify that the 16-pin SOIC footprint matches the target PCB layout constraints.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the Texas Instruments 74S (Schottky) logic family, known for high-speed operation compared to standard TTL. The SN74S139 specifically provides two independent decoders within a single package. It is distinct from the SN74LS139, which offers lower power consumption at the cost of speed.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The SN74LS139ANSR is a functional substitute offering similar decoding capabilities with lower power consumption, though it exhibits slower switching speeds. Other 74S series decoders may provide compatible pinouts but require verification of specific electrical parameters.