DS36C278TMX/NOPB

Overview

The DS36C278TMX/NOPB is a low-power CMOS differential transceiver compliant with the RS-485 standard and compatible with TIA/EIA-422-B. It features one driver and one receiver in an 8-pin SOIC package, operating at a supply voltage of +5V (range +4.75V to +5.25V). The device supports a wide common mode range from -7V to +12V and includes thermal shutdown protection. It operates within a temperature range of 0°C to +70°C. Key electrical parameters include a maximum power supply current of 500 μA, a differential output voltage up to 5.0V, and propagation delays of up to 80 ns for the driver and 400 ns for the receiver.

Feature Summary

• Low power CMOS design with guaranteed interoperation across RS-485 devices
• Built-in power-up/down glitch-free circuitry for live insertion and displacement
• On-board thermal shutdown circuitry prevents damage during excessive power dissipation
• Receiver open input fail-safe guarantees a high output state when inputs are left open

Applications

• Multipoint data transmission systems requiring RS-485 compliance
• Battery-powered or power-conscious industrial applications
• Bus/line communication interfaces supporting extended node counts via quarter unit load configuration

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package type, temperature rating, and environmental compliance status. Confirm that the component meets all necessary regulatory standards for the intended deployment environment before finalizing procurement orders.

Selection Notes

Select this component for designs requiring a single half-duplex transceiver with robust fault protection. Ensure the application operates within the specified +4.75V to +5.25V supply range and the 0°C to +70°C commercial temperature limits. Verify that the bus topology aligns with the device's quarter unit load capability for increased node density.

Part Context

This part belongs to the DS36C278 family of low-power multipoint EIA-RS-485 transceivers manufactured by Texas Instruments. It serves as a drop-in replacement for legacy components such as the LTC485, MAX485, DS75176, and DS3695, offering improved power efficiency while maintaining compatibility with existing bipolar and ALS interface circuits.

Replacement Considerations

Publicly confirmed direct replacements include the DS36C278M/NOPB, DS36C278MX/NOPB, and DS36C278TM/NOPB. These variants share identical functional specifications but may differ in packaging quantities, lead finish options, or specific temperature grade classifications.