DS36C280M/NOPB

Overview

The DS36C280M/NOPB is a low-power CMOS RS-485 transceiver in an SOIC-8 package. It operates at a supply voltage of +4.75V to +5.25V with a maximum quiescent current of 500 μA. The device supports a wide common mode range from −7V to +12V and features adjustable slew rate control via an external resistor on Pin 2. It guarantees interoperation with RS-485 standards, includes thermal shutdown protection, and offers a fail-safe receiver for open inputs. The component is designated as obsolete by the manufacturer.

Feature Summary

• Adjustable Slew Rate Control: Allows user-defined driver edge rates using an external resistor to minimize electromagnetic interference (EMI).
• Low Power Operation: Utilizes CMOS technology to achieve a maximum quiescent current of 500 μA, suitable for power-conscious applications.
• Fail-Safe Receiver: Guarantees a high logic output state when differential bus inputs are left open or non-terminated.
• Thermal Shutdown Protection: Automatically forces driver outputs into a high-impedance state to prevent damage during excessive power dissipation.

Applications

• Multipoint data transmission networks requiring EMI reduction through controlled signal edge rates.
• Battery-powered industrial systems where low standby current consumption is critical.
• Communication buses operating under extreme common mode voltage conditions ranging from -7V to +12V.

Procurement Notes

Verify the obsolete status of this component before initiating any design-in process. Confirm that existing inventory sources can provide sufficient quantities for production needs, as new manufacturing is discontinued. Ensure that the specific SOIC-8 package variant matches the required footprint and pinout for the target application board.

Selection Notes

Select this device when minimizing electromagnetic emissions is a priority over maximum data throughput. The adjustable slew rate feature requires an external resistor, which adds bill-of-materials complexity compared to fixed-rate alternatives. Verify that the resulting data rate limitations imposed by the chosen slew rate setting remain compatible with the system's communication requirements.

Part Context

This component belongs to the DS36C2xx series of RS-485 transceivers manufactured by Texas Instruments. It shares functional similarities with the DS36C278 and DS36C279 but distinguishes itself through the inclusion of the slew rate control pin. The series is designed to replace older bipolar transceivers while maintaining full compatibility with standard RS-485 electrical specifications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Texas Instruments replacement guides or contact sales representatives directly for qualified alternative components.