SI85833D-ISR

Drivers, Receivers, Transceivers Overview

The SI85833D-ISR is a half-duplex isolated RS-485 transceiver from the Si858x family, manufactured by Skyworks Solutions. It integrates a robust RS-485 transceiver with silicon isolation technology, supporting signaling rates up to 1 Mbps. The device operates with a logic supply voltage (VDD1) of 2.5 V to 5.5 V and a transceiver supply voltage (VDD2) of 3.0 V to 5.5 V. It provides 5 kV RMS isolation per UL 1577 standards and features a minimum common-mode transient immunity (CMTI) of 100 kV/µs. Electrical characteristics include a typical driver propagation delay of 10 ns and receiver propagation delay of 42 ns at 3.3 V rated operation. The component is housed in a WB SOIC-16 package.

Drivers, Receivers, Transceivers Feature Summary

• Integrates RS-485 transceiver functionality with digital isolation using proprietary silicon oxide technology for high noise immunity.
• Provides bus fault protection up to ±30 V and HBM ESD ratings of 15 kV on bus pins to ensure reliability in harsh environments.
• Includes thermal shutdown protection and fail-safe receiver circuitry to maintain signal integrity during fault conditions.
• Supports unit loading of up to 256 transceivers on the bus, compatible with standard RS-485 protocols.

Drivers, Receivers, Transceivers Applications

• Industrial automation systems
• Programmable logic controllers (PLCs)
• Isolated switch mode power supplies
• Data acquisition systems

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'ISR' corresponds to the reel packaging format when sourcing components. Confirm that the 3.3 V rated variant matches the system's VDD2 requirements. Ensure compliance with RoHS directives and check for any pending safety regulatory approvals relevant to the target market before finalizing procurement specifications.

Drivers, Receivers, Transceivers Selection Notes

Select this half-duplex model for applications requiring single-ended bus communication with galvanic isolation. Compare the 1 Mbps data rate capability against higher-speed variants like the SI85835 if faster throughput is needed. Ensure the selected part supports the required VDD2 voltage range, as this specific model is optimized for 3.3 V transceiver supply operation within the broader Si858x family.

Drivers, Receivers, Transceivers Part Context

The SI85833D-ISR belongs to the Si858x series of integrated isolated RS-485 transceivers. This family combines standard RS-485 interface capabilities with high-reliability digital isolation. The series offers both half-duplex and full-duplex configurations with varying data rates, designed to replace traditional optocoupler solutions in industrial networking applications.

Drivers, Receivers, Transceivers Replacement Considerations

SI85833D-IS is the tube-packaged equivalent of this reel-based component. Other family members such as SI85835D-ISR offer 10 Mbps speeds but may require different slew rate considerations.