MC33790HEGR2

Sensor And Detector Interfaces Overview

The MC33790HEGR2 is a dual-channel Distributed System Interface (DSI) physical layer interface IC designed for automotive and industrial applications. It supports bidirectional communication between master and slave devices using SMARTMOS technology. The device operates with a logic supply voltage (VDD) of 4.75 V to 5.25 V and a bus supply voltage (VSUP) ranging from 8.0 V to 25.0 V. It features two independent DSI-compatible buses, supporting communication rates up to 150 kbps. Key electrical characteristics include an output high voltage of 4.175 V to 4.825 V, an output low voltage of 1.325 V to 1.675 V, and a return current threshold of -5.0 mA to -7.0 mA. The component provides 2.0 kV ESD capability and includes internal thermal shutdown and current limit protection.

Sensor And Detector Interfaces Feature Summary

• Dual independent DSI compatible buses for simultaneous communication channels
• Wave-shaped bus output voltage generation for reliable signal transmission
• Integrated on-board charge pump for transmitter gate drive
• Independent thermal shutdown and current limit protection per channel

Sensor And Detector Interfaces Applications

• Remote control and sensing systems
• Automotive, aircraft, marine, and industrial controls
• Heating and air-conditioning systems

Sensor And Detector Interfaces Procurement Notes

Verify the ordering suffix 'EG' indicates lead-free packaging compliance with JEDEC standards. Confirm the package type matches the 16-pin SOICW outline specified in the datasheet. Ensure the temperature range meets the application requirements of -40 °C to 85 °C. Cross-reference the document number MC33790 Rev 13.0 for accurate specifications.

Sensor And Detector Interfaces Selection Notes

Select this component when a dual-channel DSI physical interface is required for automotive or industrial networks. It is suitable for designs needing isolated bus drivers with integrated protection features. Consider the 16-pin SOICW package constraints and the need for external capacitors on the CPCAP pin for charge pump stability during implementation.

Sensor And Detector Interfaces Part Context

The MC33790 series serves as a physical layer interface for the Distributed System Interface (DSI) bus protocol. It bridges standard logic levels to the higher voltage and current requirements of the DSI bus. The device enables efficient communication in distributed architectures by eliminating the need for additional wiring for sensor power in some configurations.

Sensor And Detector Interfaces Replacement Considerations

The MC33790DW/R2 is listed as a similar part number within the same product family. Verify pinout compatibility and electrical specifications before substitution. Ensure the replacement part meets the same automotive and environmental requirements.

Sensor And Detector Interfaces FAQ

What is the function of the CPCAP pin?

The CPCAP pin is used to store and filter the output of the on-board charge pump. An external capacitor connected to this pin acts as a charge reservoir to maintain the stepped-up voltage needed for driving the transmitter FETs.

How does the device protect against short circuits?

Each DSIxO output has independent thermal shutdown and current limit circuitry. If a short occurs, the thermal shutdown activates at approximately 160-170 °C, disabling the output driver until the temperature drops below 155 °C.

What are the logic input thresholds for DSIxF and DSIxS?

The logic input thresholds for DSIxF and DSIxS pins typically range from 1.10 V to 2.20 V, allowing compatibility with standard 0 V to 5.0 V logic levels.