The UM3851 is a high-speed CAN transceiver that provides an interface between a Controller Area Network (CAN) protocol controller and the physical two-wire CAN bus. The transceiver is designed for high-speed CAN applications in the automotive industry, providing differential transmit and receive capability to (a microcontroller with) a CAN protocol controller. The UM3851 offers improved ElectroMagnetic Compatibility (EMC) and ElectroStatic Discharge (ESD) performance, and also features:

• Ideal passive behavior to the CAN bus when the supply voltage is off.

• UM3851S8 and UM3851DA can be interfaced directly to microcontrollers with supply voltages from 3.3V or 5V supply voltage.

The UM3851 implements the CAN physical layer as defined in ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5. This implementation enables reliable communication in the CAN FD fast phase at data rates up to 5 Mbit/s. These features make the UM3851 an excellent choice for all types of HS-CAN networks, in nodes that do not require a standby mode with wake-up capability via the bus. 

- ISO 11898-2:2016 and SAE J2284-1 to SAE J2284-5 compliant

- Timing guaranteed for data rates up to 5 Mbit/s in the CAN FD fast phase

- Suitable for 12V and 24V systems

- V_IO input on UM3851S8 and UM3851DA allows for direct interfacing with 3.3V or 5V

  microcontrollers (available in SOP8 and very small DFN8 packages respectively)

- EN input on UM3851S8E allows the microcontroller to switch the transceiver to a very low-current Off mode

- Transceiver disengages from the bus when not powered up (zero load)

- High ElectroStatic Discharge (ESD) handling capability on the bus pins

- Transmit Data (TXD) dominant time-out function

- Undervoltage detection on pins V_CC and V_IO

- Automotive industry

- Industrial