Tudi MCP2551T-I/SN-TUDI

MCP2551 has two operating modes selectable via the STB pin: normal mode and standby mode. In normal mode, the CAN driver and receiver are fully operational and CAN communication is bidirectional. In standby mode, the CAN driver and receiver are shut down to reduce system power consumption; a high level on the STB pin activates the low-power receiver and wake-up filter — once a dominant bus level exceeding tBUS is detected, the RXD pin will go low. The SPLIT pin provides a 0.5VCC DC regulated voltage source, active only in normal mode; by connecting to the midpoint of the termination load, it stabilizes the recessive common-mode voltage and ensures EME performance. In standby mode, the bus is monitored by a low-power differential comparator; upon detection of a dominant bus level with duration greater than tBUS, the RXD pin goes low. The output driver is protected against overheating: when the detected temperature exceeds 165°C, the output driver is disabled and recovers when the temperature falls below the typical 165°C with TXD in the recessive state. The "TXD dominant timeout" timer circuit prevents the bus from entering a sustained dominant state; if the TXD pin remains low beyond the internal timer value, the transceiver is disabled, and the timer is reset by the rising edge of TXD. The TXD dominant timeout period defines the minimum allowable bit rate as 40 kBaud. The TXD and STB pins provide pull-up to VCC; when VCC is powered down, the TXD, STB, and RXD pins enter a floating state to prevent reverse current flow.

• Meets ISO-11898 physical layer requirements
• Compatible with 12V and 24V systems
• Unpowered transceiver disconnects from bus (zero load)
• Powered-down nodes or ignition-off events do not disturb CAN bus
• Low-current standby operation
• Protection against damage from short-circuit conditions (positive and negative battery voltage)
• High-voltage transient protection
• Automatic thermal shutdown protection
• Supports up to 112 nodes
• High noise immunity due to differential bus
• Temperature range: Industrial (0): -40°C to +85°C; Extended (E): -40°C to +125°C
• Supports 1 Mb/s operation
• Common-mode voltage regulation stabilizes recessive bus level and improves EME
• Bus pins and SPLIT pin tolerate power supply or ground levels
• Thermal protection