SN65HVD231DR

The SN65HVD230, SN65HVD231, and SN65HVD232 CAN transceivers comply with the ISO 11898-2 high-speed CAN physical layer standard (transceiver) specification. These devices are designed for applications with data rates up to 1 Mbps and incorporate numerous protection features to ensure the robustness of both the device and the CAN network. The SN65HVD23x transceivers are designed for use with 3.3V microprocessors, MCUs, and DSPs equipped with CAN controllers, or equivalent protocol controllers. These devices are suitable for applications employing a CAN serial communication physical layer compliant with ISO 11898. These devices are particularly well-suited for harsh environments, featuring bus wire protection, loss-of-ground and overvoltage protection, overtemperature protection, and a wide common-mode operating range. CAN transceivers are CAN physical layer devices that serve as the interface between a single-ended host CAN protocol controller and the differential CAN bus in industrial, building automation, and automotive applications. These devices operate over a common-mode voltage range of -2V to 7V on the bus and can withstand common-mode transient voltages of ±25V. The SN65HVD230 and SN65HVD231 provide three distinct operating modes via the Rs pin (pin 8): high-speed mode, slope control mode, and low-power mode. Connecting the Rs pin to ground selects high-speed mode, which allows the transmitter output transistors to switch on and off as fast as possible with no limitation on rise and fall slopes. Alternatively, the rise and fall slopes can be adjusted by connecting a resistor in series between the RS pin and ground. The slope is proportional to the output current at the pin. With a resistance of 10 kΩ, the device's slew rate is approximately 15 V/μs; with a resistance of 100 kΩ, the slew rate is approximately 2 V/μs. When a logic high is applied to the Rs pin, the SN65HVD230 enters a low-current standby mode (listen-only). In this mode, the driver is disabled while the receiver remains active. This mode consumes less power than normal mode while still allowing the CAN controller to monitor bus activity to determine whether the transceiver should be returned to normal or slope control mode. When the device needs to transmit a message onto the bus, or when a bus indication is received in standby mode that requires the device to be ready for transmission again, the host controller (MCU, DSP) returns the device to transmit mode (high-speed mode or slope control mode). The difference between the SN65HVD230 and SN65HVD231 is that when a logic high is applied to the RS pin, both the driver and receiver in the SN65HVD231 are disabled. In this sleep mode, no communication can occur between the device and the bus. The device remains in sleep mode until it is reactivated by applying a logic low to the Rs pin.

Applications

• Industrial automation, control, sensors, and drive systems
• Motor and robotics control
• Building and temperature control (HVAC)
• Telecom and base station control and status
• CAN bus standards, e.g. CANopen, DeviceNet, and CAN Kingdom

Key features

• Single 3.3V supply operation
• Compliant with ISO 11898-2
• Low-power replacement for PCA82C250 package
• Bus pin ESD protection exceeding ±16kV HBM
• High input impedance supporting up to 120 nodes per bus
• Adjustable driver slew rate for improved radiated emissions performance
• SN65HVD230: low-current standby mode – 370μA (typical)
• SN65HVD231: ultra-low-current sleep mode – 40nA (typical)
• Designed for data rates up to 1Mbps
• Thermal shutdown protection
• Open-circuit fail-safe design
• Glitch-free power-up and power-down for hot-plug applications