CAN bus transceiver for the 3.3 V automotive and industrial bus
The receiver includes 100 mV of hysteresis, which helps reject noise on a loaded bus — a practical margin when the wiring is long or the ground reference drifts.
What the 1 Mbps data rate and 100 mV hysteresis mean on the bus
The 1 Mbps data rate matches the CAN 2.0B high-speed standard, so this part slots directly into a classic 500 kbps or 1 Mbps CAN network without bottlenecking the frame rate. The 100 mV receiver hysteresis gives the bus a clean differential threshold — on a long stub or a noisy production line, that hysteresis keeps the transceiver from toggling on ground bounce or coupled transients. If the bus is heavily loaded with many nodes, the hysteresis helps maintain a deterministic recessive-to-dominant transition.
Supply rail and 5 V microcontroller compatibility
If the system uses a 5 V microcontroller, the CAN controller's TX and RX pins must be level-shifted or the MCU must tolerate 3.3 V logic. The SN65HVD230QD's digital I/O are 3.3 V-tolerant, but feeding 5 V logic directly into the TXD pin exceeds the absolute maximum — a simple resistive divider or a 3.3 V-tolerant GPIO handles the interface. The transceiver itself does not require a 5 V supply; the CAN bus differential signals are generated from the 3.3 V rail per the ISO 11898 standard.