1 Mbps CAN transceiver with AEC-Q100 — what that buys the BOM
The receiver hysteresis is specified at 100 mV, which gives clean bus-level discrimination in noisy environments — a common failure point on cheaper CAN parts that lack enough margin on the recessive-to-dominant threshold.
If your MCU runs on 3.3 V logic, the SN65HVD251D's CAN bus pins are 5 V tolerant, but the logic interface (TXD, RXD) expects 5 V levels. A 3.3 V MCU driving TXD directly may not meet the input-high threshold; a level shifter or a 3.3 V CAN transceiver like the SN65HVD230 is the correct fit for that rail. The part does not support CAN FD — it is a classic CAN 2.0 transceiver at 1 Mbps.
No exposed pad, no thermal vias needed — the standard SOIC-8 footprint handles the dissipation.
That means it qualifies for new designs without an obsolescence risk flag.