The SN65HVD1040HD: It handles one driver and one receiver, with the supply rail running from 4.75V to 5.25V — a straight 5V part, so check your rail budget before dropping it into a 3.3V-only system. The 125 mV receiver hysteresis gives decent noise margin on a loaded bus, which matters when you are routing CAN through a motor drive bay or a factory floor.
Temperature range — the standout spec
That 175°C ceiling puts it in the territory of downhole tools, engine-mounted ECUs, and military vehicle electronics where the ambient underhood or near the exhaust manifold can spike. The storage range is wider still, but the operating number is what governs the design.
Package and mounting — field-swap reality
Surface mount only, so swapping it on site means hot air or a reflow station; it is not a socketed DIP you can pop in a parking lot. Orientation is unambiguous with the pin-1 mark, so a careful tech with a hot-air pencil can do the swap without a lab bench.
That means you can specify it into a new design today without planning an obsolescence workaround. No stock-count or lead-time number belongs here, but the channel is open.