3.3V supply and 5V logic compatibility — the practical answer
It is not a 5V-tolerant CAN transceiver; the bus pins are CANH and CANL, which are differential and tolerate common-mode voltages per the CAN standard, but the VCC pin and logic interface (TXD, RXD) expect 3.3V levels. If your microcontroller runs on 5V I/O, you need level translation or a different transceiver rated for 5V supply. The 120 mV hysteresis helps with signal integrity on noisy buses, but it doesn't change the supply requirement.
SOT-23-8 package — board area and layout notes
Housed in a SOT-23-8 package (Supplier Device Package: SOT-23-8), this transceiver occupies minimal PCB real estate — roughly 2.9 mm x 2.8 mm footprint. Surface-mount only, no exposed pad. The small package means the decoupling capacitor needs to sit close; a 100 nF ceramic within 2 mm of the VCC pin is the usual practice. No thermal vias required at the current draw of a CAN transceiver, but keep the CANH/CANL traces short to the connector and avoid stubs.
The base product number is TCAN337, covering the family; this specific suffix (GDCNT) denotes the SOT-23-8 package and tape-and-reel / cut-tape delivery.
