
SIT
SIT2551T is a close CAN transceiver candidate for SIT1040T, but pinout must be checked.
SIT1040T is a 5V 1Mbps CAN transceiver in SOP8. SIT2551T is the only close catalog candidate found, pending pinout review.
ESD, standby and bus differential need checks
SOP8 and 8 pins match
No firmware change expected for CAN PHY
SIT2551T lifecycle is '-'
No verified pin-compatible replacement is proven from the provided fields.
Review SIT2551T first as a same-vendor CAN transceiver candidate.
Pinout and low-power standby behavior are not confirmed.

SIT
SIT2551T is a close CAN transceiver candidate for SIT1040T, but pinout must be checked.
| Feature / factor | SIT1040T | SIT2551T | Alt 2 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Interface | CAN | CAN | CAN — same bus role | ||
| Package | SOP8, 8 pin | SOP8, 8 pin | SOP8, 8 pin — same form | ||
| Pinout | not provided | not provided | not provided — must verify | ||
| Voltage | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V — same supply | ||
| Temperature | -40C to 125C | -40C to 125C | -40C to 125C — same range |
SIT2551T is the best provided candidate, but it needs FAE review before use.