ZHCSO44D August 2023 – October 2024 TCAN1044A-Q1
PRODUCTION DATA
The supply pins, VCC and VIO, have undervoltage detection that places the device into a protected state. This protects the bus during an undervoltage event on either supply pin.
| VCC | DEVICE STATE | BUS | RXD PIN |
|---|---|---|---|
| > UVVCC | Normal | Per TXD | Mirrors bus |
| < UVVCC | Protected | High impedance | High impedance |
| VCC | VIO | DEVICE STATE | BUS | RXD PIN |
|---|---|---|---|---|
| > UVVCC | > UVVIO | Normal | Per TXD | Mirrors bus |
| < UVVCC | > UVVIO | STB = High: Standby Mode | Weak biased to GND | VIO: Remote wake request See Remote Wake Request via Wake-Up Pattern (WUP) in Standby Mode |
| STB =Low: Protected Mode | High impedance | Recessive | ||
| > UVVCC | < UVVIO | Protected | High impedance | High impedance |
| < UVVCC | < UVVIO | Protected | High impedance | High impedance |
Once the undervoltage condition is cleared and tMODE has expired the TCAN1044A-Q1 will transition to normal mode and the host controller can send and receive CAN traffic again