ZHCSQV1C March 2020 – December 2022 TCAN1463-Q1
PRODUCTION DATA
The supply terminals, VSUP, VIO and VCC, are monitored for undervoltage events. If an undervoltage event occurs the TCAN1463-Q1 enters a protected state where the bus pins present no load to the CAN bus. This protects the CAN bus and system from unwanted glitches and excessive current draw that could impact communication between other CAN nodes on the CAN bus.
If an undervoltage event occurs on VSUP in any mode, the TCAN1463-Q1 CAN transceiver enters the CAN off state.
If an undervoltage event occurs on VCC, the TCAN1463-Q1 remains in normal or silent mode but the CAN transceiver changes to the CAN autonomous active state. During a UVCC event, RXD remains high as long as VIO is present and the wake-up circuitry is inactive. See Figure 9-12. If the undervoltage event persists longer than tUV, the TCAN1463-Q1 transitions to sleep mode.
If an undervoltage event occurs on the VIO, the TCAN1463-Q1 transitions to standby mode. If the undervoltage event persists longer than tUV, the TCAN1463-Q1 transitions to sleep mode.
Once an undervoltage condition is cleared and the supplies have returned to valid levels, the device typically needs 200 μs to transition to normal operation.