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TCAN1043-Q1: The UV protect of TCAN1043

Yao Zeng
Prodigy 100 points
Part Number: TCAN1043-Q1
Other Parts Discussed in Thread: TCAN1043, TCAN1043A-Q1

Hi,TI partener:

    1.   What's the exact time of "UV time"？ 100ms or 200ms?

    2. In the use case below, how will the level of INH change? Does the voltage of INH vary periodically between high level and high impedance state?

Use case:Local TCAN1043 is in sleep mode. Then, there are periodic wake-up messages on CAN BUS from another CAN node. TCAN1043 awakened by message and INH goes high level, but the MCU doesn't power on VCC and VIO. The TCAN1043 detects UV on VCC and VIO, then what will happen to TCAN1043? Does it enter sleep mode and the INH pin goes into a high impedance state?
  • 0
    TI__Mastermind 19050 points

    Hi Yao,

    1. Please find tUV in datasheet.

    2. The TCAN1043A-Q1 will power up into Standby mode (because VSUP still supplied) and then transition to Sleep mode again because VCC and VIO are not supplied and the under voltage flags will be asserted. INH pin goes into a high impedance state.

    Regards,

    Sean