Other Parts Discussed in Thread: TUSB320,
Tool/software:
Hello,
There seems to be some contradictory information regarding whether the ID pin on the TUSB320L/HAI parts is fail-safe. The following E2E post says that the ID pin is not a fail-safe pin:
Additionally, in the datasheet, the Abs Max Voltage Rating on the ID pin is listed as VDD + 0.3. This would seem to indicate it is not fail-safe. However, the ID pin is also not listed as one of the non-fail-safe pins in the following section of the datasheet, suggesting it is fail-safe:
When VDD is off, the TUSB320 non-failsafe pins (VBUS_DET, ADDR, PORT, OUT[3:1] pins) could back-drive the TUSB320 device if not handled properly. When necessary to pull these pins up, it is recommended to pullup PORT, ADDR, and INT_N/OUT3 to the device VDD supply.
Finally, Table 2-1 in the Typical Application Issues for TUSB32x and HD3SS3220 CC Controller Devices app note says that all of TI's 3rd gen CC controllers including the TUSB320LAI have fail-safe ID pins.
Can you please clarify if the ID pin for the TUSB320L/HAI is fail-safe or not?
Thanks!