How much DC Voltage can be applied at VIN-pin of ESP32 Dev Module?

[GolamMostafa]

I have been using the following ESP32 Dev Module. I am interested to know --
1. Safe range of DC voltage that can be applied at VIN-pin.
2. Does the onboard regulator produce 3.3V from VIN?
3. Are ESP32's pins 5V tolerant?
4. How much is the sink and source current of a pin ESP32?

[MicroController]

https://www.espressif.com/sites/default ... eet_en.pdf
and
https://www.espressif.com/sites/default ... design.zip

1. Safe range of DC voltage that can be applied at VIN-pin.

Disclaimer: DO NOT EXCEED 5V ON Vin. Damage, fire or injury may occur if you do.
If you feel like taking chances, you can try 6 or 7V, but that may quickly burn the "power" LED on the kit.

2. Does the onboard regulator produce 3.3V from VIN?

Yes.

3. Are ESP32's pins 5V tolerant?

NO.

4. How much is the sink and source current of a pin ESP32?

Source: 20/40mA
Sink: 28 mA

[GolamMostafa]

Source: 20/40mA

Does above mean --
20 mA continuous rating at 3.3V ?
40 mA means what?

[MicroController]

See "DC Characteristics" in the datasheet.

Pins powered from the VDD_SDIO power domain only source 20mA, the others source 40mA.