I want to connect a 433MHz RF receiver running at 5V to an Arduino running at 3.3V, or do I have to build a resistor / diode clamp. Some (PIC) MCUs have 5V tolerant input pins but I'm new to AVR & Arduino's. Bonus question, are any inputs better suited to capture? e.g. IR or PWM (on PIC it's calle…

Are any ATmega328P input pins 5V tolerant when VCC is 3.3V?

Topic		Replies	Views
5V signal connected to a 3,3V Arduino General Electronics	5	1393	May 6, 2021
Interfacing External MCUs and Peripherals 5V-3.3V Interfacing	3	2557	May 6, 2021
Are the input pins protected against high voltage? General Electronics	7	2148	May 6, 2021
What will the voltage be at my input pin? Frequently-Asked Questions	6	1590	May 6, 2021
Analog Input Pins - Max voltage Interfacing	6	31272	May 6, 2021