Hi guys, i'm using this RTC M41T62 from ST and i was wondering how i could wire it with the arduino. It has a SCL and SDA pins, should i directly connect them with arduino or do i need pull-up resistors or any additional hardware? Thanks!
This RTC has a supply voltage range of 1.3 V to 4.4 V so it should not be connected to 5V.
You always need pullups on an I2C bus.
Both SDA and SCL are bidirectional lines, connected to a positive supply voltage via a pull-up resistor When the bus is free, both lines are HIGH. The output stages of devices connected to the bus must have an open-drain or open-collector to perform the wired-AND function.