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Series resistors on I2C lines

Last Updated: January 16, 2012

Why resistors of 330 ohm are required on I2C lines?


The series resistors of 330 ohm added on the I2C lines is to increase the RF noise immunity.

The resistor along with the pin capacitance forms a low pass filter and filters out any high frequency signals which may get coupled to the I2C lines.

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