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Original question:

MCU Selection for a communication moduel

P82B715: RJ11 cable for I2C

Vemana Shankar Raja
Prodigy 10 points

Part Number: P82B715

Hi,

We need to transfer I2C data  less than 1Mbps for up to 5 meters using RJ11 cable is it recommended,

or only Belden cable 9842 similar RS485 with 2 pair twisted cable is mandatory  for Power, SDA, SCL, Gnd 

Regards

Vemana Shankar

  • 0
    Guru 323650 points

    Both Ethernet and RS-485 cables are designed for differential signals. I²C is not differential. When using twisted pairs, ensure that SDA and SCL do not end up in the same pair.

    To reduce crosstalk, use cables where individual pairs are shielded (FTP or S/FTP). The Belden 9842 has only an outer shield.