App note: Sending I2C-bus signals via long communications cables

Posted on Sunday, June 22nd, 2014 in app notes by DP


Extend I2C communication distance with this app note (PDF) from NXP.

Reliable I2C-bus communication at high data rates, and over many meters, can be achieved using widely available twisted- pair communication cable (e.g. Category 5e and similar 4-pair cables, as typically used for Ethernet communications).
The two bidirectional I2C-bus signals, SDA and SCL, are split into four unidirectional signals using P82B96 or PCA9600. Each signal is then transmitted over a separate twisted pair within the communication cable and combined again by another P82B96.

This entry was posted on Sunday, June 22nd, 2014 at 1:00 pm and is filed under app notes. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • Cody: Yes please
  • Edward Mallon: I've been oversampling those thermistors with the ADC and some pin-toggle noise for a while now, and that method is good. But lately I've been...
  • Marko: armature -> amateur
  • Crawford: Dibs,
  • bill: a sunny Sunday here