# Spread I2C signal over 2m thanks to a PCA9615 module

**URL:** <https://forum.digikey.com/t/spread-i2c-signal-over-2m-thanks-to-a-pca9615-module/13784>\
**Category:** Integrated Circuits (ICs)\
**Tags:** interface, nxp-usa-inc\
**Created:** [April 22, 2021, 9:17am UTC](https://forum.digikey.com/t/spread-i2c-signal-over-2m-thanks-to-a-pca9615-module/13784 "2021-04-22T09:17:50Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![DaKom](https://avatars.discourse-cdn.com/v4/letter/d/5e9695/32.png) [@DaKom](https://forum.digikey.com/u/DaKom)\
**Post date:** [April 22, 2021, 9:17am UTC](https://forum.digikey.com/t/spread-i2c-signal-over-2m-thanks-to-a-pca9615-module/13784/1 "2021-04-22T09:17:50Z")

</div>

Hello,

I would like to convey an I²C signal resulting from a distance sensor to a PC which has I²C pins over 2 meters. I read about the PCA9615 on this site :  
[Taking The Leap Off Board: An Introduction To I2C Over Long Wires | Hackaday](https://hackaday.com/2017/02/08/taking-the-leap-off-board-an-introduction-to-i2c-over-long-wires/)  
Apparently it’s a differential bus buffer, I didn’t understand quite the differential aspect yet but I’m more interested in the feasibility first. I’m not sure I understood because the datasheet is talking about codes. Anyway I did a scheme of how I think I should use it.

 ![Liaison longue I2C](https://global.discourse-cdn.com/digikey/original/3X/b/c/bc50650e62188015344f7b98f8620f10d434bec5.jpeg)

I’m assuming it’s only in the second case where I connect directly the RJ45 cable to my PC that I will need specific codes, am I right ?

---

<div class="post-metadata">

**Author:** ![sikwal](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/sikwal/32/53670_2.png) [@sikwal](https://forum.digikey.com/u/sikwal)\
**Post date:** [January 11, 2025, 9:38pm UTC](https://forum.digikey.com/t/spread-i2c-signal-over-2m-thanks-to-a-pca9615-module/13784/2 "2025-01-11T21:38:35Z")

</div>

Hi, you did not mention the programming code. My best regards to you.

???

---

<div class="post-metadata">

**Author:** ![anthony\_14117](https://avatars.discourse-cdn.com/v4/letter/a/6a8cbe/32.png) [@anthony\_14117](https://forum.digikey.com/u/anthony_14117)\
**Post date:** [January 13, 2025, 1:21pm UTC](https://forum.digikey.com/t/spread-i2c-signal-over-2m-thanks-to-a-pca9615-module/13784/3 "2025-01-13T13:21:51Z")

</div>

Hello @sikwal

MikroElektronika’s website has a guild on how to use the [MIKROE-4419](https://www.digikey.com/en/products/detail/mikroelektronika/MIKROE-4419/13572760) and the software used to control it  
[I2C Extend 2 Click](https://www.mikroe.com/i2c-extend-2-click)

---

<div class="post-metadata">

**Author:** ![sikwal](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/sikwal/32/53670_2.png) [@sikwal](https://forum.digikey.com/u/sikwal)\
**Post date:** [January 13, 2025, 2:41pm UTC](https://forum.digikey.com/t/spread-i2c-signal-over-2m-thanks-to-a-pca9615-module/13784/4 "2025-01-13T14:41:22Z")

</div>

Thank you very much

???