Jose Alberto Reyes Morales

Re: PCA9617 I2C signals getting damaged during Hot swapping/Insertion

Discussion created by Jose Alberto Reyes Morales Employee on Nov 22, 2019
Latest reply on Nov 29, 2019 by Jose Alberto Reyes Morales
Branched from an earlier discussion

For hot-swapping operations, you need a device with circuitry that precharges the SDA and SCL pins to prevent glitching data on an active I2C bus when the unpowered slave card is inserted into the backplane system. Unfortunately, the PCA9617 does not include this feature, I recommend you to switch to a hot-swappable translator like the PCA9511/12/13/14 Hot Swappable I2C Buffers:
PCA9511A: https://www.nxp.com/docs/en/data-sheet/PCA9511A.pdf

PCA9512: https://www.nxp.com/docs/en/data-sheet/PCA9512A_PCA9512B.pdf

PCA9513/14: https://www.nxp.com/docs/en/data-sheet/PCA9513A_PCA9514A.pdf

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