PCA9306: Is there a lower boundary for SCL

Tim Eickelberg

Part Number: PCA9306

Tool/software:

Hello.

May it be possible to use this device for lower frequencies than 50 kHz at SCL? In the datasheet are only 100 kHz and 400 kHz mentioned. Figure 9-3 starts at 50 kHz.

Thanks and best regards

Tim

4 months ago

0 Clemens Ladisch 4 months ago

Guru 317000 points

This devices does not have a lower frequency limit; it supports DC signals.

+1 Tyler Townsend 4 months ago

TI__Mastermind 47828 points

Hi Tim,

I agree with Clemens here.

Also, the I2C allows for a range of data rates up to 100kHz or up to 400kHz. You technically can run I2C as 100's of Hz if you wanted to.

50kHz should be fine. I have ran I2C across level translators like this at 10k.

REgards,

Tyler

0 Tim Eickelberg 4 months ago

Prodigy 40 points

Thanks for your your assessment Clemens and Tyler. Just wanted to confirm that I didn't overlook something.

Best regards

Tim

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PCA9306: Is there a lower boundary for SCL