TCA9539 has the maximum input rise time of 300ns.
Can TCA9539 connect to the standard mode device which has the maximum output rise time of 1000ns?
Best regards,
Daisuke
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Daisuke-san,
Edit:
The TCA9539 DOES support standard-mode I2C with maximum rise time of 1000ns, which is per the I2C spec
The TCA9539 does support fast-mode I2C with a maximum rise time of up to 300ns (per the I2C spec).
Unfortunately, for fast-mode, we cannot recommend this, due to the way the TCA device reads the input on rising edges. If the rising edge is not fast enough, there is the possibility that the data will not be read.
One way you might be able to get around this is to lower the pull up resistance. You would need to make sure that you do not violate the maximum input current of the TCA9539.
Hi Jonathan-san,
Thank you for your reply.
I understand that the I2C interface on TCA9539 supports only the fast mode, does not support the standard mode.
Best regards,
Daisuke
Daisuke-san,
I mis-understood your post, my appologies.
The TCA9539 DOES support standard-mode I2C with maximum rise time of 1000ns.
The TCA9539 does NOT support fast-mode I2C with a maximum rise time of 1000ns (per the I2C spec)
This is an error in our datasheet, that has been noted and will be corrected.
I've updated my original post to reflect this