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Hello,
we are looking for an I²C-Switch which can also do the level shifting for us. In the datasheet is mentioned, that the TCA9543A can shift the level from 3,3V master bus to a lower voltage slave bus (for example 1,8V). After study of the datasheet of the TCA9543A we are not sure if the slave i²c-bus could be 5V, while the master i²c-bus will runs at 3,3V level.
The TCA9543 will have a supply voltage (Vcc) of 3,3V and the pull-up-resistors at the i²c-bus will pull-up against 3,3V-Vcc at the master side and against 5V-Vcc at the slave-side. Each slave-side of the TCA9543 is connected to a P82B715 as an i²c-bus extender.
Does such a desgin will works ?
Thank you very much.
Best regards,
Oliver Brunenberg
