Part Number: TXS0102
In my design, a CPU at 3.3V logic connects to TXS0102DCUR level translator and a peripheral at 1.8V logic. This is a working design by a third party evaluation board so I would like to retain it. The interface can either be I2C or MDC/MDIO and configurable.
I also have an ARM processor connecting to TCA9546APWR and I want to connect one of the MUX outputs to the same peripheral above. And the interface is going to be strapped to I2C. When the TXS0102DCUR is enabled the ARM won't access the device but the CPU will. When the ARM wants to access the device, TXS0102DCUR will be turned off. Do you see a problem?
Or do I need to insert a device such as TCA9517ADGKR between the bus switch and the device in order to turn it off?
Are the TXS0102 and TCA9546A connected to each other at the 1.8 V side?
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In reply to Clemens Ladisch:
That is correct.
In reply to Ramgopal Divakar:
When the TXS is disabled, or when one of the channels of the TCA9546A is disabled, then the corresponding I/O pins are high impedance. So you do not need an additional device to disconnect the buses.
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