PCA9543A/PCA9543B/PCA9543C 2-channel I2C-bus Switch With Interrupt Logic And Reset

The PCA9543A PCA9543B/PCA9543C is a bidirectional translating Switch controlled by the I2C-bus. The SCL/SDA upstream pair fans out to two downstream pairs, or channels. Any individual SCx/SDx channels or combination of channels CAN be selected, determined by the contents of the programmable control Register Two interrupt inputs, INT0 and INT1, one for each of the downstream pairs, are provided. One interrupt output, INT, which acts as an AND of the two interrupt inputs, is provided. An active LOW reset input allows the PCA9543X to recover from a situation where one of the downstream I2C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C-bus state machine and causes all the channels to be deselected, as does the internal power-on reset function. The pass Gates of the switches are constructed such that the VDD pin CAN be used to limit the maximum high voltage which will be passed by the PCA9543X. This allows the use of different bus voltages on each SCx/SDx pair, so that 1.8 V, 2.5 V, or 3.3 V parts CAN communicate with 5 V parts without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5 V tolerant. The PCA9543A PCA9543B and PCA9543C are identical except for the fixed portion of the slave address.
By NXP Semiconductors
PCA9543A 's PackagesPCA9543A 's pdf datasheet

PCA9543A pdf datasheet download

PCA9543A Pinout, Pinouts
PCA9543A pinout,Pin out
This is one package pinout of PCA9543A,If you need more pinouts please download PCA9543A's pdf datasheet.

PCA9543A Application circuits
PCA9543A circuits
This is one application circuit of PCA9543A,If you need more circuits,please download PCA9543A's pdf datasheet.

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