PCA9546 4-channel I2C Switch With Reset

The PCA9546 is a quad bi-directional translating Switch controlled by the I2C-bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels CAN be selected, determined by the contents of the programmable Control Register An active-LOW reset input allows the PCA9546 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 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 PCA9546. This allows the use of different bus voltages on each 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.
By NXP Semiconductors
Part Manufacturer Description Datasheet Samples
PCA9546ADRG4 Texas Instruments 9546 SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
PCA9546APWE4 Texas Instruments 4-Channel I2C And SMBus Switch With Reset Functions 16-TSSOP -40 to 85
PCA9546ARGYR Texas Instruments 4-Channel I2C And SMBus Switch With Reset Functions 16-VQFN -40 to 85
PCA9546ADT Texas Instruments 4-Channel I2C And SMBus Switch With Reset Functions 16-SOIC -40 to 85
PCA9546APWG4 Texas Instruments 4-Channel I2C And SMBus Switch With Reset Functions 16-TSSOP -40 to 85
PCA9546ARGYRG4 Texas Instruments 4-Channel I2C And SMBus Multiplexer With Reset Functions 16-VQFN -40 to 85
PCA9546ADR Texas Instruments 4-Channel I2C And SMBus Switch With Reset Functions 16-SOIC -40 to 85
PCA9546APW Texas Instruments 4-Channel I2C And SMBus Switch With Reset Functions 16-TSSOP -40 to 85
PCA9546ARGVRG4 Texas Instruments 4-Channel I2C And SMBus Switch With Reset Functions 16-VQFN -40 to 85
PCA9546ADTG4 Texas Instruments 4-Channel I2C And SMBus Multiplexer With Reset Functions 16-SOIC -40 to 85
PCA9546 's PackagesPCA9546 's pdf datasheet



PCA9546 Pinout, Pinouts
PCA9546 pinout,Pin out
This is one package pinout of PCA9546,If you need more pinouts please download PCA9546's pdf datasheet.

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