PCA9546A 4-channel I2C-bus Switch With Interrupt Logic And Reset

The PCA9546A is a quad bidirectional translating Switch controlled via the I 2C-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 PCA9546A to recover from a situation where one of the downstream I 2C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I 2C-bus state machine and causes all the channels to be deselected as does the internal Power-On Reset (POR) 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 PCA9546A. This allows the use of different bus voltages on each pair, so that 1.8 V or 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
PCA9546ADGVR Texas Instruments 4-Channel I2C And SMBus Multiplexer With Reset Functions 16-TVSOP -40 to 85
PCA9546ADGVRG4 Texas Instruments 4-Channel I2C And SMBus Multiplexer With Reset Functions 16-TVSOP -40 to 85
PCA9546ADG4 Texas Instruments 4-Channel I2C And SMBus Multiplexer With Reset Functions 16-SOIC -40 to 85
PCA9546ADTG4 Texas Instruments 4-Channel I2C And SMBus Multiplexer With Reset Functions 16-SOIC -40 to 85
PCA9546AGQNR Texas Instruments IC 9546 SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PBGA20, PLASTIC, MICRO, BGA-20, Multiplexer/Demultiplexer
PCA9546ADR Texas Instruments 4-Channel I2C And SMBus Multiplexer With Reset Functions 16-SOIC -40 to 85
PCA9546AD Texas Instruments 4-Channel I2C And SMBus Multiplexer With Reset Functions 16-SOIC -40 to 85
PCA9546ADWT Texas Instruments IC 9546 SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16, PLASTIC, SOIC-16, Multiplexer/Demultiplexer
PCA9546ADGVT Texas Instruments IC 9546 SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO20, PLASTIC, TVSOP-20, Multiplexer/Demultiplexer
PCA9546AZQNR Texas Instruments IC 9546 SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PBGA20, PLASTIC, MICRO, BGA-20, Multiplexer/Demultiplexer
PCA9546A 's PackagesPCA9546A 's pdf datasheet
PCA9546ABS HVQFN
PCA9546AD SO
PCA9546APW TSSOP

PCA9546A pdf datasheet download


PCA9546A Pinout, Pinouts
PCA9546A pinout,Pin out
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