PCA9546ABS

4-channel I2C switch with reset

Generaldescription ThePCA9546Aisaquadbi-directionaltranslatingswitchcontrolledviatheI2C-bus.TheSCL/SDAupstreampairfansouttofourdownstreampairs,orchannels.AnyindividualSCx/SDxchannelorcombinationofchannelscanbeselected,determinedbythecontentsoftheprogramma

PCA9546ABS

4-channel I2C-bus switch with reset; 1-of-4 bidirectional translating switches\nI2C-bus interface logic; compatible with SMBus standards\nActive LOW reset input\n3 address pins allowing up to 8 devices on the I2C-bus\nChannel selection via I2C-bus, in any combination\nPower-up with all switch channels deselected\nLow Ron switches\nAllows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses\nNo glitch on power-up\nSupports hot insertion\nLow standby current\nOperating power supply voltage range of 2.3 V to 5.5 V\n5 V tolerant Inputs\n0 Hz to 400 kHz clock frequency\nESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM perJESD22-C101\nLatch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA\nThree packages offered: SO16, TSSOP16, and HVQFN16\n;

The PCA9546A is a quad bidirectional translating switch controlled via 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.\nAn active LOW reset input allows the PCA9546A 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 (POR) function.\nThe pass gates of the switches are constructed such that the VDD pin can be used to limit the maximum high voltage which is 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.\n

PCA9546AD

4-CHANNELI2CANDSMBusSWITCHWITHRESETFUNCTION

PCA9546AD

4-CHANNELI2CANDSMBusSWITCHWITHRESETFUNCTION

PCA9546AD

4-CHANNELI2CANDSMBusSWITCHWITHRESETFUNCTION

PCA9546AD

4-CHANNELI2CANDSMBusSWITCHWITHRESETFUNCTION

PCA9546AD

4-channelI2Cswitchwithreset

Generaldescription ThePCA9546Aisaquadbi-directionaltranslatingswitchcontrolledviatheI2C-bus.TheSCL/SDAupstreampairfansouttofourdownstreampairs,orchannels.AnyindividualSCx/SDxchannelorcombinationofchannelscanbeselected,determinedbythecontentsoftheprogramma

PCA9546ADGVR

4-CHANNELI2CANDSMBusSWITCHWITHRESETFUNCTION

PCA9546ADGVR

4-CHANNELI2CANDSMBusSWITCHWITHRESETFUNCTION

PCA9546ADGVR

4-CHANNELI2CANDSMBusSWITCHWITHRESETFUNCTION