PCA9849

4-channel ultra-low voltage, Fm I2C-bus multiplexer with reset

1Generaldescription ThePCA9849isanultra-lowvoltage,quadbidirectionaltranslatingmultiplexercontrolledviatheI2C-bus.TheSCL/SDAupstreampairfansouttofourdownstreampairs,orchannels.AsingleSCx/SDxchannelcanbeselected,determinedbytheprogrammablecontrolregister.Th

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PCA9849PW

絲印：PCA9849；Package：TSSOP16；4-channel ultra-low voltage, Fm I2C-bus multiplexer with reset

1Generaldescription ThePCA9849isanultra-lowvoltage,quadbidirectionaltranslatingmultiplexercontrolledviatheI2C-bus.TheSCL/SDAupstreampairfansouttofourdownstreampairs,orchannels.AsingleSCx/SDxchannelcanbeselected,determinedbytheprogrammablecontrolregister.Th

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PCA9849PW

4-channel ultra-low voltage, Fm+ I2C-bus multiplexer with reset; Ultra-low voltage operation, down to 0.8 V to interface with next-generationCPUs\n1-of-4 bidirectional translating multiplexer\nFm+ I2C-bus interface logic; compatible with SMBus standards\nActive LOW reset input\n2 address pins allowing up to 16 devices on the I2C-bus\nChannel selection via I2C-bus\nPower-up with all switch channels deselected\nLow Ron switches\nAllows voltage level translation between 0.8 V, 1.8 V, 2.5 V and 3.3 V buses\nReset via I2C-bus software command\nI2C Device ID function\nNo glitch on power-up\nSupports hot insertion since all channels are de-selected at power-on\nLow standby current\n3.6 V tolerant inputs\n0 Hz to 1 MHz clock frequency\nESD protection exceeds 6000 V HBM per JESD22-A114 and 1000 V CDM perJESD22-C101\nLatch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA\nTwo packages offered: TSSOP16 and HVQFN16\n;

The PCA9849 is an ultra-low voltage, quad bidirectional translating multiplexercontrolled via the I2C-bus. The SCL/SDA upstream pair fans out to fourdownstream pairs, or channels. A single SCx/SDx channel can be selected, determined bythe programmable control register. This feature allows multiple devices with the sameI2C-bus address to reside on the same bus. The multiplexer device canalso separate a heavily loaded I2C-bus into separate bus segments,eliminating the need for a bus buffer.\nAn active LOW reset input allows the PCA9849 to recover from a situation where one of thedownstream I2C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C-bus state machineand deselects all the channels, as does the internal Power-On Reset (POR) function.\nThe pass gates of the switches are constructed such that the VDD1 pin is usedto limit the maximum high voltage which is passed by the PCA9849. This allows the use ofdifferent bus voltages on each channel, so that 0.8 V, 1.8 V, 2.5 V or 3.3 V parts cancommunicate without any additional protection. External pull-up resistors pull the busup to the desired voltage level for each channel. All I/O pins are 3.6 V tolerant.\n

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PCA9849PWJ

4-channel ultra-low voltage, Fm I2C-bus multiplexer with reset

1Generaldescription ThePCA9849isanultra-lowvoltage,quadbidirectionaltranslatingmultiplexercontrolledviatheI2C-bus.TheSCL/SDAupstreampairfansouttofourdownstreampairs,orchannels.AsingleSCx/SDxchannelcanbeselected,determinedbytheprogrammablecontrolregister.Th

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PCA9849BS

4-channel ultra-low voltage, Fm I2C-bus multiplexer with reset

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PCA9849PW

4-channel ultra-low voltage, Fm I2C-bus multiplexer with reset

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PCA9849PWJ

4-channel ultra-low voltage, Fm I2C-bus multiplexer with reset

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