PCA9547PW

8-channel I2C-bus multiplexer with reset

Generaldescription ThePCA9547isanoctalbidirectionaltranslatingmultiplexercontrolledbytheI2C-bus. TheSCL/SDAupstreampairfansouttoeightdownstreampairs,orchannels.OnlyoneSCx/SDxchannelcanbeselectedatatime,determinedbythecontentsoftheprogrammablecontrolr

ETC

PCA9547PW

8-channel I2C-bus multiplexer with reset; 1-of-8 bidirectional translating multiplexer\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, one channel at a time\nPower-up with all channels deselected except Channel 0 which is connected\nLow Ron multiplexers\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\nPackages offered: SO24, TSSOP24, HVQFN24\n;

The PCA9547 is an octal bidirectional translating multiplexer controlled by the I2C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Only one SCx/SDx channel can be selected at a time, determined by the contents of the programmable control register. The device powers up with Channel 0 connected, allowing immediate communication between the master and downstream devices on that channel.\nAn active LOW reset input allows the PCA9547 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 causing all the channels to be deselected, except Channel 0 so that the master can regain control of the bus.\nThe pass gates of the multiplexers are constructed such that the VDD pin can be used to limit the maximum high voltage which will be passed by the PCA9547. 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.\n

恩XP

PCA9547PW

8-channel I2C-bus multiplexer with reset

PE9547

QDNMaletoNFemaleAdapter

QPL9547

0.1-6GHzUltraLow-NoiseLNA

SPP9547

P-ChannelEnhancementModeMOSFET