PCA9542AD

2-channel I2C-bus multiplexer and interrupt logic

Generaldescription ThePCA9542Aisa1-of-2bidirectionaltranslatingmultiplexer,controlledviatheI2C-bus.TheSCL/SDAupstreampairfansouttotwoSCx/SDxdownstreampairs,orchannels.OnlyoneSCx/SDxchannelisselectedatatime,determinedbythecontentsoftheprogrammablecontrol

ETC

PCA9542AD

2-channel I2C-bus multiplexer and interrupt logic; 1-of-2 bidirectional translating multiplexer\nI²C-bus interface logic; compatible with SMBus\n2 active LOW interrupt inputs (INT0, INT1)\nActive LOW interrupt output (INT)\n3 address pins allowing up to 8 devices on the I²C-bus\nChannel selection via I²C-bus\nPowers up with all multiplexer 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\nPackages offered: SO14, TSSOP14\n;

The PCA9542A is a 1-of-2 bidirectional translating multiplexer, controlled via the I²C-bus. The SCL/SDA upstream pair fans out to two SCx/SDx downstream pairs, or channels. Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register. Two interrupt inputs, INT0 and INT1, one for each of the SCx/SDx downstream pairs, are provided. One interrupt output, INT, which acts as an AND of the two interrupt inputs, is provided.\nA power-on reset function puts the registers in their default state and initializes the I²C-bus state machine with no channels selected.\nThe pass gates of the multiplexer are constructed such that the VDD pin can be used to limit the maximum high voltage which will be passed by the PCA9542A. This allows the use of different bus voltages on each SCx/SDx 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

PCA9542APW

2-channelI2C-busmultiplexerandinterruptlogic

Generaldescription ThePCA9542Aisa1-of-2bidirectionaltranslatingmultiplexer,controlledviatheI2C-bus.TheSCL/SDAupstreampairfansouttotwoSCx/SDxdownstreampairs,orchannels.OnlyoneSCx/SDxchannelisselectedatatime,determinedbythecontentsoftheprogrammablecontrol

ETC

PCA9542PW

2-channelI2Cmultiplexerandinterruptcontroller

DESCRIPTION ThePCA9542isa1-of-2bi-directionaltranslatingmultiplexer,controlledviatheI2Cbus.TheSCL/SDAupstreampairfansouttotwoSCx/SDxdownstreampairs,orchannels.OnlyoneSCx/SDxchannelisselectedatatime,determinedbythecontentsoftheprogrammablecontrolregister.

PHI

PCA9542PWDH

2-channelI2Cmultiplexerandinterruptcontroller

DESCRIPTION ThePCA9542isa1-of-2bi-directionaltranslatingmultiplexer,controlledviatheI2Cbus.TheSCL/SDAupstreampairfansouttotwoSCx/SDxdownstreampairs,orchannels.OnlyoneSCx/SDxchannelisselectedatatime,determinedbythecontentsoftheprogrammablecontrolregister.

PHI

PE9542

TNCMaletoMCXJackAdapter