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PCA9555APW

Low-voltage 16-bit I2C-bus I/O port with interrupt and weak pull-up; I2C-bus to parallel port expander\nOperating power supply voltage range of 1.65 V to 5.5 V\nLow standby current consumption:1.5 μA (typical at 5 V VDD)\n1.0 μA (typical at 3.3 V VDD)\nSchmitt-trigger action allows slow input transition and better switching noise immunityat the SCL and SDA inputs:Vhys = 0.10 x VDD (typical)\n5 V tolerant I/Os\nOpen-drain active LOW interrupt output (INT)\n400 kHz Fast-mode I2C-bus\nInternal power-on reset\nPower-up with all channels configured as inputs with weak pull-up resistors\nNo glitch on power-up\nLatched outputs with 25 mA drive maximum capability for directly driving LEDs\nLatch-up performance exceeds 100 mA per JESD78, Class II\nESD protection exceeds JESD22:2000 V Human Body Model (A114-A)\n1000 V Charged-Device Model (C101)\nPackages offered: TSSOP24, HWQFN24\n;

The PCA9555A is a low-voltage 16-bit General Purpose Input/Output (GPIO) expanderwith interrupt and weak pull-up resistors for I2C-bus/SMBus applications. NXP I/Oexpanders provide a simple solution when additional I/Os are needed while keepinginterconnections to a minimum, for example, in ACPI power switches, sensors, pushbuttons, LEDs, fan control, etc.\nIn addition to providing a flexible set of GPIOs, the wide VDD range of 1.65 V to 5.5 Vallows the PCA9555A to interface with next-generation microprocessors andmicrocontrollers where supply levels are dropping down to conserve power.\nThe PCA9555A contains the PCA9555 register set of four pairs of 8-bit Configuration,Input, Output, and Polarity Inversion registers.\nThe PCA9555A is a pin-to-pin replacement to the PCA9555 and other industry-standarddevices. A more fully featured device, the PCAL9555A, is available with Agile I/Ofeatures. See the respective data sheet for more details.\nThe PCA9555A open-drain interrupt (INT) output is activated when any input state differsfrom its corresponding Input Port register state and is used to indicate to the systemmaster that an input state has changed.\nINT can be connected to the interrupt input of a microcontroller. By sending an interruptsignal on this line, the remote I/O can inform the microcontroller if there is incoming dataon its ports without having to communicate via the I2C-bus. Thus, the PCA9555A canremain a simple slave device.\nThe device outputs have 25 mA sink capabilities for directly driving LEDs while consuminglow device current.\nThe power-on reset sets the registers to their default values and initializes the device statemachine.\nAll input/output pins have weak pull-up resistors connected to them to eliminate externalcomponents.\nThree hardware pins (A0, A1, A2) select the fixed I2C-bus address and allow up to eightdevices to share the same I2C-bus/SMBus.\n

PCA9555BS

16-bitI2CandSMBusI/Oportwithinterrupt

DESCRIPTION ThePCA9555isa24-pinCMOSdevicethatprovide16bitsofGeneralPurposeparallelInput/Output(GPIO)expansionforI2C/SMBusapplicationsandwasdevelopedtoenhancethePhilipsfamilyofICI/Oexpanders.Theimprovementsincludehigherdrivecapability,5VI/Otolerance,low

PCA9555D

16-bitI2CandSMBusI/Oportwithinterrupt

DESCRIPTION ThePCA9555isa24-pinCMOSdevicethatprovide16bitsofGeneralPurposeparallelInput/Output(GPIO)expansionforI2C/SMBusapplicationsandwasdevelopedtoenhancethePhilipsfamilyofICI/Oexpanders.Theimprovementsincludehigherdrivecapability,5VI/Otolerance,low

PCA9555DB

REMOTE16-BITI2CANDSMBusI/OEXPANDERWITHINTERRUPTOUTPUTANDCONFIGURATIONREGISTERS

PCA9555DB

16-bitI2CandSMBusI/Oportwithinterrupt

DESCRIPTION ThePCA9555isa24-pinCMOSdevicethatprovide16bitsofGeneralPurposeparallelInput/Output(GPIO)expansionforI2C/SMBusapplicationsandwasdevelopedtoenhancethePhilipsfamilyofICI/Oexpanders.Theimprovementsincludehigherdrivecapability,5VI/Otolerance,low

PCA9555DB

REMOTE16-BITI2CANDSMBusI/OEXPANDERWITHINTERRUPTOUTPUTANDCONFIGURATIONREGISTERS

PCA9555DB

REMOTE16-BITI2CANDSMBusI/OEXPANDERWITHINTERRUPTOUTPUTANDCONFIGURATIONREGISTERS

PCA9555DB

SMBusI/OExpanderWithInterruptOutput

PCA9555DBQ

SMBusI/OExpanderWithInterruptOutput

PCA9555DBQR

REMOTE16-BITI2CANDSMBusI/OEXPANDERWITHINTERRUPTOUTPUTANDCONFIGURATIONREGISTERS