PCA9554CPW

Low-voltage 8-bit I2C-bus and SMBus low power I/O port with interrupt, weak pull-up

Generaldescription ThePCA9554BandPCA9554Carelow-voltage8-bitGeneralPurposeInput/Output(GPIO)expanderswithinterruptforI2C-bus/SMBusapplications.TheonlydifferencebetweenthePCA9554BandPCA9554CistheirI2CfixedaddressallowingalargernumberofthesamedeviceontheI2C-

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PCA9554CPW

Low-voltage 8-bit I2C-bus and SMBus low power I/O port with interrupt, weak pull-up; I² C-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 I² C-bus\nInput/output configuration register\nPolarity inversion register\nInternal power-on reset\nPower-up with all channels configured as inputs\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: TSSOP16 and HVQFN16\n;

The PCA9554B and PCA9554C are low-voltage 8-bit General Purpose Input/Output(GPIO) expanders with interrupt for I²C-bus/SMBus applications. The only differencebetween the PCA9554B and PCA9554C is their I²C fixed address allowing a largernumber of the same device on the I²C-bus with no chance of address conflict. 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,push buttons, LEDs, fan control, etc.\nIn addition to providing a flexible set of GPIOs, the wide VDD range of 1.65 V to 5.5 V allowthe PCA9554B/PCA9554C to interface with next-generation microprocessors andmicrocontrollers where supply levels are dropping down to conserve power.\nThe PCA9554B/PCA9554C contain a register set of 8-bit Configuration, Input, Output,and Polarity Inversion registers.\nThe PCA9554B is a pin-to-pin replacement for the PCA9554, while the PCA9554Creplaces the PCA9554A. Both of these devices replace other industry-standard partnumbers. More fully-featured parts PCAL9554B and PCAL9554C are also available withAgile I/O features. See the respective data sheet for more details.\nThe PCA9554B/PCA9554C open-drain interrupt (INT) output is activated when any inputstate differs from its corresponding Input Port register state and is used to indicate to thesystem master 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, thePCA9554B/PCA9554C can remain 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. The PCA9554B and PCA9554C differ only intheir base I²C-bus addresses permitting a total of 16 devices on the I²C-bus, minimizingthe chance for address conflict, even in the most complex system.\n

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PCA9554D

8-bitI2C-busandSMBusI/Oportwithinterrupt

Generaldescription ThePCA9554andPCA9554Aare16-pinCMOSdevicesthatprovide8bitsofGeneralPurposeparallelInput/Output(GPIO)expansionforI2C-bus/SMBusapplicationsandweredevelopedtoenhancetheNXPSemiconductorsfamilyofI2C-busI/Oexpanders.Theimprovementsincludehigherd

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PCA9554D

8-bitI2CandSMBusI/Oportwithinterrupt

DESCRIPTION ThePCA9554andPCA9554Aare16-pinCMOSdevicesthatprovide8bitsofGeneralPurposeparallelInput/Output(GPIO)expansionforI2C/SMBusapplicationsandweredevelopedtoenhancethePhilipsfamilyofICI/Oexpanders.Theimprovementsincludehigherdrivecapability,5VI/Ot

PHI

PCA9554D

8-bitI2C-busandSMBusI/Oportwithinterrupt

Generaldescription ThePCA9554andPCA9554Aare16-pinCMOSdevicesthatprovide8bitsofGeneralPurposeparallelInput/Output(GPIO)expansionforI2C-bus/SMBusapplicationsandweredevelopedtoenhancetheNXPSemiconductorsfamilyofI2C-busI/Oexpanders.Theimprovementsincludehigherd

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PCA9554DB

8-bitI2C-busandSMBusI/Oportwithinterrupt

Generaldescription ThePCA9554andPCA9554Aare16-pinCMOSdevicesthatprovide8bitsofGeneralPurposeparallelInput/Output(GPIO)expansionforI2C-bus/SMBusapplicationsandweredevelopedtoenhancetheNXPSemiconductorsfamilyofI2C-busI/Oexpanders.Theimprovementsincludehigherd

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PCA9554DB

8-bitI2CandSMBusI/Oportwithinterrupt

DESCRIPTION ThePCA9554andPCA9554Aare16-pinCMOSdevicesthatprovide8bitsofGeneralPurposeparallelInput/Output(GPIO)expansionforI2C/SMBusapplicationsandweredevelopedtoenhancethePhilipsfamilyofICI/Oexpanders.Theimprovementsincludehigherdrivecapability,5VI/Ot

PHI

PCA9554DB

8-bitI2C-busandSMBusI/Oportwithinterrupt

Generaldescription ThePCA9554andPCA9554Aare16-pinCMOSdevicesthatprovide8bitsofGeneralPurposeparallelInput/Output(GPIO)expansionforI2C-bus/SMBusapplicationsandweredevelopedtoenhancetheNXPSemiconductorsfamilyofI2C-busI/Oexpanders.Theimprovementsincludehigherd

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PCA9554DB

SMBusI/OExpanderWithInterruptOutput

PCA9554DB

REMOTE8-BITI2CANDSMBusI/OEXPANDERWITHINTERRUPTOUTPUTANDCONFIGURATIONREGISTERS