PCA9575PW2

16-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt

Generaldescription ThePCA9575isaCMOSdevicethatprovides16bitsofGeneralPurposeparallelInput/Output(GPIO)expansioninlowvoltageprocessorandhandheldbatterypoweredmobileapplicationsandwasdevelopedtoenhancetheNXPfamilyofI2C-busI/Oexpanders.Theimprovementsinclu

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PCA9575PW2

絲印：PA9575PW2；Package：TSSOP28；16-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt

1Generaldescription ThePCA9575isaCMOSdevicethatprovides16bitsofGeneralPurposeparallelInput/Output(GPIO) expansioninlowvoltageprocessorandhandheldbatterypoweredmobileapplicationsandwasdevelopedtoenhancetheNXPfamilyofI2C-busI/Oexpanders.Theimprovementsincl

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PCA9575PW2

16-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt; Separate supply rails for core logic and each of the two I/O banks provides voltage level shifting\n1.1 V to 3.6 V operation with level shifting feature\nVery low standby current: < 2 μA\n16 configurable I/O pins organized as 2 banks that default to inputs at power-up\nOutputs: Totem pole: 1 mA source and 3 mA sink\nIndependently programmable 100 kΩ pull-up or pull-down for each I/O pin\nOpen-drain active LOW interrupt (INT) output pin allows monitoring of logic level change of pins programmed as inputs\nInputs: Programmable bus hold provides valid logic level when inputs are not actively driven\nProgrammable Interrupt Mask Control for input pins that do not require an interrupt when their states change or to prevent spurious interrupts default to mask at power-up\nPolarity Inversion register allows inversion of the polarity of the I/O pins when read\n400 kHz I2C-bus serial interface\nCompliant with I2C-bus Standard-mode (100 kHz)\nActive LOW reset (RESET) input pin resets device to power-up default state\nGPIO All Call address allows programming of more than one device at the same time with the same parameters\n16 programmable slave addresses using 4 address pins (28-pin TSSOP only)\n-40 C to +85 C operation\nESD protection exceeds 6000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101\nLatch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA\nPackages offered: TSSOP28, TSSOP24, HWQFN24\n;

The PCA9575 is a CMOS device that provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion in low voltage processor and handheld battery powered mobile applications and was developed to enhance the NXP family of I2C-bus I/O expanders. The improvements include lower supply current, lower operating voltage of 1.1 V to 3.6 V, separate supply rails to allow voltage level translation anywhere between 1.1 V and 3.6 V, 400 kHz clock frequency, and smaller packaging. Any of the 16 I/O ports can be configured as an input or output independent of each other and default on start-up to inputs.\nI/O expanders provide a simple solution when additional I/Os are needed while keeping interconnections to a minimum; for example in battery powered mobile applications and clamshell devices for interfacing to sensors, push buttons, keypad, etc. In addition to providing a flexible set of GPIOs, it simplifies interconnection of a processor running at one voltage level to I/O devices operating at a different (usually higher) voltage level. PCA9575 has built-in level shifting feature that makes these devices extremely flexible in mixed signal environments where communication between incompatible I/Os is required. The core of PCA9575 can operate at a voltage as low as 1.1 V while each I/O bank can operate in the range 1.1 V to 3.6 V. Bus hold with programmable on-chip pull-up or pull-down feature for I/Os is also provided.\nThe output stage consists of two banks each of 8-bit configuration registers, input registers, interrupt mask registers, output registers, bus-hold and pull-up/pull-down registers and polarity inversion registers. These registers allow the system master to program and configure 16 GPIOs through the I2C-bus.\nThe system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration register bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the read registers can be inverted with the Polarity Inversion register (active HIGH or active LOW operation). Either a bus-hold function or pull-up/pull-down feature can be selected by programming corresponding registers. The bus-hold provides a valid logic level when the I/O bus is not actively driven. When bus-hold feature is not selected, the I/O ports can be configured to have pull-up or pull-down by programming the pull-up/pull-down configuration register.\nAn open-drain interrupt output pin (INT) allows monitoring of the input pins and is asserted each time a change occurs on an input port unless that port is masked (default = masked). A 'GPIO All Call' command allows programming multiple PCA9575s at the same time even if they have different individual I2C-bus addresses. This allows optimal code programming when more than one device needs to be programmed with the same instruction or if all outputs need to be turned on or off at the same time. The internal Power-On Reset (POR) or hardware reset pin (RESET) initializes the two banks of 8 I/Os as inputs, sets the registers to their default values and initializes the device state machine. The I/O banks are held in its default state when the logic supply (VDD) is off.\nThe PCA9575 is available in 24-pin TSSOP, 28-pin TSSOP and HWQFN24 packages, and is specified over the -40 C to +85 C industrial temperature range.\nThe 28-pin package provides four address select pins, allowing up to 16 PCA9575 devices to be connected with 16 different addresses on the same I2C-bus.\n

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PCA9575PW2118

16-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt

1Generaldescription ThePCA9575isaCMOSdevicethatprovides16bitsofGeneralPurposeparallelInput/Output(GPIO) expansioninlowvoltageprocessorandhandheldbatterypoweredmobileapplicationsandwasdevelopedtoenhancetheNXPfamilyofI2C-busI/Oexpanders.Theimprovementsincl

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