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Integrated Circuits PCA9535 Integrated Circuits PCA9535PW I/O Expanders

Country/Region china
Company Asco Electronic Group Co. Limited
Categories Electronic Integrated Circuits
Telephone +86-755-89678886
ICP License Issued by the Chinese Ministry
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    Integrated Circuits PCA9535 Integrated Circuits PCA9535PW I/O Expanders

    PCA9535 Integrated Circuits PCA9535PW I/O Expanders

    Freescale /NXP PCA9535PW Integrated Circuits Interface - I/O Expanders I2C/SMBUS 16BIT GPIO I/O Expander 16 IC, SMBus 400kHz 24-TSSOP

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    PCA9535PW

    Product details

    PCA9535PW Integrated Circuits

    Interface - I/O Expanders I2C/SMBUS 16BIT GPIO

    I/O Expander 16 IC, SMBus 400kHz 24-TSSOP

    All integrated circuit and electronic component from the largest independent distributor of China

    Contact personApple Lin

    Skypemikehkasco

    QQ2781963952

    E-mailmike at hkasco.com

    Cell Phone15876852151

    Tel Phone+86-755-89678886

    Product Description

    General Description

    The PCA9535 and PCA9535C are 24-pin CMOS devices that provide 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the Semiconductors family of I2C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc. The PCA9535 and PCA9535C consist of two 8-bit Configuration (Input or Output selection), Input, Output and Polarity Inversion (active HIGH or active LOW operation) registers. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the read register can be inverted with the Polarity Inversion register. All registers can be read by the system master. Although pin-to-pin and I 2C-bus address compatible with the PCF8575, software changes are required due to the enhancements and are discussed in Application Note AN469. The PCA9535 is identical to the PCA9555 except for the removal of the internal I/O pull-up resistor which greatly reduces power consumption when the I/Os are held LOW. The PCA9535C is identical to the PCA9535 except that all the I/O pins are high-impedance open-drain outputs. The PCA9535 and PCA9535C open-drain interrupt output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed. The power-on reset sets the registers to their default values and initializes the device state machine. Three hardware pins (A0, A1, A2) vary the fixed I2C-bus address and allow up to eight devices to share the same I2C-bus/SMBus. The fixed I2C-bus address of the PCA9535 and PCA9535C are the same as the PCA9555 allowing up to eight of these devices in any combination to share the same I2C-bus/SMBus.

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