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NXP Semiconductors PCA9535PW I²C Bus & SMBus I/O Port

NXP Semiconductors PCA9535PW I²C bus and SMBus is a low power I/O port with a 24-pin CMOS device. This provides 16 bits of GPIO expansion for I²C bus / SMBus applications and was developed to enhance I²C bus I/O expanders. The PCA9535PW features NXP PCA9535PW I/O port device include higher drive capability, 5V I/O tolerance, lower supply current, individual I/O configuration, and smaller packaging. The PCA9535PW provides a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, and more.

Features

  • 2.3V to 5.5V operating power supply voltage
  • 5V tolerant I/Os
  • Polarity inversion register
  • Active LOW interrupt output
  • Low standby current
  • Noise filter on SCL/SDA inputs
  • No glitch on power-up
  • Internal power-on reset
  • 16 I/O pins which default to 16 inputs
  • 0Hz to 400kHz clock frequency
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100mA
  • Offered in four different packages: SO24, TSSOP24, HVQFN24, and HWQFN24

PCA9535 Block Diagram

Block Diagram - NXP Semiconductors PCA9535PW I²C Bus & SMBus I/O Port
Published: 2010-03-10 | Updated: 2025-04-29