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PCAL9535A Key Features

  • I2C-bus to parallel port expander
  • Operating power supply voltage range of 1.65 V to 5.5 V
  • Low standby current consumption
  • 1.5 A (typical at 5 V VDD)
  • 1.0 A (typical at 3.3 V VDD)
  • Schmitt-trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs
  • Vhys = 0.10  VDD (typical)
  • 5 V tolerant I/Os
  • Open-drain active LOW interrupt output (INT)
  • 400 kHz Fast-mode I2C-bus

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PCAL9535A Description

The PCAL9535A is a low-voltage 16-bit General Purpose Input/Output (GPIO) expander with interrupt and reset for I2C-bus/SMBus applications. NXP I/O expanders provide a simple solution when additional I/Os are needed while keeping interconnections to a minimum, for example, in ACPI power switches, sensors, push buttons, LEDs, fan control, etc. In addition to providing a flexible set of GPIOs, the wide VDD range of...

PCAL9535A Applications

  • I2C-bus to parallel port expander
  • Operating power supply voltage range of 1.65 V to 5.5 V