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XRA1203 - 16-BIT I2C/SMBUS GPIO EXPANDER

General Description

The XRA1203 is a 16-bit GPIO expander with an I2C/ SMBus interface.

After power-up, the XRA1203 has internal 100K ohm pull-up resistors on each I/O pin that can be individually enabled.

In addition, the GPIOs on the XRA1203 can individually be controlled and configured.

Key Features

  • 1.65V to 3.6V operating voltage.
  • 16 General Purpose I/Os (GPIOs).
  • 5V tolerant inputs.
  • Maximum stand-by current of 1uA at +1.8V.
  • I2C/SMBus bus interface.
  • I2C clock frequency up to 400kHz.
  • Noise filter on SDA and SCL inputs.
  • Up to 16 I2C Slave Addresses.
  • Individually programmable inputs.
  • Internal pull-up resistors.
  • Polarity inversion.
  • Individual interrupt enable.
  • Rising edge and/or Falling edge interrupt.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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XRA1203 16-BIT I2C/SMBUS GPIO EXPANDER WITH RESET SEPTEMBER 2011 REV. 1.0.0 GENERAL DESCRIPTION The XRA1203 is a 16-bit GPIO expander with an I2C/ SMBus interface. After power-up, the XRA1203 has internal 100K ohm pull-up resistors on each I/O pin that can be individually enabled. In addition, the GPIOs on the XRA1203 can individually be controlled and configured. As outputs, the GPIOs can be outputs that are high, low or in three-state mode. The three-state mode feature is useful for applications where the power is removed from the remote devices, but they may still be connected to the GPIO expander. As inputs, the internal pull-up resistors can be enabled or disabled and the input polarity can be inverted. The interrupt can be programmed for different behaviors.