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XRA1201 - 16-BIT I2C/SMBUS GPIO EXPANDER

General Description

The XRA1201/1201P is a 16-bit GPIO expander with an I2C/SMBus interface.

After power-up, the XRA1201 has internal 100K ohm pull-up resistors on each I/O pin that can be individually enabled.

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 32 I2C Slave Addresses.
  • Individually programmable inputs.
  • Internal pull-up resistors.
  • Polarity inversion.
  • Individual interrupt enable.
  • Rising edge and/or Falling edge interrupt.

📥 Download Datasheet

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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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XRA1201/1201P 16-BIT I2C/SMBUS GPIO EXPANDER SEPTEMBER 2011 REV. 1.0.0 GENERAL DESCRIPTION The XRA1201/1201P is a 16-bit GPIO expander with an I2C/SMBus interface. After power-up, the XRA1201 has internal 100K ohm pull-up resistors on each I/O pin that can be individually enabled. The XRA1201P has the internal pull-up resistors enabled upon power-up in case it is necessary for the inputs to be in a known state. In addition, the GPIOs on the XRA1201/1201P 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.