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XRA1405 - 16-BIT SPI GPIO EXPANDER

Description

The XRA1405 is an 16-bit GPIO expander with an SPI interface.

After power-up, the XRA1405 has internal 100K ohm pull-up resistors on each I/O pin that can be individually enabled.

In addition, the GPIOs on the XRA1405 can individually be controlled and configured.

Features

  • 1.65V to 3.6V operating voltage.
  • 16 General Purpose I/Os (GPIOs).
  • Integrated Level Shifters.
  • 5V tolerant inputs.
  • Maximum stand-by current of 1uA at +1.8V.
  • SPI bus interface.
  • SPI Clock Frequency up to 26MHz.
  • Individually programmable inputs.
  • Internal pull-up resistors.
  • Polarity inversion.
  • Individual interrupt enable.
  • Rising edge and/or Falling edge interrupt.
  • Input filter.
  • Individually programma.

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Datasheet preview – XRA1405

Datasheet Details

Part number XRA1405
Manufacturer Exar
File Size 215.86 KB
Description 16-BIT SPI GPIO EXPANDER
Datasheet download datasheet XRA1405 Datasheet
Additional preview pages of the XRA1405 datasheet.

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Full PDF Text Transcription

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XRA1405 16-BIT SPI GPIO EXPANDER WITH INTEGRATED LEVEL SHIFTERS SEPTEMBER 2011 REV. 1.0.0 GENERAL DESCRIPTION The XRA1405 is an 16-bit GPIO expander with an SPI interface. After power-up, the XRA1405 has internal 100K ohm pull-up resistors on each I/O pin that can be individually enabled. In addition, the GPIOs on the XRA1405 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.
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