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16 Bit I2C I/O Expander

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Product Description


Up for sale is a PCA9555 based I/O Expander with I2C interface for use with all microcontrollers!

PCA9555 Breakout Board Features:
  • Add 16 additional inputs or outputs to your controller over an I2C interface
  • Interrupt pin informs on input change
  • Simple I2C interface 
  • On board LED to indicate power to module
  • Mounting hole for 4-40 standoff
  • On board address solder jumpers allow up to 8 devices for a total of 128 extra I/Os
  • On board pull up resistors for INT, SDA, SCL with selectable solder jumpers
  • Small footprint of just 25.4x25.4mm
  • Header pins included
Features of the PCA9555 from the manufacturer:
  • Operating power supply voltage range of 2.3 V to 5.5 V
  • 5 V 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
  • 0 Hz to 400 kHz clock frequency
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per
  • JESD22-A115, and 1000 V CDM per JESD22-C101

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