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PCA9555 Datasheet 16-bit I2C-bus and SMBus I/O port

Manufacturer: NXP Semiconductors

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General Description

The PCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders.

The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, and smaller packaging.

I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.

Overview

PCA9555 16-bit I2C-bus and SMBus I/O port with interrupt Rev.

10 — 8 November 2017 Product data sheet 1.

Key Features

  • 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 NXP Semiconductors PCA9555.

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