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PCA9574 Datasheet low voltage GPIO

Manufacturer: NXP Semiconductors

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General Description

The PCA9574 is a CMOS device that provides 8 bits of General Purpose parallel Input/Output (GPIO) expansion in low voltage processor and handheld battery powered mobile applications and was developed to enhance the NXP family of I2C-bus I/O expanders.

The improvements include lower supply current, lower operating voltage of 1.1 V to 3.6 V, dual and separate supply rails to allow voltage level translation anywhere between 1.1 V and 3.6 V, 400 kHz clock frequency, and smaller packaging.

Any of the eight I/O ports can be configured as an input or output independent of each other and default on start-up to inputs.

Overview

PCA9574 8-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt Rev.

6.

Key Features

  • 400 kHz I2C-bus serial interface NXP Semiconductors PCA9574 8-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt.
  • Compliant with I2C-bus Standard-mode (100 kHz).
  • Separate supply rails for core logic and I/O bank provides voltage level shifting.
  • 1.1 V to 3.6 V operation with level shifting feature.
  • Very low standby current: < 1 μA.
  • 8 configurable I/O pins that default to inputs at power-up.
  • Output.

More Datasheets from NXP Semiconductors

Part Number Description
PCA9575 low voltage GPIO
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PCA9513A Hot swappable I2C-bus and SMBus bus buffer
PCA9514A Hot swappable I2C-bus and SMBus bus buffer
PCA9521 Fast dual bidirectional bus buffer
PCA9522 Fast dual bidirectional bus buffer