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PCA9670 Datasheet Remote 8-bit I/O expander

Manufacturer: NXP Semiconductors

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General Description

The PCA9670 provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)).

The devices consist of eight quasi-bidirectional ports, 1 MHz 30 mA drive I2C-bus interface, three hardware address inputs and a reset input operating between 2.3 V and 5.5 V.

1 MHz I2C-bus Fast-mode Plus (Fm+) can support PWM dimming of LEDs, and higher I2C-bus drive 30 mA allows more devices to be on the bus without the need for bus buffers.

Overview

PCA9670 Remote 8-bit I/O expander for Fm+ I2C-bus with reset Rev.

3 — 30 May 2013 Product data sheet 1.

Key Features

  • I2C-bus to parallel port expander.
  • 1 MHz I2C-bus interface (Fast-mode Plus I2C-bus).
  • SDA with 30 mA sink capability for 4000 pF buses.
  • Operating supply voltage 2.3 V to 5.5 V with 5.5 V tolerant I/Os held to VDD with 100 A current source.
  • 8-bit remote I/O pins that default to inputs at power-up.
  • Latched outputs with 25 mA sink capability for directly driving LEDs.
  • Total package sink capability of 200 mA.
  • Active LOW reset input.
  • Sixty-four programmab.

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