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PCA9671PW Datasheet Remote 16-bit I/O expander

Manufacturer: NXP Semiconductors

Download the PCA9671PW datasheet PDF. This datasheet also includes the PCA9671 variant, as both parts are published together in a single manufacturer document.

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Note: The manufacturer provides a single datasheet file (PCA9671_PhilipsSemiconductors.pdf) that lists specifications for multiple related part numbers.

General Description

The PCA9671 provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C-bus) and is a part of the Fast-mode Plus (Fm+) family.

The PCA9671 is a drop in upgrade for the PCF8575 providing higher I2C-bus speeds (1 MHz versus 400 kHz) so that the output can support PWM dimming of LEDs, higher I2C-bus drive (30 mA versus 3 mA) so that many more devices can be on the bus without the need for bus buffers, higher total package sink capacity (400 mA versus 100 mA) that supports having all 25 mA LEDs on at the same time and more device addresses (64 versus 8) to allow many more devices on the bus without address conflicts.

The difference between the PCA9671 and the PCF8575 is that the interrupt output on the PCF8575 is replaced by a RESET input on the PCA9671.

Overview

PCA9671 Remote 16-bit I/O expander for Fm+ I2C-bus with reset Rev.

3 — 29 September 2011 Product data sheet 1.

Key Features

  • 1 MHz I2C-bus interface.
  • Compliant with the I2C-bus Fast-mode and Standard-mode.
  • SDA with 30 mA sink capability for 4000 pF buses.
  • 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os.
  • 16-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 400 mA.
  • Active LOW reset input.
  • 64 programmable slave addresses using 3 address pins.
  • Readable device ID.

More Datasheets from NXP Semiconductors

Part Number Description
PCA9671 Remote 16-bit I/O expander
PCA9671D Remote 16-bit I/O expander
PCA9670 Remote 8-bit I/O expander
PCA9670D Remote 8-bit I/O expander
PCA9672 Remote 8-bit I/O expander
PCA9672D Remote 8-bit I/O expander
PCA9673D Remote 16-bit I/O expander
PCA9673PW Remote 16-bit I/O expander
PCA9674AD Remote 8-bit I/O expander
PCA9674D Remote 8-bit I/O expander