COVID-19 Update: Our online sales are continuing for our CanadianUS and many International customers. Package deliveries are being slightly delayed in transit but are still arriving. Orders are shipped the next business day after they are received. Contact Us for any questions.

PCF8574 I2C to 8-Bit I/O Expander

The PCF8574 module is used to expand the input/output (I/O) ports over an I2C connection with 8-bit input/outputs. Use with microcontrollers (Arduino) over the I2C serial interface.

The device features an 8-bit bidirectional I/O port (P0–P7), including latched outputs with high current drive capability for directly driving LEDs. Each bidirectional I/O can be used as an input or output without the use of a data-direction control signal.

Three on-board jumpers allow for the selection of up to 8 I2C addresses, allowing up to 8 modules for 64 I/O pins can be connected to the same I2C interface. The module also features convenient input and output headers at each end so that additional modules can simply be daisy-chained without the need for additional wires.

To use this module with standard Arduino boards, download the HCPCF8574 library and example sketches.

Addressing:

PCF8574 I2C 8-Bit I/O Expander Addressing from PCBoard.ca

Features:

  • 2.5V to 6V VCC operation
  • Low Standby-Current Consumption of 10 μA Max
  • I2C to 8-bit Parallel-Port Expander
  • Open-Drain Interrupt Output
  • Compatible With Most Microcontrollers
  • Latched Outputs With High-Current Drive Capability for Directly Driving LEDs

Pinout:

  • 1 - VCC: 3.3V or 5V power supply
  • 2 - GND: Power Ground
  • 3 - SDA: I2C Data
  • 4 - SCL: I2C Clock

PCF8574 to Arduino UNO Connection

Arduino UNO to PCF8574 Connection and Drivers

Great article with links to Arduino Sketches and Library downloads.

Dimensions:

PCF8574 I2C 8-Bit I/O Expander from PCBoard.ca

Write a review

Note: HTML is not translated!
    Bad           Good
Captcha

PCF8574 I2C 8-Bit I/O Expander

Arduino Compatible 8 I/O Ports
  • Product Code: PCF8574-I2C-io-Expander
  • Availability: In Stock
  • $3.45 USD


Related Products

LCD Driver Module With I2C Interface

LCD Driver Module With I2C Interface

Arduino Compatible

LCD Interface I2C Serial Interface Board Module - Address Changeable - For Arduino T..

$2.95 USD

Arduino Compatible Mini ATtiny85 With USB

Arduino Compatible Mini ATtiny85 With USB

USB Type-A Interface

Mini ATtiny85 with USB Type-A Interface Arduino Compatible The Digispark compatible developmen..

$4.95 USD