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PCF8574 IO Expansion Board

PCF8574 IO Expansion Board

http://www.abdullah-electronics.com/web/image/product.template/33/image_1920?unique=e7d3e1a
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The PCF8574 I/O Expansion Board is an I²C-based digital I/O expander that adds 8 additional GPIO pins to microcontrollers using only two I2C lines. It’s ideal for projects where pin count is limited, such as with Arduino, ESP32, or Raspberry Pi.

2,750 IQD 2750.0 IQD 2,750 IQD

2,750 IQD

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Features Applications

Features

  • Provides 8-bit I/O expansion via I²C interface
  • Cascadable for more GPIO (up to 8 devices)
  • Each pin configurable as input or output
  • Low power consumption and compact design
  • Widely used with LCDs, keypads, and other peripherals

Applications

  • Controlling relays or LEDs with limited MCU pins
  • Expanding I/O for ESP8266/ESP32
  • Matrix keypad reading
  • I²C LCD adapters
  • Home automation and industrial projects
General Environmental Physical 

General 

  • Chipset: PCF8574 / PCF8574T
  • Interface: I²C (SDA, SCL)
  • I/O Pins: 8 (P0–P7)
  • Address Range: 0x20 to 0x27 (set by A0–A2)
  • Operating Voltage: 2.5V – 5.5V
  • Output Current: ~25mA per pin (max)

Environmental

  • Operating Temperature: -40°C to +85°C
  • Humidity: ≤85% RH (non-condensing)

Physical 

  • Dimensions: ~20mm × 15mm (varies by board)
  • Mounting: Header pins or screw holes
  • Weight: ~3g
  • Compatible Boards: Arduino, ESP32, Raspberry Pi, STM32

No examples available yet. Stay tuned for updates!