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PCF8575 16-Bit I2C I/O Expander Module for Arduino & R3

PCF8575 16-Bit I2C I/O Expander Module for Arduino & R3

HK$25.00
HK$25.00
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Delivery Options

  • Local delivery within Hong Kong and in-store pickup.​
  • Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
  • Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
  • Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
  • In-store pickup details (location and time) will be confirmed by email or phone message.​
  • Delivery times are estimates and may be affected by weather or unforeseen circumstances.​

Overview: Solve Your I/O Pin Shortage

Are you running out of digital input/output pins on your Arduino or other microcontrollers? This powerful PCF8575 I2C I/O Expander Module is your simple solution!

It allows you to expand your project's digital I/O capacity by an incredible 16 pins, all while using only two I/O pins on your main board for the I2C control interface. Perfect for projects that need to control multiple relays, buzzers, or LEDs.

 

Key Features & Benefits

  • Massive I/O Expansion: Instantly add 16 near-bi-directional digital input/output pins to your project.
  • Simple Control: Uses the universally common I2C / IIC / SMBus interface, requiring only SDA and SCL pins.
  • Interrupt Output: Features a dedicated open-drain interrupt output pin (INT), enabling your microcontroller to react instantly to any change in the input status without constant polling.
  • Level Compatibility: Includes an on-board 3.3V level converter circuit for flexible use across various systems. By default (pad VCC-VDD open), the PCF8575 operates at 3.3V. If you solder the VCC-VDD pad, the level will match your VCC supply (e.g., 5V).
  • Individual Addressing: All 16 pins are individually addressable and can be configured as either an input or an output pin.
  • Easy Setup: Compatible with the standard PCF8575 Arduino library.

 

Specifications

Characteristic Detail
Operating Voltage 2.5V to 5.5V DC
Max Operating Current 100mA (Max)
Interface I2C / IIC / SMBus
I2C Address 0x20 (Default, modifiable via A1/A2 solder pads)
Pins 16 Individually Addressable I/O Pins
Compatibility Arduino R3, ESP32, ESP8266, and other MCUs.
Ideal For Control of Relay Banks, Buzzers, Push Buttons, LEDs.

 

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