I/O Expander Module PCF8574T

Allows to have up to 8 digital inputs/outputs connected through I2C bus.

Product Code 6500

Available We dispatch same day if ordered by 1PM (excluding holidays), then courier usually takes 2-5 days.
Real Time Availability
Ready Stock: 16 nos.
Factory Leadtime for more quantity: 15 days
Quantity Pricing
Quantity :
Price (Discount%)
1-9 :
Rs.160.00/- (0%)
10+ :
Rs.152.00/- (5%)


PCF8574 Datasheet
I/O Expander Module PCF8574T
Sunrom Product Code for Ordering:
The PCF8574 IO Expansion Board is used as a remote 8-bit I/O expander for I2C-bus. Up to 8 PCF8574, IO Expansion Board can be connected to the I2C-bus, providing up to 64 I/O ports.

The PCF8574 IO Expansion Board features an I2C pin header on one side and an I2C connector on the opposite side. Hence, it's more flexible to connect the board to your development system. The board also supports I2C cascading, allowing the use of a multi-module connected to the I2C bus at the same time by connecting the pin header and connector.


  • Working voltage: 2.5-6V
  • Interface: IIC
  • 8-bit parallel port
  • 1 x I/O Expander Module PCF8574T


  • Vcc - supply voltage 2.5-6V
  • GND - ground
  • SDA - I2C data line
  • SDL - I2C clock line
  • P0 .. P7 - digital I/O
  • /INT - interrupt output
  • A0 .. A2 - I2C address settings


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