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I2C Port Expander Evaluation Kit | Cypress Semiconductor

I2C Port Expander Evaluation Kit

Last Updated: 
Jan 29, 2018

This development kit is no longer available. This web page has been left in place for informational purposes only.

i2c Port Expander Evaluation Chip Image

CY3242-IOX Rev. A Kit Contents:
  • I2C Port Expander Evaluation Board
  • I2C-USB Bridge
  • USB Cable (6ft/2m)
  • 5V-2A DC Power Supply
  • Strip of 10 Post Shunts
  • I2C Port Expander Evaluation Kit Mini-CD
Hardware Description
The I2C Port Expander Evaluation Kit allows you to easily assess the following value propositions of Cypress' I2C port expander solutions:
  • Integration
  • Flexibility
  • Compatibility

Cypress' three I2C port expander devices (CY8C9520, CY8C9540, CY8C9560) have the following features:

  • Three compatible part families that seamlessly scale up or down
  • 20, 40, or 60 individually configurable IO (widest range of IOs in the industry)
  • 4, 8, or 16 PWMs that map to any pin or multiple pins (Widest range of PWMs in the industry)
  • 3 Kbytes, 11 Kbytes, or 27 Kbytes of User EEPROM (largest amount of user-accessible serial EEPROM in the industry)
  • I2C communication up to 400 kHz
  • Industrial temp range: -40 to 85 degrees Celsius
  • Operating voltage: 3.0V - 5.25V
  • 28-SSOP/48-SSOP/100-TQFP package options

Bottom line: One Cypress I2C Port Expander device replaces multiple port expander ICs from other vendors and flexibly integrates IO expansion, PWM functions and user EEPROM.


This kit also includes the I2C-USB Bridge, which allows hardware and software debugging of PSoC applications by seamlessly connecting your PC's USB port to your application's I2C interface.