Key Features:
- 
16 Additional GPIO Pins – Expand your microcontroller’s I/O without upgrading hardware 
- 
I²C Bus Communication – Requires only two data lines (SCL & SDA) 
- 
Interrupt Capability – Trigger actions immediately based on input state changes 
- 
Individually Configurable Pins – Input/output, pull-ups, interrupts, and polarity 
- 
Low Power Standby – Suitable for battery-operated systems 
Technical Specifications:
- 
Operating Voltage: 1.8V – 5.5V 
- 
Communication Interface: I²C (up to 1.7 MHz) 
- 
Number of GPIO Pins: 16 (2 x 8-bit ports) 
- 
Interrupt Support: 2 interrupt output pins 
- 
Pull-Up Resistors: Configurable per pin 
- 
Package Type: DIP-28 
- 
Operating Temperature: -40°C to +125°C 
Applications:
- 
Home Automation Systems 
- 
Robotics and Mechatronics 
- 
Industrial Control Panels 
- 
Sensor and Peripheral Expansion 
- 
STEM and Educational Kits