Microchip 16-Bit I2C I/O Expander SOIC-28
16-bit I2C I/O expander, 1.7MHz, 1.8V-5.5V, SOIC-28, low standby current. Ideal for expanding I/O in embedded and industrial applications.
The Microchip 16-Bit I/O Expander with Serial Interface provides a robust solution for expanding your microcontroller's I/O capabilities over an I2C interface. This 16-bit remote bidirectional I/O port operates with a flexible supply voltage range from 1.8V to 5.5V, making it suitable for a wide array of low-power and standard logic applications.
Key Features:
- High-Speed I2C Interface: Operates at up to 1.7MHz, enabling fast communication with your host controller.
- Flexible Addressing: Three hardware address pins allow up to 8 devices to coexist on the same I2C bus.
- Configurable Interrupt Outputs: Two interrupt pins (INTA, INTB) can be configured independently or together, with active-high, active-low, or open-drain options.
- Smart Interrupt Handling: Interrupts can be triggered on changes from configured register defaults or individual pin changes, plus a polarity inversion register for input port logic.
- Low Power Consumption: With a standby current of just 1µA, it is ideal for battery-powered equipment.
- External Reset Input: Provides a reliable hardware reset capability for critical systems.
- Wide Temperature Range: Specified for operation from -40°C to +125°C, ensuring reliability in demanding environments.
Package & Specifications:
- Package: SOIC-28 (28 pins)
- Number of I/Os: 16
- Supply Voltage: 1.8V to 5.5V
- Operating Temperature: -40°C to +125°C
The device simplifies system design by allowing I/O expansion without complex wiring, making it perfect for applications where multiple sensors, LEDs, or switches must be monitored or controlled.
- Expanding microcontroller I/O capabilities in embedded systems
- Controlling multiple LEDs, switches, or sensors via I2C
- Industrial control systems requiring additional digital I/O
- Low-power battery-operated devices
- No. of Bits: 16-bit
- Interfaces: I2C
- Supply Voltage Min: 1.8V
- Supply Voltage Max: 5.5V
- IC Case / Package: SOIC
- No. of Pins: 28
- No. of I/O's: 16
- Operating Temperature Min: -40°C
- Operating Temperature Max: 125°C
- Standby Current: 1µA
- Data Rate: 1.7MHz
- Weight: 1.542 grams
- Height: 43 mm
- Width: 33 mm
- Depth: 15 mm
- Low Standby Current: 1uA
- of Pins: 28Pins
- of I/O's: 16I/O's
- SVHC: No SVHC (04-Feb-2026)
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