MCP23S17-E/SO MICROCHIP I/O Expander, 16 bit, Serial, SPI, 1.8 V, 5.5 V, SOIC, 28 Pins


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Approx Restocking Date: 25 to 30 Days
SKU: 1743737
  1. Brand: MICROCHIP
  2. Configuration: 16bit
  3. No. of Bits: 16bit
  4. Frequency (MHz): 10MHz
  5. Interfaces: Serial, SPI

 201.00 (Incl. GST)

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Brand: Microchip
Category: Drivers & Interfaces IC

The MCP23S17-E/SO device provides 16-bit, general-purpose parallel I/O expansion for I2C bus or SPI applications. The device has an I2C interface. The MCP23S17-E/SO consists of multiple 8-bit configuration registers for input, output, and polarity selection. The system master can enable the I/Os as either inputs or outputs by writing the I/O configuration bits (IODIRA/B). The data for each input or output is kept in the corresponding input or output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master. The 16-bit I/O port functionally consists of two 8-bit ports (PORTA and PORTB). The MCP23S17-E/SO can be configured to operate in the 8-bit or 16-bit modes via IOCON.BANK.


Communications & Networking, Consumer Electronics, Embedded Design & Development, Multimedia.

Note: For more technical details go through Datasheet in the attachment section.


  1. High-speed I2C interface
  2. Three hardware address pins to allow up to eight devices on the bus
  3. Configurable interrupt output pins
  4. Configurable as active high, active low or open drain
  5. INTA and INTB can be configured to operate independently or together
  6. Configurable interrupt source
  7. Interrupt on change from configured register defaults or pin changes
  8. Polarity Inversion register to configure the polarity of the input port data

Package Includes:

1 x MCP23S17-E/SO MICROCHIP I/O Expander, 16 bit, Serial, SPI, 1.8 V, 5.5 V, SOIC, 28 Pins

SKU: 1743737 Category:




No. of Bits


Frequency (MHz)



Serial, SPI

Minimum Supply Voltage (V)


Maximum Supply Voltage (V)


Case / Package:


No. of Pins


No. of I/Os


Operating Temperature (°C)


Maximum Temperature(°C):


Product Range

MCP23017, MCP23S17

Shipping Weight 0.001 kg
Shipping Dimensions 7 × 5 × 1 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China