Products > Integrated Circuits (ICs) > Interface ICs > MCP23S08-E/SO

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I/O Expander, 8bit, 10 MHz, Serial, SPI, 1.8 V, 5.5 V, SOIC

Manufacturer : Microchip Technology, Inc
Package/Case : SOIC-18
Product Categories : Interface - I/O Expanders
Datasheet: MCP23S08-E/SO Datasheet (PDF)
RoHs Status: Rohs
In-stock: 69


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MCP23S08-E/SO Product Details

The MCP23S08-E/SO is a 8-bit general purpose, parallel I/O Expansion for SPI applications. The MCP23S08-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. 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.



  • 1 Address inputs for up to 4 devices on one bus
  • 25mA Sink/source capability per I/O
  • Supports up to 10MHz SPI™ clock speed
  • Internal power-on-reset (POR)
  • Polarity inversion register to configure polarity of input port data
  • External reset input
  • 1µA (maximum) Low standby current

MCP23S08-E/SO Products

Technical Parameters

  • Logic Family
  • MCP23S08
  • Number of I/Os
  • 8
  • Maximum Operating Frequency
  • 10 MHz
  • Operating Supply Voltage
  • 1.8 V to 5.5 V
  • Operating Temperature Range
  • - 40 C to + 125 C
  • Mounting Style
  • Package / Case
  • SOIC-18
  • Packaging
  • Tube
  • Interface Type
  • SPI
  • Interrupt Output
  • Yes
  • Operating Current
  • 1 mA
  • Output Current
  • 25 mA
  • Power Dissipation
  • 700 mW
  • Product Type
  • I/O Expanders
  • Factory Pack Quantity
  • 42

MCP23S08-E/SO Datasheet

  • MCP23S08 Technical Documentation of Application Note

MCP23S08-E/SO Equivalent Parts

For the MCP23S08-E/SO component, you may consider these replacement and alternative parts.

Models Manufacturer Package/Case Description
MCP23017-E/SP MICROCHIP DIP-28 I/O EXPANDER, 16 BIT, 1.7MHZ, Chip Configuration:16bit, Bus Frequency:1.7MHz, IC Interface Type:I2C, Serial, Supply Voltage Min:4.5V, Supply Voltage Max:5.5V, No. of I/O's:16
MCP23008-E/SO MICROCHIP SOIC-18 I/O Expander, 8bit, 1.7 MHz, I2C, Serial, 1.8 V, 5.5 V, SOIC
MCP23S17-E/SS MICROCHIP SSOP-28 16-Bit I/O Expander with Serial Interface,I/O Expanders, Repeaters & Hubs 16bit Input/Output Exp SPI interface

MCP23S08-E/SO Related Products

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Microchip Technology, Inc

Microchip Technology Inc. is a leading manufacturer of microcontroller and analog products, providing low-risk product development, lower total system cost, and faster time to market for thousands of diverse customer applications worldwide. Microchip offers outstanding technical support along with d...
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