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16-Bit I/O Expander with Serial Interface,I/O Expanders, Repeaters & Hubs 16bit Input/Output Exp I2C interface

Manufacturer : Microchip Technology, Inc
Package/Case : SSOP-28
Product Categories : I/O Expanders, Repeaters & Hubs
Datasheet: MCP23017T-E/SS Datasheet (PDF)
RoHs Status: Rohs
In-stock: 5500


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MCP23017T-E/SS Product Details

The MCP23017/MCP23S17 (MCP23X17) devicefamily provides 16-bit, general purpose parallel I/Oexpansion for I2C bus or SPI applications. The twodevices differ only in the serial interface:• MCP23017T-E/SS – I2C interface• MCP23S17 – SPI interfaceThe MCP23X17 consists of multiple 8-bit configurationregisters for input, output and polarity selection. Thesystem master can enable the I/Os as either inputs oroutputs by writing the I/O configuration bits (IODIRA/B).The data for each input or output is kept in thecorresponding input or output register. The polarity ofthe Input Port register can be inverted with the PolarityInversion register. All registers can be read by thesystem master.

The 16-bit I/O port functionally consists of two 8-bitports (PORTA and PORTB). The MCP23X17 can beconfigured to operate in the 8-bit or 16-bit modes viaIOCON.BANK.There are two interrupt pins, INTA and INTB, that canbe associated with their respective ports, or can belogically OR’ed together so that both pins will activate ifeither port causes an interrupt.The interrupt output can be configured to activateunder two conditions (mutually exclusive):1. When any input state differs from itscorresponding Input Port register state. This isused to indicate to the system master that aninput state has changed.2. When an input state differs from a preconfigured register value (DEFVAL register).

The Interrupt Capture register captures port values atthe time of the interrupt, thereby saving the conditionthat caused the interrupt.The Power-on Reset (POR) sets the registers to theirdefault values and initializes the device state machine.The hardware address pins are used to determine thedevice address.



  • 16-bit input/output port expander with interrupt output
  • Cascadable for up to 8 devices on one bus
  • 25mA sink/source capability per I/O
  • Supports 100kHz, 400kHz and 1.7MHz I2C™Compatible compatible modes

MCP23017T-E/SS Products

Technical Parameters

  • Logic Family
  • MCP23X17
  • Number of I/Os
  • 17
  • 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
  • SSOP-28
  • Packaging
  • Reel
  • Interface Type
  • I2C
  • Interrupt Output
  • Yes
  • Operating Current
  • 1 mA
  • Output Current
  • 25 mA
  • Power Dissipation
  • 700 mW
  • Product Type
  • I/O Expanders
  • Series
  • MCP23017
  • Factory Pack Quantity
  • 2100

MCP23017T-E/SS Datasheet

  • MCP23017 Technical Documentation of Application Note

MCP23017T-E/SS Equivalent Parts

For the MCP23017T-E/SS component, you may consider these replacement and alternative parts.

Models Manufacturer Package/Case Description
MCP23S17-E/SO MICROCHIP SOIC-28 Interface - I/O Expanders 16bit Input/Output Exp SPI interface
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
MCP23017-E/SO MICROCHIP SOIC-28 Interface - I/O Expanders 16bit Input/Output Exp I2C interface

MCP23017T-E/SS 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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