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MCP23008 Dataheets PDF



Part Number MCP23008
Manufacturers Microchip Technology
Logo Microchip Technology
Description 8-Bit I/O Expander
Datasheet MCP23008 DatasheetMCP23008 Datasheet (PDF)

MCP23008/MCP23S08 8-Bit I/O Expander with Serial Interface Features • 8-Bit Remote Bidirectional I/O Port - I/O pins default to input • High-Speed I2C Interface (MCP23008) - 100 kHz - 400 kHz - 1.7 MHz • High-Speed SPI Interface (MCP23S08) - 10 MHz • Hardware Address Pins - Three for the MCP23008 to allow up to eight devices on the bus - Two for the MCP23S08 to allow up to four devices using the same Chip Select • Configurable Interrupt Output Pin - Configurable as active-high, active-low or op.

  MCP23008   MCP23008


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MCP23008/MCP23S08 8-Bit I/O Expander with Serial Interface Features • 8-Bit Remote Bidirectional I/O Port - I/O pins default to input • High-Speed I2C Interface (MCP23008) - 100 kHz - 400 kHz - 1.7 MHz • High-Speed SPI Interface (MCP23S08) - 10 MHz • Hardware Address Pins - Three for the MCP23008 to allow up to eight devices on the bus - Two for the MCP23S08 to allow up to four devices using the same Chip Select • Configurable Interrupt Output Pin - Configurable as active-high, active-low or open-drain Block Diagram MCP23S08 SCK SI SO MCP23008 SCL MCP23S08 SDA A1:A0 A2:A0 3 RESET INT Serial Interface Decode Interrupt Logic VDD VSS POR • Configurable Interrupt Source - Interrupt-on-change from configured defaults or pin change • Polarity Inversion Register to Configure the Polarity of the Input Port Data • External Reset Input • Low Standby Current: 1 µA (max.) • Operating Voltage: - 1.8V to 5.5V at -40°C to +85°C I2C at 100 kHz SPI at 5 MHz - 2.7V to 5.5V at -40°C to +85°C I2C at 400 kHz SPI at 10 MHz - 4.5V to 5.5V at -40°C to +125°C I2C at 1.7 kHz SPI at 10 MHz Packages • 18-pin PDIP (300 mil) • 18-pin SOIC (300 mil) • 20-pin SSOP • 20-pin QFN Serializer/ Deserializer 8 Control GPIO 8 Configuration/ Control Registers GP0 GP1 GP2 GP3 GP4 GP5 GP6 GP7  2004-2019 Microchip Technology Inc. DS20001919F-page 1 MCP23008/MCP23S08 Package Types SCL SDA A2 A1 A0 RESET NC INT VSS PDIP/SOIC 1 18 2 17 3 16 4 15 5 14 6 13 7 12 8 11 9 10 MCP23008 MCP23008 MCP23008 VDD GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0 SCL SDA A2 A1 A0 RESET NC INT VSS N/C SSOP 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VDD GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0 N/C QFN GP7 VSS VDD SCL SDA 16 17 18 19 20 A2 A1 A0 RESET NC 1 15 2 14 3 MCP23008 13 4 12 5 11 GP6 GP5 GP4 GP3 GP2 10 9 8 7 6 GP1 GP0 N/C INT N/C  2004-2019 Microchip Technology Inc. DS20001919F-page 2 MCP23008/MCP23S08 Package Types: (Continued) SCK SI SO A1 A0 RESET CS INT VSS PDIP/SOIC 1 18 2 17 3 16 4 15 5 14 6 13 7 12 8 11 9 10 MCP23S08 MCP23S08 MCP23S08 VDD GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0 SCK SI SO A1 A0 RESET CS INT VSS N/C SSOP 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VDD GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0 N/C QFN GP7 VSS VDD SCK SI 16 17 18 19 20 SO A1 A0 RESET CS 1 15 2 14 3 MCP23S08 13 4 12 5 11 GP6 GP5 GP4 GP3 GP2 10 9 8 7 6 GP1 GP0 N/C INT N/C  2004-2019 Microchip Technology Inc. DS20001919F-page 3 MCP23008/MCP23S08 1.0 DEVICE OVERVIEW The MCP23X08 device provides 8-bit, general purpose, parallel I/O expansion for I2C bus or SPI applications. The two devices differ in the number of hardware address pins and the serial interface: • MCP23008 – I2C interface; three address pins • MCP23S08 – SPI interface; two address pins The MCP23X08 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. The interrupt output can be configured to activate under two conditions (mutually exclusive): 1. When any input state differs from its corresponding Input Port register state, this is used to indicate to the system master that an input state has changed. 2. When an input state differs from a preconfigured register value (DEFVAL register). The Interrupt Capture register captures port values at the time of the interrupt, thereby saving the condition that caused the interrupt. The Power-on Reset (POR) sets the registers to their default values and initializes the device state machine. The hardware address pins are used to determine the device address. 1.1 Pin Descriptions TABLE 1-1: PINOUT DESCRIPTION Pin Name PDIP/ SOIC QFN SSOP Pin Type Function SCL/SCK 1 SDA/SI 2 A2/SO 3 A1 4 A0 5 RESET 6 NC/CS 7 INT 8 VSS 9 GP0 10 GP1 11 GP2 12 GP3 13 GP4 14 GP5 15 GP6 16 GP7 17 VDD 18 N/C — 19 1 I Serial clock input. 20 2 I/O Serial data I/O (MCP23008)/Serial data input (MCP23S08). 1 3 I/O Hardware address input (MCP23008)/ Serial data output (MCP23S08). A2 must be biased externally. 2 4 I Hardware address input. Must be biased externally. 3 5 I Hardware address input. Must be biased externally. 4 6 I External Reset input. Must be biased externally. 5 7 I No connect (MCP23008)/External Chip Select input (MCP23S08). 7 8 O Interrupt output. Can be configured for active-high, active-low or open-drain. 17 9 P Ground. 9 12 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. 10 .


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