MCP23008-E/SO

MCP23008/MCP23S08 8-Bit I/O Expander with Serial Interface Features Package Types 8-bit remote bidirectional I/O port MCP23008 PDIP/SOIC - I/O pins default to input 2 1 18 VDD SCL High-speed I C interface (MCP23008) GP7 2 17 SDA -100kHz 3 16 GP6 A2 -400kHz GP5 4 15 A1 -1.7MHz A0 5 14 GP4 High-speed SPI interface (MCP23S08) 6 13 GP3 RESET 7 12 GP2 -10MHz NC 8 11 GP1 INT Hardware address pins GP0 9 10 VSS - Three for the MCP23008 to allow up to eight devices on the bus SSOP - Two for the MCP23S08 to allow up to four 1 20 SCL VDD devices using the same chip-select 2 19 SDA GP7 Configurable interrupt output pin 3 18 A2 GP6 - Configurable as active-high, active-low or 4 17 A1 GP5 open-drain 5 16 A0 GP4 Configurable interrupt source 6 15 GP3 RESET 7 14 NC GP2 - Interrupt-on-change from configured defaults INT 8 13 GP1 or pin change 12 9 VSS GP0 Polarity Inversion register to configure the polarity 10 11 N/C N/C of the input port data External reset input Low standby current: 1 A (max.) MCP23S08 PDIP/SOIC Operating voltage: - 1.8V to 5.5V -40C to +85C (I-Temp) 1 18 VDD SCK GP7 2 17 - 2.7V to 5.5V -40C to +85C (I-Temp) SI 3 16 GP6 SO - 4.5V to 5.5V -40C to +125C (E-Temp) 4 15 GP5 A1 5 14 GP4 A0 Packages 6 13 GP3 RESET 7 12 GP2 18-pin PDIP (300 mil) CS GP1 8 11 INT 18-pin SOIC (300 mil) 9 10 GP0 VSS 20-pin SSOP SSOP 1 20 VDD SCK 2 19 GP7 SI 3 18 GP6 SO 4 17 GP5 A1 5 16 GP4 A0 RESET 6 15 GP3 7 14 CS GP2 13 INT 8 GP1 9 12 VSS GP0 11 10 N/C N/C 2005 Microchip Technology Inc. DS21919B-page 1 MCP23008 MCP23008 MCP23S08 MCP23S08MCP23008/MCP23S08 Block Diagram MCP23S08 SCK SI SO MCP23008 GP0 SCL Serializer/ Serial 8 GP1 SDA Deserializer Interface GP2 MCP23S08 GP3 3 A1:A0 A2:A0 Decode GPIO GP4 Control GP5 RESET GP6 Interrupt GP7 INT Logic 8 VDD POR Configuration/ Control VSS Registers DS21919B-page 2 2005 Microchip Technology Inc.