MCP23008-E/SO Microchip Technology, MCP23008-E/SO Datasheet - Page 14

• Manufacturer Part Number: MCP23008-E/SO
• Description: IC I/O EXPANDER I2C 8B 18SOIC
• Manufacturer: Microchip Technology

Specifications of MCP23008-E/SO

• Package / Case: 18-SOIC (7.5mm Width)
• Interface: I²C
• Number Of I /o: 8
• Interrupt Output: Yes
• Frequency - Clock: 1.7MHz
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Includes: POR
• Logic Family: MCP23008
• Propagation Delay Time: 50 ns
• Operating Supply Voltage: 1.8 V to 5.5 V
• Power Dissipation: 700 mW
• Operating Temperature Range: - 40 C to + 125 C
• Input Voltage: 1.8 V to 5.5 V
• Logic Type: I/O Expander
• Maximum Clock Frequency: 10 MHz
• Maximum Operating Frequency: 1.7 MHz
• Mounting Style: SMD/SMT
• Output Current: 25 mA
• Output Voltage: 1.8 V to 4.5 V
• Chip Configuration: 8 Bit
• Bus Frequency: 1.7MHz
• Ic Interface Type: I2C, Serial
• No. Of I/o's: 8
• Supply Voltage Range: 1.8V To 5.5V
• Digital Ic Case Style: SOIC
• No. Of Pins: 18
• Delay Time: 50ns
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: GPIODM-KPLCD - BOARD DEMO LCD GPIO EXP KEYPAD
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP23008/MCP23S08
1.6.7
The GPPU register controls the pull-up resistors for the
port pins. If a bit is set and the corresponding pin is
configured as an input, the corresponding port pin is
internally pulled up with a 100 k resistor.
REGISTER 1-7:
DS21919B-page 14
bit 7-0
PULL-UP RESISTOR
CONFIGURATION (GPPU)
REGISTER
GPPU – GPIO PULL-UP RESISTOR REGISTER (ADDR 0x06)
PU7:PU0: These bits control the weak pull-up resistors on each pin (when configured as an
input) <7:0>.
1 = Pull-up enabled.
0 = Pull-up disabled.
bit 7
Legend:
R = Readable bit
- n = Value at POR
R/W-0
PU7
R/W-0
PU6
R/W-0
PU5
W = Writable bit
‘1’ = Bit is set
R/W-0
PU4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
PU3
R/W-0
PU2
© 2005 Microchip Technology Inc.
x = Bit is unknown
R/W-0
PU1
R/W-0
PU0
bit 0