MCP23009-E/P Microchip Technology, MCP23009-E/P Datasheet - Page 26

• Manufacturer Part Number: MCP23009-E/P
• Description: IC I/O EXPANDER I2C 8B 18DIP
• Manufacturer: Microchip Technology

Specifications of MCP23009-E/P

• Interface: I²C
• Number Of I /o: 8
• Interrupt Output: Yes
• Frequency - Clock: 3.4MHz
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 18-DIP (0.300", 7.62mm)
• Chip Configuration: 8 Bit
• Bus Frequency: 3.4MHz
• Ic Interface Type: I2C
• No. Of I/o's: 8
• Supply Voltage Range: 1.8V To 5.5V
• Digital Ic Case Style: DIP
• No. Of Pins: 18
• Termination Type: DIP
• Filter Terminals: DIP
• Rohs Compliant: Yes
• Features: Open-drain Outputs
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MCP23009/MCP23S09
1.6.11
The OLAT register provides access to the output
latches. A read from this register results in a read of the
OLAT and not the port itself. A write to this register
modifies the output latches that modifies the pins
configured as outputs.
REGISTER 1-11:
DS22121B-page 26
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
R/W-0
OL7
OUTPUT LATCH REGISTER (OLAT)
OL7:OL0: Reflects the logic level on the output latch <7:0>.
1 = Logic-high
0 = Logic-low
R/W-0
OL6
OLAT – OUTPUT LATCH REGISTER 0
W = Writable bit
‘1’ = Bit is set
R/W-0
OL5
R/W-0
OL4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
OL3
R/W-0
OL2
© 2009 Microchip Technology Inc.
x = Bit is unknown
R/W-0
OL1
R/W-0
OL0
bit 0