MCP23009 expander equivalent, 8-bit i/o expander.
* 8-Bit Remote Bidirectional I/O Port: - I/O Pins Default to Input
* Open-Drain Outputs: - 5.5V Tolerant - 25 mA Sink Capable (per Pin) - 200 mA Total
* High.
The two devices differ only in the serial interface.
* MCP23009
ā I2C interface
* MCP23S09
.
TABLE 1-1: I2Cā¢ PINOUT DESCRIPTION (MCP23009)
Pin Name
Pin Number
16-lead 18-lead 20-lead QFN PDIP/SOIC SSOP
Pin Type
Standard Function
VDD
3
1
1 P Power
NC 2 2, 16-17 2, 10-11, ā Not connected 18-19
SCL 4
3
3 I Serial clock input
SDA
.
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