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8-Bit I/O Expander with Open-Drain Outputs
MCP23S09 is an 8-bit I/O expander with SPI interface operating at 10 MHz. The MCP23S09 is available in 18-pin PDIP (300 mil), 18-pin SOIC (300 mil) and 16-pin 3x3mm QFN package
Parameter Name Value
Device Description 8-bit I/O Port Expander
Operating Voltage Range (V) 1.8 to 5.5
Operating Temp Range (°C) -40 to 125
Interface SPI
Max. Bus Frequency (kBits/s) 10000
Features
8-bit remote bidirectional I/O port:
- I/O pins default to input
Open-drain outputs:
- 5.5V tolerant
- 25 mA sink
- 200 mA total
Low standby current as low as 1 μA
High-speed SPI interface at 10 MHz
Configurable interrupt output pins: Configurable as active-high, active-low or open-drain
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
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