Features of MCP23S17 SPI Interface
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16-bit input/output port expander with interrupt output
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Cascadable for up to 8 devices on one bus
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25mA sink/source capability per I/O
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Supports up to 10MHz SPI clock speeds
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Max. Bus Frequency 10000 (kBits/s)
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Operating Voltage Range 1.8 to 5.5 (V)
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Operating Temp Range -40 to 125 (C)
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