Microchip (MCP23009-E/SS) I/O Expander, 8bit, 3.4 MHz

Product OverviewThe MCP23009-E/SS is an 8-bit I/O Expander with open-drain outputs. It consistsof multiple 8-bit configuration registers for input, output and polarityselection. The system master can enables I/Os as either inputs or outputs bywriting the I/O configuration bits. The data for each input or output is kept inthe corresponding input or output register. The polarity of the input portregister can be inverted with the polarity inversion register. All registers canbe read by the system master. The Interrupt capture register captures portvalues at the time of the interrupt, thereby saving the condition that causedthe interrupt. The Power-on reset (POR) sets the registers to their defaultvalues and initializes the device state machine. The hardware address pin isused to determine the device address.Open-drain outputsConfigurable as active-high, active-low or open-drainInterrupt-on-change from configured defaults or pin changePolarity inversion register to configure the polarity of the input port dataExternal reset inputApplicationsIndustrialProduct InformationChip Configuration: 8bitBus Frequency: 3.4MHzIC Interface Type: I2CSupply Voltage Min: 1.8VSupply Voltage Max: 5.5VInterface Case Style: SSOPNo. of Pins: 20PinsNo. of I/O's: 9I/O'sProduct Range: -Automotive Qualification Standard: -MSL: MSL 1 - Unlimited