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Product OverviewThe MAX7321AEE+ is a I2C port expander with 8 open-drain I/O in 16 pin QSOPpackage. This 2-wire serial interfaced peripheral features an eight open-drainI/O ports with selectable internal pull-ups and transition detection. Any portmay be used as a logic input or an open-drain output. Ports are overvoltageprotected to +6V independent of supply voltage. All I/O ports configured asinputs are continuously monitored for state changes (transition detection).State changes are indicated by the open-drain INT(complementary) output. Theinterrupt is latched, allowing detection of transient changes. When MAX7321 issubsequently accessed through serial interface any pending interrupt is cleared.The open-drain outputs are rated to sink 20mA and are capable of driving LEDs.It is used in cell phones, SAN/NAS, servers, satellite radio and notebooks.Supply voltage range is 1.71V to 5.5VOperating temperature range from -40°C to 125°C400KHz I2C serial interface8 open-drain I/O ports rated to 20mA sink currentAny port can be a logic input or an open-drain outputSelectable I/O port power-up default logic statesTransient changes are latched allowing detection between read operationsINT(complementary) output alerts change on inputsLow 0.6µA (typ) standby currentLow 0.6µA (typ) standby currentProduct InformationChip Configuration: -Bus Frequency: 400kHzIC Interface Type: I2CSupply Voltage Min: 1.71VSupply Voltage Max: 5.5VInterface Case Style: QSOPNo. of Pins: 16PinsNo. of I/O's: 8I/O'sProduct Range: -Automotive Qualification Standard: -MSL: MSL 1 - Unlimited