Description

The MAX7324 2-wire serial-interfaced peripheral features16 I/O ports that are divided into eight push-pulloutputs and eight inputs. Each input features selectableinternal pullups, overvoltage protection to +6V, andtransition detection with an interrupt output.All input ports are continuously monitored for statechanges (transition detection). The interrupt is latched,allowing detection of transient changes. Any combinationof inputs can be selected using the interrupt maskto assert the active-low INT output. When the MAX7324 is subsequentlyaccessed through the serial interface, anypending interrupt is cleared.The push-pull outputs are rated to sink 20mA and arecapable of driving LEDs. The active-low RST input clears the serialinterface, terminating any I²C communication to or fromthe MAX7324.The MAX7324 uses two address inputs with four-levellogic to allow 16 I²C slave addresses. The slaveaddress also enables or disables internal 40kΩ pullups in groups of four ports.The MAX7324 is one device in a family of pin-compatibleport expanders with a choice of input ports, open-drainI/O ports, and push-pull output ports (see Table 1 in the full data sheet).The MAX7324 is available in 24-pin QSOP and TQFNpackages, and is specified over the -40°C to +125°Cautomotive temperature range.ApplicationsCell PhonesNotebooksSAN/NASSatellite RadioServers