The MAX7325ATG+ is an I2C port expander with 8 push-pull and 8 open-drain I/Os in 24 pin TQFN package. This 2-wire serial interfaced peripheral device has 16 I/O ports. Ports are divided into eight push-pull outputs and eight I/Os with selectable internal pull-ups and transition detection. Eight ports are push-pull outputs and eight I/Os may be used as a logic input or an open-drain output. All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by active-low INT output. The interrupt is latched allowing detection of transient changes. The active-low RST input clears serial interface by terminating any I2C communication to or from MAX7325. It uses two address inputs with four level logic to allow 16 I2C slave addresses. The slave address also determines power-up logic state for I/O ports and enables or disables internal 40Kohm pull-ups in groups of four ports.
● Operating Supply voltage range from 1.71V to 5.5V
● Automotive temperature range from -40°C to 125°C
● 400KHz I2C serial interface
● Open-drain outputs are rated to sink 20mA and are capable of driving LEDs
● Selectable I/O port power-up default logic states
● Transient changes are latch allowing detection between read operations
● AD0 and AD2 inputs select from 16 slave addresses
● I/O ports are overvoltage protected to +6V
● Standby current (interface idle) of 0.6µA at TA = -40°C to 125°C and power-on reset voltage of 1.6V
● Supply current (interface running) of 23µA at TA = -40°C to 125°C
