MAX7315ATE+ (MAXIM INTEGRATED PRODUCTS)

The MAX7315ATE+ is an 8 port I/O expander with LED intensity control, interrupt and hot insertion protection in 16 pin TQFN package. This I2C/SMBus compatible serial interfaced peripheral device provides microprocessors with 8 I/O ports. Each I/O port can be individually configured as either an open-drain current sinking output rated at 50mA at 5.5V or logic input with transition detection. A ninth port can be used for transition detection interrupt or as general purpose output. The outputs are capable of directly driving LEDs or providing logic outputs with external resistive pull-up up to 5.5V. PWM current drive is integrated with 8bits of control. Four bits are global control and apply to all LED outputs to provide coarse adjustment of current from fully OFF to fully ON in 14 intensity steps. Each output then has individual 4bit control which further divides globally set current into 16 more steps. It is used in LED status indication, RGB LED drivers, LCD & keypad backlights.