MAX7360 Datasheet | Maxim Integrated

19-4566; Rev 0; 4/09 .. TION KIT EVALUA BLE A IL A AV I2C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection General Description The MAX7360 peripheral provides microprocessors with management of up to 64 key switches, with an additional eight LED drivers/GPIOs that feature constant-current, PWM intensity control, and rotary switch control options. The key-switch drivers interface with metallic or resistive switches with on-resistances up to 5k I. Key inputs are monitored statically, not dynamically, to ensure low-EMI operation. The MAX7360 Features autosleep and autowake modes to further minimize the power consumption of the device. The autosleep feature puts the device in a low-power state (1FA typ) after a sleep timeout period. The autowake feature configures the MAX7360 to return to normal operating mode from sleep upon a keypress. The key controller debounces and maintains a FIFO of keypress and release events (including autorepeat, if enabled). An interrupt (INTK) output can be configured to alert keypresses, as they occur, or at maximum rate. There are eight open-drain I/O ports, which can be used to drive LEDs. The maximum constant-current level for each open-drain port is 20m A. The intensity of the LED on each open-drain port can be individually adjusted through a 256-step PWM control. An input port pair (PORT6, PORT7) can be configured to accept 2-bit gray code inputs from a rotary switch. In addition, if not used for key-switch control, up to six column pins can be used as general-purpose open-drain outputs (GPOs) for LED drive or logic control. The MAX7360 is offered in a 40-pin (5mm x 5mm) thin QFN package with an exposed pad, and a small 36-bump wafer level package (WLP) for cell phones, pocket PCs, and other portable consumer electronic applications. The MAX7360 operates over the -40NC to +85NC extended temperature range. I2C-interfaced S Integrated ESD Protection Features Q8k V IEC 61000-4-2...