I2C Interfaced 16-bit LED Dimmer, I2C Interfaced 16-bit LED Blinker

Features

■ 256 discrete brightness steps for easy LED dimming and color mixing

■ two programmable blinking rate between 0.625 sec and 1.6 sec for CAT9532; 0.02sec and 6.4 sec for CAT9552

■ eliminates repeated commands to turn on/off LEDs, reducing I2C traffi c

■ drives up to 16 LEDs; any bit that is not used to drive an LED can be used as a GPIO

■ 25mA sink current per bit (max 200mA per device)

■ each port can be individually turned on, off, or programmed to blink

■ during power-up or when a manual reset (hardware reset) is asserted, all outputs are set to off-mode

■ built in noise fi lter for SDA/SCL inputs

■ 0-400KHz clock frequency

Applications

■ LED dimming

■ LCD backlighting

■ celluar phones