Catalyst Semiconductor has added a 16-channel I²C/SMBus LED driver/blinker to its line of bus products. The CAT9552 drives up to 16 LEDs at 25 mA each, in either programmable flashing or on/off modes. It is ideal for applications including advertising point-of-sale signage with flashing LEDs, and any type of consumer or industrial equipment with on/off LED indicators.
The CAT9552 is designed with an internal oscillator and two programmable on/off or blink rate timers, adjustable from 0,02 to 5,8 seconds. This oscillator and its two timers reduce overall parts count and substantially reduce the I²C bus traffic, which would normally occur if traditional bus expanders were used. An added benefit is that I/Os not used for controlling LEDs can be used as general-purpose I/Os (GPIOs).
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