GENERAL DESCRIPTION
SM3502 is a Fan Controller CMOS IC that can be applied to a variety of consumer products. SM3502 has three wind modes; normal, rhythm and sleep-rhythm wind. Four kinds of timer setting and one swing head control or light control.
Memory function is available; the Speed, Mode, Swing functions will operate as last state in memory type. If the last state is Sleep mode, press SPEED key enable fan controller while memory functions will be returned to the last state before Sleep Mode operation.

FEATURES
* High performance CMOS technology.
* Four types of timer setting:
   Ladder adder (1/2-1-2-4hrs)
   Non-ladder adder (1-2-4-8hrs)
* One swing head control or light control.
* SPEED key can enable fan controller.
* 18 pin plastic DIP package.
* 455KHz oscillator.

APPLICATIONS
* Electronic Fan
* Heater Fan
* Air-Cleaner
* Dehumidifier
* Humidifier
* Kitchen Exhaust
* Dish Dryer
* Wall Fan