GENERAL DESCRIPTION
SM3501 is a Fan Controller CMOS IC, has three wind modes; normal, rhythm and sleep wind. Four kinds of timer setting and a toggled O/P that can be used as swing/light.

FEATURES
* High performance CMOS technology
* 455KHz or RC type can be selected.
* Two to three wind modes can be selected. Normal, Rhythm and Sleep wind mode.
* Three-wind grade control in each wind mode: Low, Medium and Strong wind.
* Four types of timer setting by PIN option:
  ladder adder (1/2 - 1 - 2 - 4 - 8HRS / 1 - 2 - 4HRS)
  non-ladder adder (1 - 2 - 4 - 8HRS / 1 - 2 - 4HRS)
* SPEED or ON/OFF key can enable fan controller by PIN option

APPLICATIONS
* Electronic Fan
* Heater Fan