Touch discernment and digital display integrated circuit and external circuit thereof

The utility model relates to a touch discernment and digital display integrated circuit and external circuit thereof, by adopt multiplexing the integrated circuit with a set of pin to realize drive charactron and discernment touch button's function, and 4 12 touch button of multipotency discernment and drives cloudy charactron, 4 positive charactron (or driving 4 LED lightss of four to six -tenehs) altogether. The utility model provides an integrated circuit can help user's simplified design scheme, further saves the IO pin of host computer, saves user's scheme cost greatly, in addition, the integrated circuit also provides the authentication scheme, increases the cost that the third party explaind the design, has reduced user's design effectively by the possibility of shovelling plate, facilicate user control more.