4051 as demultiplexer

Try using CD4051 when you google for the info. Some examples ...

http://www.jameco.com/webapp/wcs/stores/servlet/CatalogSearchResultView?langId=-1&storeId=10001&catalogId=10001&searchType=m&searchValue=4051&categoryId=104210

http://www.jameco.com/Jameco/Products/ProdDS/13098.pdf

http://www.us.oup.com/us/pdf/microcircuits/students/logic/cd4051-ti.pdf

Good Luck!