I assumed you're referring to this project:
http://www.electronics-lab.com/projects/oscillators_timers/016/
and you're also looking for "I am looking for a "MAX083 Function Generator". [see project]"
but I can't understand if you're looking for datasheet or the chip itself.. ??? ???
Good news you can request a free sample from MAXIM!!
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1257