I am new to this microcontroller thing and I am trying to build the Yap programmer depicted in M. Predko's book. His parts list include some parts that I am having trouble identifying. First is an LVT827 opto-isolator,second is a xc307 16 MHz /Programmable Oscillator. I have looked through Digi-key and Newark and many other suppliers and some of then match the part when I do a search but since I am totally familiar with these parts its hard to make sure they're the right ones. Thank for any help in advance.                         
                                                                                    With Regards,
                                                                                    Steve