This post may be out of the way as this forum is only for 8051 programming stuff but after searching the net for hours i did not get any thing on the following.

As mentioned in my previous posts that iam planning to design a 8 Lines Telephone Exchange( not a PBX) so following that iam looking to find datahseet for following IC but unable to find them on internet..if some one can please tell me the links to get these datasheets and information i will be very greatful to you.


1) HCF4094BE ( on this IC symbol ST is also written )

2) MC74HC165N

3)SN751768P


and if you have any links to any design notes for SLIC i.e. subcriber Line Interface Circuit please do tell me not like ijaz who sent me a fake schamtic of SLIC.