home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!das-news.harvard.edu!cantaloupe.srv.cs.cmu.edu!g3.ius.cs.cmu.edu!rwc
- From: rwc@ius4.ius.cs.cmu.edu (Randy Casciola)
- Newsgroups: sci.electronics
- Subject: High Density PCB Connectors
- Message-ID: <C0psD4.62v.2@cs.cmu.edu>
- Date: 12 Jan 93 00:07:52 GMT
- Article-I.D.: cs.C0psD4.62v.2
- Sender: rwc@g3.ius.cs.cmu.edu (Randy Casciola)
- Organization: CMU Vision and Autonomous Systems
- Lines: 70
- Nntp-Posting-Host: g3.ius.cs.cmu.edu
-
-
- Folks,
-
- I am looking for high density board stacking connectors.
- All of my boards will be identical and be about 2.5 inches
- square. The idea is to pass the control, data, and address
- busses from one board to the next, indefinitely (at least
- from a mechanical standpoint). Two possible ways of doing
- this are:
-
- 1. Using through-hole technology, where the pins from the
- receptacle on the top of the board go through the holes
- in the board and are soldered to the bottom; the pins
- continue and are used to mate with the receptacle on the
- top of the next board. And so on. Kind of like the
- picture below (Side View).
-
- _____
- ____BOARD______________|___|_<-- HEADER
- | |
- | | <-- PINS
- _____
- _______________________|___|_
- | |
- | |
-
- 2. Doing a similar thing, but with surface mount where an
- SMT receptacle is on the top, and an SMT header on the
- bottom, and connections are made through the board using
- vias.
-
- ______
- ________________|____|_
- |__|
- ______
- ________________|____|_
- |__|
-
- The problem with the first method is that I need two rows of
- 40 pins/row. Since the connector has to be less than 2.5 inches
- wide, I need .050" pins and I haven't seen anything designed to
- be stacked like this with .050" centers.
-
- The problem with the second is that I need twice as many connectors,
- and allignment problems may crop up. I found some parts from
- Samtec that I could use, but they don't provide enough space between
- boards.
-
- So, if anyone knows of a connector I can use, or a company that I
- could call to get a catalog, I would appreciate hearing from you.
- Or, if you have a better idea altogether of how to stack these I would
- like to hear it. It doesn't matter whether you post to this group, or
- mail me at randy@cmu.edu
-
- I already have catalogs from:
-
- Samtec
- Aries
- Mil-Max Preci Dip
- Hirose
- Robinson Nugent
- Hypertronics
-
-
- Thanks in advance,
- Randy Casciola
- Research Engineer
- The Robotics Institute
- Carnegie Mellon
- Pittsburgh, Pa 15213
-