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Pin 1 definition Vs Tape&Reel format

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Nightwish View Drop Down
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    Posted: 16 May 2013 at 10:39pm

These days I created a cell for a connector and the Pin 1 is set on lowwer left while our DFME set the pin 1 on top in his VPL library. I am not sure if IPC has this kind of definition on how to define pin 1 according to component package in tape&reel? Picture below shows the snap shot of the tape&reel format.

 
   Cell
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2013 at 6:21am
The PCB Footprint Expert (FPX) allows you to output every library part in any rotation you want.
 
On Monday, IPC will submit a Press Release to all news publications that they are now shipping FPX Lite with the purchase of the IPC-7351 Land Pattern standard.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Nightwish Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2013 at 11:05pm
Hi Tom,
 
Thanks for your reply on this. I know we can easily rotate cell when creating it but I want to know if the zero rotation of land pattern has something to do with the package type in tape & reel. In Footprint Expert the default Orientation Pin 1 for TO part is down and for SOP it is left, is this an IPC standard?
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2013 at 6:48am
There is a standard that you can search for EIA-481-D-2008m however the biggest problem is that only a small number of component manufacturer's use it. IPC and PCB Libraries, Inc. did research on this for the IPC-7351A and discovered that even the same component manufacturer breaks the Zero Component Orientation rules. So IPC established their own Zero Component Orientation (ZCO) for Footprint library parts. Then is 2007 IEC released their own Zero Component Orientation which was rotated 90 degrees from IPC. I explain EIA, IPC and IEC ZCO in this presentation - PCB Design Optimization Starts in the CAD Library available here - http://www.pcblibraries.com/forum/pcb-design-optimization-starts-in-the-cad-library_topic468.html
 
EIA-481-D - 8 mm THROUGH 200 mm EMBOSSED CARRIER TAPING AND 8 mm & 12 mm PUNCHED CARRIER TAPING OF SURFACE MOUNT COMPONENTS FOR AUTOMATIC HANDLING.
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