Adam:

That's a good question, the only things I could find were:

Resistors, Chip.......RESC + Body Length + Body Width X Height

All dimensions are in Metric Units
All Lead Span and Height numbers go two places past the decimal point 
and "include" trailing Zeros
All Lead Span and Body Sizes go two place before the decimal point 
and "remove" leading Zeros
All Chip Component Body Sizes are one place to each side of the decimal point
Pitch Values are two places to the right & left of decimal point with 
no leading Zeros but include trailing zeros

If height numbers go 2 places to the right, and units are 
millimeters, then I would think that 70N is correct, as that would be 
.70 (2 places past the decimal point) for 0.7mm height.  However the 
150N does not fall into that category, if it did then you would have 
to drop the last 0 and it would be .15mm.

IPC needs to re-word this somehow.


At 08:16 AM 9/27/2007, you wrote:
>
>Hi,
>
>I'm working on creating a new IPC-7351 compliant footprint library and I
>have been finding some conflicting information. I have been using two
>different footprint calculators and I discovered that the calculators name
>the same footprints differently with regards to height. For example; a
>capacitor with a height of 0.7mm is named "RESC4532X70N" by one calculator
>and named "RESC4532X07N" by the other. And a capacitor with a height of
>1.5mm would be named "RESC4532X150N" by one calculator would be named
>"RESC4532X15N" by the other. Which one is correct? I can't seem to find it
>in the standard.
>
>Thanks,
>Adam
>
>---------------------------------------------------------------------------------
>DesignerCouncil Mail List provided as a free service by IPC using 
>LISTSERV 1.8d
>To unsubscribe, send a message to [log in to unmask] with following text in
>the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
>To temporarily stop/(restart) delivery of DesignerCouncil send: SET 
>DesignerCouncil NOMAIL/(MAIL)
>Search previous postings at: www.ipc.org > On-Line Resources & 
>Databases > E-mail Archives
>Please visit IPC web site 
>http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional 
>information, or contact Keach Sasamori at [log in to unmask] or 
>847-615-7100 ext.2815
>---------------------------------------------------------------------------------

---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL)
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
---------------------------------------------------------------------------------