Hello TechNetters,

I got some devices from Analog Devices, Altera, Philips etc.  with a
package called "240-pin Power Quad Flat Pack" and some others from
Xilinx "240-Pin Plastic PQFP" which meet all dimensions from
IPC-SM-782A RLP-No. 631A "SQFP 32x32-240" but the dimension L is not
34.00 mm +- 0.2 mm as in IPC-SM-782A, it is 34.60 mm +- 0.20 or 0.25
mm in reality and on the data sheets from AD, Altera, Philips and
Xilinx.

Is this a fully other (JEDEC-) package type than that one from
IPC-SM-782A?
Is something wrong in the IPC standard?
Is this the IC manufacturer's freedom not to follow standards??????

I just missed the chance to make some unsolderable prototypes,
because the customer unpacked his ALTERA and placed it on the
checkplots........

Thanx, regards
Matthias Mansfeld
-----------------------------------------------
Matthias Mansfeld Elektronik
* Printed Circuit Board Design and Assembly
Am Langhoelzl 11, D-85540 Haar, GERMANY
Phone: +49-89-4620 0937, Fax: +49-89-4620 0938
E-Mail: [log in to unmask]
Internet: http://home.t-online.de/home/matthias.mansfeld

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