vs10xx package

[vito1989]

hi support,
i have some questions about the package of vs10xx,those questions were marked as following picture,please tell me what is the meaning,thanks!!!

package

U1]U5%L20ACZ)G@HDDDIPG1.jpg (133.47 KiB) Viewed 2577 times

[Panu]

Note that N=48 for VS10xx LQFP48 package. You're looking at the column where N=32 (LQFP32).
D is defined in the previous page, it's distance from pin tip to pin tip across package. You have marked 8.8/.346 in MIN, meaning the minimum distance from pin tip to pin tip across package is 8.8 millimeters or 0.346 inches. For PCB design, always use the NOM (nominal) measures.

Further down you have circled "e = 0.8 / .031" but this is the wrong column. For N=48, see "e = 0.5 / .020" meaning that the pins are at 0.5 mm / 0.020 inch spacing. This is a controlling dimension, so there is no min/nom/max for this one.

So the numbers (picked from the NOMinal column for LQFP-48) mean: pin spacing is 0.5 millimeters and the chip width including pins is 9 millimeters.

lqfpdim.png (60.4 KiB) Viewed 2572 times

-Panu

[adria_toa]

Hello,

Where I can get this package dimension document ?
I can't find this document at vlsi site.
Thank you

[Hannu]

Support -> documents and scroll down to Mechanical drawings.

Straight URL: https://www.vlsi.fi/en/support/download.html
And the LQFP48 drawing: https://www.vlsi.fi/fileadmin/quality/L ... _rev_M.pdf
with the same chart, non applicable columns blurred.

[adria_toa]

Support -> documents and scroll down to Mechanical drawings.

Straight URL: https://www.vlsi.fi/en/support/download.html
And the LQFP48 drawing: https://www.vlsi.fi/fileadmin/quality/L ... _rev_M.pdf
with the same chart, non applicable columns blurred.

Thank's man you're a life saver