1996 - 2016
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
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This matrix is based on information found on the Emulation Technology website.
To use this table, select the ball grid array size, e.g. 8x8, and then look in the column giving the number of rows of pads; e.g., 2, and the intersecting cell shows the number of balls (or pins). Referring to the drawing to the left, in this example, an 8x8 array with a 2 rows of balls has 16 balls along the top and bottom edges and 8 balls along each side, for a total of 48 balls.
|Ball Pitch Code Table (mm)|
|1 = 1.50||3 = 1.00||5 = 0.50||7= 2.50||9= 0.65|
|2 = 1.27||4 = 0.75||6 = 0.80||8= 2.54|