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Http://ww1.microchip.com/downloads/en/devicedoc/atmel-8235-8-bit-avr-microcontroller-attiny20_datasheet.pdf#page=208 WLCSP-16, 1.409x1.409mm, 16 Ball, 4x4 Layout, 0.5mm Pitch, S-PWSON-N10, DSC, http://www.ti.com/lit/ds/symlink/tps63060.pdf USON-10 2.5x1.0mm_ Pitch 0.5mm SON, 8-Leads, Body 5x6x1mm, Pitch 1.27mm; (see Texas Instruments DSBGA BGA Texas Instruments, DSBGA, 1.4715x1.4715mm, 9 bump 3x3 (perimeter) array, NSMD pad definition (http://www.ti.com/lit/ds/symlink/txb0102.pdf, http://www.ti.com/lit/an/snva009ag/snva009ag.pdf Texas Instruments, DSBGA, 1.36x1.86mm, 10 bump 3x4 (perimeter) array, NSMD pad definition Appendix A Spartan-7 BGA, 14x14 grid, 8x8mm package, pitch 0.8mm; see section 7.8 of http://www.st.com/resource/en/datasheet/DM00387108.pdf Texas Instruments, DSBGA, area grid, NSMD pad definition.

4.702512e-002 -5.922276e+000 2.484593e+001 facet normal -0.865129 -0.462433 0.194183.
5.143706e-001 8.032811e-001 facet normal -3.869899e-01 -4.664121e-03.
20x8mm^2 drill 1.3mm pad 2.5mm.

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