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3x3 array, NSMD pad definition Appendix A BGA 256 1 FT256 FTG256 Spartan-7 BGA, 26x26 grid, 27x27mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=292, https://www.xilinx.com/support/documentation/user_guides/ug865-Zynq-7000-Pkg-Pinout.pdf#page=88, NSMD pad definition Appendix A BGA 484 0.8 RS484 Artix-7 BGA, 19x19 grid, 10x10mm package, 0.5mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=260, NSMD pad definition Appendix A Spartan-7 BGA, 14x14 grid, 15x15mm package, 0.8mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug865-Zynq-7000-Pkg-Pinout.pdf#page=78, NSMD pad definition (http://www.ti.com/lit/ds/symlink/lm4990.pdf, http://www.ti.com/lit/an/snva009ag/snva009ag.pdf Texas Instruments, DSBGA, 1.36x1.86mm, 10 bump 3x4 (perimeter) array, NSMD pad definition (http://www.ti.com/lit/ml/mxbg270/mxbg270.pdf Texas Instruments, DSBGA-6, 0.704x1.054mm, NSMD, YKA pad definition, 0.95x1.488mm, 6 Ball, 2x3 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 https://www.nxp.com/docs/en/application-note/AN10343.pdff Fairchild-specific MicroPak-6 1.0x1.45mm Pitch 0.5mm SON, 8-Leads, Body 5x6x1mm, Pitch 1.27mm; (see Texas Instruments BGA-289, 0.4mm pad, based on ** https://www.instructables.com/Another-MIDI-to-CV-Box-/ yet another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another version Alternative: CV from something else VCF MK's Diode Ladder VCF Kassutronic's KS-20 VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules Latest commits for file caixa_sr2.png Fix sr2 blue 4675f71e05fc19d3608ee6e5061bbe79ae432fb7 c4e1c30b9b Add jlc constraints DRC; replace order number text Things best left to external modules: - CV-controlled CV offset module - add a global/master pitch control/modulation function with.

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