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0.4mm; 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, https://www.st.com/resource/en/datasheet/stm32wb55vc.pdf ST WLCSP-100, off-center ball grid, ST die ID 472, 4.36x4.07mm, 81 Ball, 9x9 Layout, 0.4mm Pitch, https://www.st.com/resource/en/datasheet/stm32g491re.pdf ST WLCSP-81, ST die ID 464, 2.58x3.07mm, 36 Ball, 6x6 Layout, 0.4mm Pitch, https://assets.nexperia.com/documents/data-sheet/PCMFXUSB3S_SER.pdf ST WLCSP-18, ST Die ID 466, 1.86x2.14mm, 18 Ball, X-staggered 13x8 Layout, 0.4mm Pitch, https://pdfserv.maximintegrated.com/package_dwgs/21-100489.PDF WLCSP-25, 5x5 raster, 2.097x2.493mm package, pitch 0.35mm; https://datasheets.maximintegrated.com/en/ds/MAX40200.pdf WLP-9, 1.448x1.468mm, 9 Ball, 3x3 Layout, 0.4mm Pitch, YFF0006, NSMD pad definition Appendix A BGA 238 0.5 CPG238 Spartan-7 BGA, 14x14 grid, 15x15mm package, 1mm pitch; https://www.xilinx.com/support/documentation/user_guides/ug475_7Series_Pkg_Pinout.pdf#page=276, NSMD pad definition (http://www.ti.com/lit/ml/mpbg674/mpbg674.pdf, http://www.ti.com/lit/wp/ssyz015b/ssyz015b.pdf UCBGA-36, 6x6 raster, 2.5x2.5mm package, pitch 0.65mm UFBGA-32, 6x6, 4x4mm.

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