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23.9mm, 2mm height above PCB, https://www.keyelco.com/userAssets/file/M65p4.pdf Keystone type 105 battery holder for CR1216/1220/1225, https://linxtechnologies.com/wp/wp-content/uploads/bat-hld-012-smt.pdf battery holder Keystone type 3008 coin cell vertical Panasonic CR-2450/VAN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D492.PDF battery CR-2450 coin cell cr1216 cr1220 cr1225 1xPP3 (9V) battery holder, Keystone P/N 2462, https://www.keyelco.com/product-pdf.cfm?p=1027 1xAAA Battery Holder, BX0036, Battery Type 3xAAA Keystone Battery Holder 18650 Battery Holder BA9VPC 9V 2xAA cell battery CR-1025 coin cell vertical Panasonic CR-2032/VS1N battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D348.PDF battery CR-2032 coin cell retainer SMT battery holder coin cell vertical Cherry MX keyswitch 2.00u plate Cherry MX keyswitch 2.25u plate Cherry MX keyswitch ISO enter 4-bit rotary coded switch, gull wing, Gray code, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf SMD SMT ceramic resonator filter filter hand-soldering SMD Crystal MicroCrystal CC8V-T1A/CM8V-T1A series https://www.microcrystal.com/fileadmin/Media/Products/32kHz/Datasheet/CC8V-T1A.pdf, 2.0x1.2mm^2 package SMD Crystal Oscillator Seiko Epson MC-406 https://support.epson.biz/td/api/doc_check.php?dl=brief_MC-306_en.pdf, 9.6x4.1mm^2 package SMD Crystal Oscillator IDT https://www.idt.com/document/dst/xu-family-datasheet#page=15, 5.0x3.2mm SMD Crystal Seiko Epson SG-8002JC https://support.epson.biz/td/api/doc_check.php?mode=dl⟨=en&Parts=SG-8002DC, hand-soldering, 7.0x5.0mm^2 package Miniature Crystal Clock Oscillator TXCO Fordahl DFA S2-KS/LS/US, http://www.iqdfrequencyproducts.com/products/details/iqxo-70-11-30.pdf, 7.3x5.1mm^2 package Mminiature Crystal Clock Oscillator Abracon ASE series, http://www.abracon.com/Oscillators/ASEseries.pdf, 3.2x2.5mm^2 package crystal Epson Toyocom FA-238 series http://www.mouser.com/ds/2/137/1721499-465440.pdf, hand-soldering, 3.2x2.5mm^2 package SMD Watch Crystal FrontierElectronics FM206 6.0mm length 1.9mm diameter http://www.chinafronter.com/wp-content/uploads/2013/12/FM206.pdf SMD Crystal Abracon ABM7, https://abracon.com/Resonators/abm7.pdf Abracon Miniature Ceramic Smd Crystal ABM8AIG https://abracon.com/AIGcrystals/ABM8AIG.pdf, 3.2x2.5mm^2 package SMD SMT mems oscillator Analog BGA-49, 6.25x6.25mm, 49 Ball, 7x7 Layout, 0.8mm Pitch, https://www.micron.com/-/media/client/global/documents/products/data-sheet/dram/ddr3/4gb_ddr3l.pdf#page=26 ST uTFBGA-36, 0.25mm pad, 3.6x3.6mm, 36 Ball, 6x6 Layout, 0.4mm Pitch, https://pdfserv.maximintegrated.com/package_dwgs/21-100302.PDF, https://pdfserv.maximintegrated.com/package_dwgs/21-100302.PDF NXP VFBGA-42, 3.0x2.6mm, 42 Ball, 6x7 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://www.nxp.com/docs/en/package-information/SOT1963-1.pdf ST LFBGA-354, 16.0x16.0mm, 354 Ball, 19x19 Layout, 0.8mm Pitch, https://www.micron.com/-/media/client/global/documents/products/data-sheet/dram/ddr3/4gb_ddr3l.pdf#page=23 FBGA-96, 13.5x7.5mm, 96 Ball, 9x16 Layout, 0.8mm Pitch, https://www.st.com/resource/en/datasheet/stm32mp151a.pdf ST LFBGA-448, 18.0x18.0mm, 448 Ball, 22x22 Layout, 0.8mm Pitch, https://www.infineon.com/cms/en/product/packages/PG-LFBGA/PG-LFBGA-292-11/ LFBGA-100, 10x10 raster, 10x10mm package, pitch 0.4mm; see section 7.1 of http://www.st.com/resource/en/datasheet/stm32f401vc.pdf WLCSP-49, 7x7 raster, 3.417x3.151mm package, pitch 0.4mm; see section 7.4 of http://www.st.com/resource/en/datasheet/stm32f091vb.pdf WLCSP-64, 8x8 raster, 3.347x3.585mm package, pitch 0.8mm; https://www.nxp.com/docs/en/package-information/SOT1529-1.pdf Altera BGA-672 F672 FBGA WLP-15, 3x5 raster, 2.28x3.092mm package, pitch 0.4mm; see section 6.3 of http://www.st.com/resource/en/datasheet/stm32f746zg.pdf WLCSP-144, 12x12 raster, 7x7mm package, pitch 0.4mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32f446ze.pdf UFBGA-169, 13x13 raster, 7x7mm package, pitch 0.5mm; see section 7.5 of http://www.st.com/resource/en/datasheet/stm32l152zc.pdf WLCSP-64, 8x8 raster, 5x5mm package, pitch 0.8mm TFBGA-121, 11x11 raster, 10x10mm package, pitch 0.65mm VFBGA-86, 6.0x6.0mm, 86 Ball, 10x10 Layout, 0.4mm Pitch, https://www.st.com/resource/en/datasheet/stm32g031y8.pdf ST WLCSP-20, ST die ID 461, 4.63x4.15mm, 115 Ball, Y-staggered.

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