8 layers127 × 57.8 mm
8 layers127 × 75 mm
Slot1-c2mu
alphaonex86/FPGA-CPUFPGA CPU x86 real socket
- Size
- 127 × 75 mm
- Copper layers
- 8
- Thickness
- 1.6 mm
- Parts
- 313
- Nets
- 812
- Pads
- 2,414
- Tracks, vias
- 9,134, 1,644
- Pours
- 13
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 18 Oct 2026
- Updated
- 7 Nov 2026
Overview
Slot1-c2mu is an open-source printed circuit board by alphaonex86, from the alphaonex86/FPGA-CPU repository on GitHub, published under the GPL-3.0 licence. It is an 8-layer board of 127 × 75 mm with 313 parts on 812 nets, routed with 9,134 tracks and 1,644 vias.
It is built around the CY2309SC-1, FT232HL-REEL and W25Q128JVSIQ, with the TPS62130RGT, TPS54620RHLR and SN74GTL16612DL among its other parts. Its parts include 174 capacitors, 61 resistors, 17 ICs, 7 connectors and 4 inductors. It belongs with the FPGA and CPLD boards of this library.
Main components
9
CY2309SC-1
SOIC-160℃~+70℃ 133.33MHz 3V~3.6V Built-in phase-locked loop、Multi-channel fan-out/isolation drive、Output enable/shutdown SOIC-16 Clock Buffers, Drivers, DistributorsInfineon TechnologiesPre-Ordered Products
FT232HL-REEL
LQFP-48(7x7)-40℃~+85℃ 1 1.62V~1.98V、2.97V~3.63V 480Mbps USB 2.0 USB to UART、USB to FIFO LQFP-48(7x7) USB Converters ROHSFTDIUSB Converters
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
TPS62130RGT
VQFN-16-EP(3x3)-40℃~+85℃@(TA) 1 17uA 2.5MHz 3A 3V~17V 900mV~6V Adjustable Buck Buck Built-in Yes QFN-16-EP(3x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TPS54620RHLR
VQFN-14-EP(3.5x3.5)-40℃~+150℃@(TJ) 1 1.6MHz 4.5V~17V 6A 800mV~15V Adjustable Buck Buck Built-in Yes VQFN-14-EP(3.5x3.5) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
SN74GTL16612DL
SSOP-56-300mil-40℃~+85℃ 0.3ns 1.3ns 18 2.8ns 32mA 64mA D Latch GTL16612 Tri-State SSOP-56-300mil Latches ROHSTexas InstrumentsLatches
TPS74801DRC
SON100.8V to 3.6V 1.5A Low-Dropout Linear Regulator with Programmable Soft-StartTexas InstrumentsUncategorised
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
B5819WS
SOD-323-55℃~+125℃ 1A 1mA@40V 25A 40V 900mV@3A Independent SOD-323 Schottky Diodes ROHSMDDSchottky Diodes
README
sockets/kicad/README.mdSocket models (KiCad)
ZIF-socket footprints, symbols, STEP models and pin maps copied from
FPGAmotherboard. Their
generators are only in the operator's full tree, not the public repo:
socket3/tools/gen_socket3_footprint.py @a73daf8, socket7/tools/gen_socket7_*.py
@e84b442, socket370/tools/gen_pga370_*.py @57f3c94. Socket3_Am5x86_237.step
is the one regenerated in FPGAmotherboard on 2026-10-18 (the old one predated the
measured lever).
| Socket | ZIF footprint | CPU pins / holes | Pin map (source) | Symbol | ZIF body + lever |
|---|---|---|---|---|---|
| 3 | Socket3_Am5x86_237 | 168 / 241 | am5x86_pga168.csv (AMD 19751C) | none yet | photo-scaled off the operator's MB-8433UUD-A, ±0.6 mm; top face 7.3 ±0.4 mm (photo, 2026-10-31; STEP still 8.0), hole depth 5 mm (caliper) |
| 7 | Socket7_P55C_296 | 296 / 320 | socket7_p55c.csv (Intel 243185-004) | CPU_Intel_Socket7 | assumed (PGA370 envelope), not measured |
| 370 | PGA370_Socket_ZIF | 370 / 370 | pga370_coppermine.csv (Intel 245264-008) | CPU_Intel_PGA370 | Intel 244410-002 Fig. 1/2a |
Interposer base
python3 tools/gen_base.py builds, per socket, the interposer's CPU-side pins:
a Mill-Max PGA header soldered under the board (catalog in
../parts/mill-max_catalog_metric.pdf, p.140 pins, p.137 insulator).
| Socket | Footprint | 3D model (built, not in git) | Check board (base on the ZIF) | Header | Drill / pad | Board above socket |
|---|---|---|---|---|---|---|
| 3 | Interposer.pretty/Socket3_Base_PGA168 | 3dmodels/Socket3_Base_PGA168.step | socket3-base-check.kicad_pcb | 551, pin #5503 | 0.90 / 1.50 mm | 6.40 mm |
| 7 | Interposer.pretty/Socket7_Base_PGA296 | 3dmodels/Socket7_Base_PGA296.step | socket7-base-check.kicad_pcb | 550, pin #5012 | 0.80 / 1.25 mm | 3.99 mm |
| 370 | Interposer.pretty/Socket370_Base_PGA370 | 3dmodels/Socket370_Base_PGA370.step | socket370-base-check.kicad_pcb | 550, pin #5012 | 0.80 / 1.25 mm | 3.99 mm |
- Pin positions come from the ZIF footprints (socket top view = interposer top view), so the base goes unmirrored on the interposer's F.Cu; the generator fails unless they match the pin map exactly.
- Male pin 0.48 x 3.91 mm (CPU: 0.43-0.51 x 3.05-3.30 mm); tails stand 1.6 mm (551) / 2.57 mm (550) above a 1.6 mm board. F.CrtYd is the tail ring, B.CrtYd the header insulator; F.Fab shows the original CPU package.
- Footprints load their 3D models from
${KIPRJMOD}/3dmodels/; the check boards live here so that resolves. - Not measured yet (see
plan/interposers.mdM1-M3): Socket 3/7 ZIF height (the STEPs use 8.0 mm), free space around each socket, header seating depth.
Parts
313| Qty | Value | Footprint | References |
|---|---|---|---|
| 54 | 100nF | C_0402_1005Metric | C100, C101, C102, C103, C104, C105, C106, C107, C108, C109, C110, C111, C112, C113, C114, C115 +38 |
| 35 | 56R | R_Array_Convex_4x0402 | RN1, RN2, RN10, RN11, RN12, RN13, RN14, RN15, RN16, RN17, RN18, RN19, RN20, RN21, RN22, RN23 +19 |
| 23 | 4.7uF | C_0603_1608Metric | C66, C67, C68, C69, C70, C71, C74, C75, C76, C77, C78, C83, C84, C85, C140, C143 +7 |
| 22 | 470nF | C_0402_P1.00 | C22, C23, C24, C25, C26, C27, C28, C29, C30, C31, C32, C33, C34, C35, C36, C37 +6 |
| 16 | 220nF | C_0402_1005Metric | C153, C154, C155, C156, C157, C158, C159, C160, C161, C162, C163, C164, C165, C166, C167, C168 |
| 11 | 100nF | C_0402_P1.00 | C53, C54, C55, C56, C57, C58, C59, C60, C61, C62, C63 |
| 11 | 10k | R_0402_1005Metric | R4, R25, R26, R27, R28, R29, R44, R45, R47, R56, R57 |
| 9 | 100k | R_0402_1005Metric | R2, R5, R7, R8, R10, R11, R13, R48, R49 |
| 9 | 470nF | C_0402_1005Metric | C39, C40, C46, C47, C48, C49, C50, C51, C52 |
| 8 | 22R | R_0402_1005Metric | R30, R31, R32, R33, R34, R35, R36, R37 |
| 7 | SN74GTL16612 | TSSOP-56_6.1x14mm_P0.5mm | U3, U4, U5, U6, U7, U8, U9 |
| 6 | 47uF/6.3V | C_1210_3225Metric | C72, C73, C79, C80, C81, C82 |
| 5 | 10uF/25V | C_1210_3225Metric | C2, C3, C10, C14, C18 |
| 5 | 4.7k | R_0402_1005Metric | R38, R39, R42, R46, R52 |
| 4 | 0R | R_0402_1005Metric | R21, R22, R23, R24 |
| 4 | 1uF | C_0402_1005Metric | C125, C126, C129, C130 |
| 4 | 33R | R_0402_1005Metric | R58, R59, R60, R61 |
| 3 | 1k | R_0402_1005Metric | R20, R41, R53 |
| 3 | 2.2uH XFL4020-222 | L_Coilcraft_XxL4020 | L2, L3, L4 |
| 3 | 22uF/6.3V | C_0805_2012Metric | C11, C15, C19 |
| 3 | 3.3nF | C_0402_1005Metric | C13, C17, C21 |
| 3 | TPS62130RGT | VQFN-16-1EP_3x3mm_P0.5mm_EP1.68x1.68mm | PS2, PS3, PS4 |
| 2 | 100uF/6.3V | C_1210_3225Metric | C64, C65 |
| 2 | 1nF | C_0402_1005Metric | C128, C132 |
| 2 | 2.2uF | C_0402_1005Metric | C127, C131 |
| 2 | 22uF | C_0805_2012Metric | C144, C145 |
| 2 | 22uF/10V | C_1206_3216Metric | C5, C6 |
| 2 | 27pF | C_0402_1005Metric | C173, C174 |
| 2 | 2N7002 | SOT-23 | Q1, Q2 |
| 2 | 330R | R_0402_1005Metric | R40, R54 |
| 2 | MountingHole_Pad | Standoff_SMT_M2_D5.56_H6.6 | H1, H2 |
| 2 | TPS74801 | VSON-10-1EP_3x3mm_P0.5mm_EP1.65x2.4mm | U13, U14 |
| 2 | USBLC6-2SC6 | SOT-23-6 | U15, U17 |
| 1 | 1.00k | R_0402_1005Metric | R18 |
| 1 | 1.13k 1% | R_0402_1005Metric | R14 |
| 1 | 1.1A | Fuse_1206_3216Metric | F2 |
| 1 | 1.33k | R_0402_1005Metric | R1 |
| 1 | 100R | R_0402_1005Metric | R50 |
| 1 | 100R 1% | R_0402_1005Metric | R43 |
| 1 | 100uF/25V | CP_Elec_6.3x5.4 | C1 |
| 1 | 10nF | C_0402_1005Metric | C8 |
| 1 | 10pF | C_0402_1005Metric | C152 |
| 1 | 10uF | C_0805_2012Metric | C172 |
| 1 | 124k | R_0402_1005Metric | R9 |
| 1 | 12MHz | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 12k 1% | R_0402_1005Metric | R55 |
| 1 | 2.00k | R_0402_1005Metric | R19 |
| 1 | 2.49k 1% | R_0402_1005Metric | R16 |
| 1 | 21.5k | R_0402_1005Metric | R51 |
| 1 | 24.9k | R_0402_1005Metric | R6 |
| 1 | 27nF | C_0402_1005Metric | C9 |
| 1 | 316k | R_0402_1005Metric | R12 |
| 1 | 4.53k 1% | R_0402_1005Metric | R15 |
| 1 | 4.7uF/25V | C_0805_2012Metric | C4 |
| 1 | 4.99k 1% | R_0402_1005Metric | R17 |
| 1 | 50MHz | Oscillator_SMD_SeikoEpson_SG210-4Pin_2.5x2.0mm | U12 |
| 1 | 52.3k | R_0402_1005Metric | R3 |
| 1 | 5A | Fuse_1812_4532Metric | F1 |
| 1 | 6.8uH FXL1040-6R8 | L_Changjiang_FXL1040 | L1 |
| 1 | 600R@100MHz | L_0603_1608Metric | FB1 |
| 1 | B5819WS | D_SOD-323 | D2 |
| 1 | Barrel_Jack | BarrelJack_CUI_PJ-063AH_Horizontal | J3 |
| 1 | CMOS cell | Molex_PicoBlade_53261-0271_1x02-1MP_P1.25mm_Horizontal | J8 |
| 1 | CY2309 | SOIC-16_3.9x9.9mm_P1.27mm | U10 |
| 1 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J7 |
| 1 | Conn_01x04 | JST_PH_B4B-PH-K_1x04_P2.00mm_Vertical | J5 |
| 1 | Conn_02x07_Odd_Even | PinHeader_2x07_P2.00mm_Vertical | J1 |
| 1 | FPGA_Artix7_XC7A100T_FGG484 | FPGA_Artix7_XC7A100T_FGG484_BGA | U1 |
| 1 | FT232HL-REEL | LQFP-48_7x7mm_P0.5mm | U16 |
| 1 | Intel_SC242_CardEdge | SC242_CardEdge_242 | U2 |
| 1 | LattePanda_Mu_SODIMM260 | LattePanda_Mu_LOTES_ADDR0110_9.2H | J4 |
| 1 | PWR | SW_Push_1P1T_XKB_TS-1187A | SW1 |
| 1 | TPS54620RHL | TI_RHL0014A | PS1 |
| 1 | USB 2.0 x2 header | PinHeader_2x05_P2.54mm_Vertical | J6 |
| 1 | W25Q128JVSIQ | SOIC-8_5.3x5.3mm_P1.27mm | U11 |
| 1 | green | LED_0603_1608Metric | D1 |
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Questions
How big is the Slot1-c2mu PCB?
It measures 127 × 75 mm and has 8 copper layers, 1.6 mm thick.
What parts does the Slot1-c2mu use?
313 parts, built around the CY2309SC-1, FT232HL-REEL, W25Q128JVSIQ and TPS62130RGT. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Slot1-c2mu KiCad files?
From the alphaonex86/FPGA-CPU repository on GitHub, at the commit this page was made from: the board is hw/slot1-c2mu/slot1-c2mu.kicad_pcb and its schematic hw/slot1-c2cart/slot1-c2cart.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Slot1-c2mu design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).