6 layers185 × 93 mm
Linecard
azonenberg/latentred
Open hardware 48x 1000baseT + 2x 25G SFP28 Ethernet switch
621 parts36BSD-3-Clause
10 layers151 × 111 mm
Switch engine
azonenberg/latentred36Open hardware 48x 1000baseT + 2x 25G SFP28 Ethernet switch
- Size
- 151 × 111 mm
- Copper layers
- 10
- Thickness
- 1.6 mm
- Parts
- 369
- Nets
- 681
- Pads
- 2,352
- Tracks, vias
- 5,740, 3,246
- Pours
- 163
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 9 Dec 2024
- Updated
- 9 Aug 2026
Overview
Switch engine is an open-source printed circuit board by azonenberg, from the azonenberg/latentred repository on GitHub, published under the BSD-3-Clause licence. It is a 10-layer board of 151 × 111 mm with 369 parts on 681 nets, routed with 5,740 tracks and 3,246 vias.
It is built around the MYMGK00504ERSR, MYMGK1R812ERSR-H and KSZ9031RNXCA, with the MYMGK00506ERSR, MT25QU256ABA8E12-0AUT TR and 74LVC1T45W6 among its other parts. Its parts include 159 capacitors, 93 resistors, 30 connectors, 26 ICs and 14 diodes. It belongs with the STM32 boards of this library.
Main components
12
MYMGK00504ERSR
SMD-23PSMD-23P DC-DC Power Modules ROHSMurataDC-DC Power ModulesMYMGK1R812ERSR-H
-1 12A 21.6W 700mV~1.8V 8V~15V 90.4% - Isolated Power Modules ROHSMurataIsolated Power Modules
KSZ9031RNXCA
QFN-48-EP(7x7)0℃~+70℃ 1.2V、1.8V、2.5V、3.3V 10BASE-T、100BASE-TX、1000BASE-T 10Mbit/s、100Mbit/s、1Gbit/s 4 PHY Transceiver RGMII QFN-48-EP(7x7) Ethernet Transceivers ROHSMicrochip TechnologyEthernet Transceivers
MYMGK00506ERSR
SMD,9x7.5mm-40℃~+85℃ 1 24mA 3000uF 300kHz 5mm 6A 7.5mm 700mV~5V 8V~14V 95% 9mm Short Circuit Protection、Over-temperature protection、Over Current Protection、Overvoltage protection、Under Voltage Protection、Automatic fault recovery、Programmable output voltage Step-down type ±1% SMD,9x7.5mm DC-DC Power Modules ROHSMurataDC-DC Power Modules
MT25QU256ABA8E12-0AUT TR
TPBGA-24-40℃~+125℃ 1.7V~2V 1.8ms 100,000 cycles 166MHz 20 Years 256Mbit Hardware Write Protection、Software Write Protection、Write enable latch、Absolute Write Protection SPI TPBGA-24(6x8) NOR FLASH ROHSMicron TechNOR FLASH
74LVC1T45W6
SOT-26-40℃~+125℃ 1 1 1.65V~5.5V 1.65V~5.5V Bidirectional Power-Off Protection Tri-State SOT-26 Translators, Level Shifters ROHSDiodes IncorporatedTranslators, Level ShiftersSIT9121AI-2BF-XXS156.250000G
SMD3225-6P-40℃~+85℃ 156.25MHz 2.5V~3.3V 55mA LVDS ±10ppm SMD3225-6P Programmable Oscillators ROHSSiTimeProgrammable Oscillators
ECS-1612MV-250-CN-TR
SMD1612-4P-40℃~+85℃ 1.6V~3.63V 25MHz 5mA CMOS ±25ppm SMD1612-4P Crystal Oscillators ROHSECSCrystal Oscillators
ESD224DQAR
USON-10(1x2.5)-40℃~+125℃ 0.5pF 100pA 14V 17W@8/20us 2A@8/20us 3.6V 7.9V Bidirectional ESD Four channels IEC 61000-4-2 USON-10(1x2.5) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD Protection Devices
ADP1740ACPZ-1.8-R7
LFCSP-16(4x4)-40℃~+125℃@(Tj) 1 1.8V 160mV@(2A) 2A 3.6V 65dB@(1kHz) 90uA Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown、Enable control、Input under-voltage protection、Operating status indication、Reverse-polarity current protection、Adjustable soft-start Positive LFCSP-16(4x4) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAnalog DevicesVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsADP1740ACPZ-2.5-R7
LFCSP-16(4x4)-40℃~+125℃@(Tj) 1 160mV@(2A) 2.5V 2A 3.6V 400uA 65dB 65uVrms Fixed PG Pin、Over Current Protection、Over Temperature Protection、Soft Start、Enable Positive LFCSP-16(4x4) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAnalog DevicesVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
AT24MAC402-XHM
TSSOP81.7V to 5.5V, I2C-Compatible (2-wire) 2-Kbit (256 x 8) Serial EEPROM with a EUI-48 AddressMicrochip TechnologyUncategorised
README
README.mdlatentred
Open hardware 48x 1000baseT + 2x 25G SFP28 Ethernet switch
Originally located in azonenberg/latentpacket but moved out to avoid monorepo bloat.
High level architecture:
- IBC (x1): 48V -> 12V intermediate bus converter. Not in this repo, see https://github.com/azonenberg/common-ibc
- Line card (x2): 24 10/100/1000 baseT ports, driven by two VSC8512 12-port PHYs
- Switch engine (x1): Kintex UltraScale+ FPGA (XCKU3P or 5P in FFVB676), STM32H735 (tentatively), packet buffer SRAM, 2x 25G SFP28 uplink
Parts
369| Qty | Value | Footprint | References |
|---|---|---|---|
| 47 | 0.47 uF | azonenberg_pcb:EIA_0402_CAP_NOSILK | C103, C104, C105, C106, C107, C108, C109, C110, C111, C121, C122, C127, C128, C129, C130, C131 +31 |
| 28 | 4.7 uF | azonenberg_pcb:EIA_0603_CAP_NOSILK | C19, C36, C37, C58, C59, C112, C113, C114, C115, C116, C123, C124, C125, C126, C147, C148 +12 |
| 21 | 10K | azonenberg_pcb:EIA_0402_RES_NOSILK | R3, R4, R6, R10, R13, R23, R31, R33, R34, R36, R38, R57, R70, R84, R86, R87 +5 |
| 20 | 33 | azonenberg_pcb:EIA_0402_RES_NOSILK | R43, R44, R45, R46, R47, R48, R49, R50, R51, R52, R53, R66, R67, R74, R76, R77 +4 |
| 17 | 0.1 uF | azonenberg_pcb:EIA_0402_CAP_NOSILK | C20, C96, C117, C118, C119, C120, C141, C142, C144, C145, C150, C151, C152, C153, C156, C157 +1 |
| 16 | U.FL | azonenberg_pcb:CONN_U.FL_TE_1909763-1 | TP8, TP9, TP10, TP11, TP12, TP13, TP14, TP15, TP17, TP18, TP19, TP20, TP21, TP22, TP23, TP24 |
| 13 | 10 uF | azonenberg_pcb:EIA_0805_CAP_NOSILK | C45, C46, C47, C48, C50, C51, C57, C74, C99, C101, C102, C154, C155 |
| 11 | 1K | azonenberg_pcb:EIA_0402_RES_NOSILK | R24, R26, R27, R29, R30, R32, R35, R37, R75, R83, R92 |
| 10 | 0.47 uF | azonenberg_pcb:EIA_0201_CAP_NOSILK | C77, C82, C83, C84, C86, C89, C90, C92, C93, C94 |
| 10 | 22 uF 25V | azonenberg_pcb:EIA_1812_CAP_NOSILK | C1, C2, C3, C4, C12, C13, C14, C15, C16, C17 |
| 10 | 220 uF | azonenberg_pcb:EIA_1210_CAP_NOSILK | C6, C7, C8, C9, C10, C11, C25, C26, C29, C30 |
| 10 | 33K | azonenberg_pcb:EIA_0402_RES_NOSILK | R1, R14, R58, R59, R60, R61, R62, R63, R64, R65 |
| 10 | 4.7K | azonenberg_pcb:EIA_0402_RES_NOSILK | R15, R39, R40, R41, R42, R54, R55, R56, R72, R73 |
| 9 | 100 uF | azonenberg_pcb:EIA_1210_CAP_NOSILK | C24, C28, C31, C34, C49, C52, C53, C54, C55 |
| 9 | GREEN | azonenberg_pcb:EIA_0402_LED | D1, D7, D8, D9, D10, D11, D12, D13, D14 |
| 7 | 74LVC1T45 | azonenberg_pcb:DFN_6_0.5MM_1.6x1.6MM_TI_DPK | U10, U11, U12, U18, U19, U20, U21 |
| 6 | ARF6-08-S-D-A-K-TR | azonenberg_pcb:CONN_SAMTEC_ARF6-08-S-D-A-K-TR | J14, J15, J17, J18, J21, J22 |
| 6 | CONN_01X03 | azonenberg_pcb:CONN_HEADER_2.54MM_1x3 | J12, TP16, TP25, TP26, TP27, TP28 |
| 6 | MI0603J601R-10 | azonenberg_pcb:EIA_0603_INDUCTOR_NOSILK | FB2, FB3, FB4, FB5, FB6, FB7 |
| 5 | 0 | azonenberg_pcb:EIA_0402_RES_NOSILK | R9, R11, R12, R22, R71 |
| 5 | 47 uF | azonenberg_pcb:EIA_1210_CAP_NOSILK | C41, C42, C43, C44, C56 |
| 5 | TESTPOINT | azonenberg_pcb:TESTPOINT_SMT_0.5MM | TP1, TP2, TP3, TP4, TP5 |
| 4 | SCREWHOLE | azonenberg_pcb:MECHANICAL_CLEARANCEHOLE_4_40 | M1, M2, M3, M4 |
| 4 | SZESD7471N2T5G | azonenberg_pcb:SOD882 | D3, D4, D5, D6 |
| 3 | CONN_01X10 | azonenberg_pcb:CONN_MOLEX_PICOBLADE_10POS_0532611071 | J16, J19, J23 |
| 3 | DNP | azonenberg_pcb:EIA_0402_RES_NOSILK | R16, R25, R28 |
| 3 | SIT9121AI-2BF-XXS156.250000G | azonenberg_pcb:OSCILLATOR_LVDS_3.2x2.5 | U15, U25, U27 |
| 2 | 10 uF 25V | azonenberg_pcb:EIA_1210_CAP_NOSILK | C38, C39 |
| 2 | 470 | azonenberg_pcb:EIA_0402_RES_NOSILK | R68, R69 |
| 2 | CONN_01X03 | azonenberg_pcb:CONN_HEADER_2.54MM_1x3_REFLOW | J3, TP6 |
| 2 | CORTEX_DEBUG_ETM | azonenberg_pcb:CONN_HEADER_1.27MM_2x10_SMT_SAMTEC_FTSH-110-01-L-DV-K | J4, J10 |
| 2 | DNP | azonenberg_pcb:EIA_1210_CAP_NOSILK | C32, C33 |
| 2 | DNP | azonenberg_pcb:EIA_0402_CAP_NOSILK | C35, C146 |
| 2 | ECS-1612MV-250-CN | azonenberg_pcb:OSCILLATOR_1.6x1.2 | U14, U22 |
| 2 | ESD224DQAR | azonenberg_pcb:DFN_10_0.5MM_2.5x1MM_TI_DQA | U24, U26 |
| 2 | FAN_01 | azonenberg_pcb:CONN_MOLEX_KK_0470531000 | J5, J6 |
| 2 | MYMGK00504ERSR | azonenberg_pcb:MODULE_MURATA_MYMGK00504ERSR | U5, U6 |
| 2 | MYMGK1R812ERSR | azonenberg_pcb:MODULE_MURATA_MYMGK1R812 | U2, U3 |
| 2 | PMOD_HOST | azonenberg_pcb:CONN_HEADER_2.54MM_2x6_RA_PMOD_HOST | J9, J13 |
| 2 | SMPM | azonenberg_pcb:CONN_SMPM_AMPHENOL_C925-197J-51PT | J11, J24 |
| 2 | SWITCH | azonenberg_pcb:SWITCH_RAFI_MICON_5 | SW1, SW2 |
| 2 | TESTCLIP | azonenberg_pcb:TESTPOINT_SMT_KEYSTONE_5016 | TP7, TP29 |
| 1 | 0826-1G1T-23-F | azonenberg_pcb:CONN_BELFUSE_0826_1G1T_23_F | J20 |
| 1 | 1.2k | azonenberg_pcb:EIA_0402_RES_NOSILK | R7 |
| 1 | 100 | azonenberg_pcb:EIA_0402_RES_NOSILK | R85 |
| 1 | 12.1K 1% | azonenberg_pcb:EIA_0402_RES_NOSILK | R82 |
| 1 | 2.2 uH | azonenberg_pcb:EIA_1210_CAP_NOSILK | L1 |
| 1 | 2.2k | azonenberg_pcb:EIA_0402_RES_NOSILK | R17 |
| 1 | 20k | azonenberg_pcb:EIA_0402_RES_NOSILK | R19 |
| 1 | 22 | azonenberg_pcb:EIA_0402_RES_NOSILK | R20 |
| 1 | 22 uF | azonenberg_pcb:EIA_0805_CAP_NOSILK | C85 |
| 1 | 220 pF | azonenberg_pcb:EIA_0402_CAP_NOSILK | C100 |
| 1 | 24.9k | azonenberg_pcb:EIA_0402_RES_NOSILK | R5 |
| 1 | 25SVPF330M | azonenberg_pcb:CAP_AL_10MM_SMT | C5 |
| 1 | 300 | azonenberg_pcb:EIA_0402_RES_NOSILK | R21 |
| 1 | 330 uF | azonenberg_pcb:EIA_1210_CAP_NOSILK | C40 |
| 1 | 3A | azonenberg_pcb:EIA_0603_CAP_NOSILK | F1 |
| 1 | 4.7k | azonenberg_pcb:EIA_0402_RES_NOSILK | R18 |
| 1 | 620 | azonenberg_pcb:EIA_0402_RES_NOSILK | R8 |
| 1 | 8.06K | azonenberg_pcb:EIA_0402_RES_NOSILK | R2 |
| 1 | 960-27-23-D-AB-0 | azonenberg_pcb:HEATSINK_WAKEFIELDVETTE_960-27-12-D-AB-0 | M8 |
| 1 | ADM3101E_QFN | azonenberg_pcb:QFN_12_0.5MM_3x3MM | U29 |
| 1 | ADP1740ACPZ-1.8-R7 | azonenberg_pcb:QFN_16_0.65MM_4x4MM | U7 |
| 1 | ADP1740ACPZ-2.5-R7 | azonenberg_pcb:QFN_16_0.65MM_4x4MM | U28 |
| 1 | AT24MAC402 | azonenberg_pcb:DFN_8_0.5MM_2x3MM_TALL | U17 |
| 1 | BLM31KN271SH1L | azonenberg_pcb:EIA_1206_CAP_NOSILK | FB1 |
| 1 | CONN_IBC_MGMT | azonenberg_pcb:CONN_MOLEX_PICOBLADE_5POS_0532610571 | J2 |
| 1 | CONN_PCIE_PWR_8PIN | azonenberg_pcb:CONN_MOLEX_MINIFITJR_8POS_0039291087 | J1 |
| 1 | FAN | azonenberg_pcb:FAN_DELTA_EFB0412VHD-SP05 | M9 |
| 1 | JUMPER_0402 | azonenberg_pcb:EIA_0402_JUMPER | J7 |
| 1 | KSZ9031RN | azonenberg_pcb:QFN_48_0.5MM_7x7MM | U23 |
| 1 | LOGO | w_logo:Logo_silk_OSHW_6x6mm | M6 |
| 1 | LOGO | azonenberg_pcb:LONGTHING-1200DPI | M5 |
| 1 | LOGO | w_logo:Logo_silk_WEEE_3.4x5mm | M7 |
| 1 | MT25QU256ABA8E12-0AUT | azonenberg_pcb:BGA_24_6x8_DEPOP1_1MM | U13 |
| 1 | MYMGK00506ERSR | azonenberg_pcb:MODULE_MURATA_MYMGK00504ERSR | U4 |
| 1 | RED | azonenberg_pcb:EIA_0402_LED | D2 |
| 1 | RJ45 | azonenberg_pcb:CONN_RJ45_BELSTEWART_SS-7188S-A-PG4-1-BA-xx | J26 |
| 1 | SSM6N58NU | azonenberg_pcb:DFN_6_0.65MM_2x2MM_GDS | Q2 |
| 1 | STM32H735-UFBGA176-25 | azonenberg_pcb:BGA_201_10x10_DEPOP_0.65MM_OSHPARK | U9 |
The 366 most common of 369 parts.
Questions
How big is the Switch engine PCB?
It measures 151 × 111 mm and has 10 copper layers, 1.6 mm thick.
What parts does the Switch engine use?
369 parts, built around the MYMGK00504ERSR, MYMGK1R812ERSR-H, KSZ9031RNXCA and MYMGK00506ERSR. 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 Switch engine KiCad files?
From the azonenberg/latentred repository on GitHub, at the commit this page was made from: the board is pcb/switch-engine/switch-engine.kicad_pcb and its schematic pcb/dual-sfp28/dual-sfp28.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Switch engine design in my own project?
Its repository publishes it under the BSD-3-Clause licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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