GMM-7550 USB3 Adapter
About the GMM-7550 USB3 Adapter PCB
GMM-7550 USB3 Adapter is an open source RP2040/RP2350 PCB design by GMM-7550, published on GitHub. It is a 4-layer board measuring 75 × 50 mm, with 198 components from 58 distinct parts.
Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the ECMF4-40A100N10, ECMF02-2AMX6, AP7330D, TUSB542 and SN65LVDS4RSER. By type, the board carries 90 resistors, 54 capacitors, 21 ICs, 16 diodes, 6 connectors and 6 switches.
From the project
CologneChip GateMate FPGA Module: GMM-7550
USB 3 adapter board is out of production, RP2040 firmware is running, and basic functionality is tested -- no hardware issues discovered.
USB 3 adapter board is ready for production after the schematic changes and layout. KiCad 3D render of the board:
An experimental USB 3 Adapter board schematic is ready for layout:
The project repositories are moved to a dedicated account. Please, update your references to to follow further development.
Main components on the GMM-7550 USB3 Adapter
GMM-7550 USB3 Adapter bill of materials (BOM)
198 components, 58 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | ECMF4-40A100N10 | UQFN10L_1P4X2P25X0P4_STM | U1, U2 |
| 2 | ECMF02-2AMX6 | ST_UQFN-6L_1.5x1.7mm_P0.5mm | U3, U15 |
| 3 | AP7330D | SOT-23-5 | U4, U12, U13 |
| 1 | TUSB542 | Texas_X2QFN-18-1EP_2x2.4mm_P0.4mm_EP1x1.4mm_ThermalVias | U5 |
| 1 | SN65LVDS4RSER | RSE10 | U6 |
| 1 | USB3340 | QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm_ThermalVias | U7 |
| 1 | STUSB03E | QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm | U8 |
| 1 | SIP32510 SiP32510 | SOT-23-6 | U9 |
| 1 | SN74LVC1G07DBV | SOT-23-5 | U10 |
| 1 | INA180A2 | SOT-23-5 | U11 |
| 1 | MX25R1635FZUIH0 | Winbond_USON-8-1EP_3x2mm_P0.5mm_EP0.2x1.6mm | U14 |
| 1 | LM4040A30IDBZ | SOT-23 | U16 |
| 1 | RP2040 | QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U17 |
| 1 | FUSB303BTMX | OnSemi_X2QFN-12_1.6x1.6mm | U18 |
| 1 | SIP32508DT SiP32508DT | TSOT-23-6 | U19 |
| 1 | LM66200DRLR | SOT-5X3_DRL_TEX | U20 |
| 1 | SN74LVC1G06DBV | SOT-23-5 | U21 |
| 4 | NX6008NBK | SOT-23 | Q1, Q2, Q3, Q4 |
| 1 | 445I23D12M00000 | Crystal_SMD_5032-2Pin_5.0x3.2mm | Y1 |
| 1 | USB_C_Receptacle | USB_C_Receptacle_Molex_105450-0101 | J1 |
Show 38 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | USB_C_RECEPTACLE_USB2.0 USB_C_Receptacle_USB2.0 | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J2 |
| 1 | SWD | JST_SH_SM03B-SRSS-TB_1x03-1MP_P1.00mm_Horizontal | J3 |
| 2 | 10144517-061802LF | 10144517-061802LF | J4, J5 |
| 1 | DNI | Molex_Micro-Fit_3.0_43045-0200_2x01_P3.00mm_Horizontal | J6 |
| 5 | SW_Push | SW_SPST_PTS810 | SW1, SW2, SW3, SW4, SW5 |
| 1 | SW_DIP_X02 SW_DIP_x02 | SW_DIP_SPSTx02_Slide_Omron_A6H-2101_W6.15mm_P1.27mm | SW6 |
| 3 | CEZ6V2 | D_SOD-523 | D1, D11, D14 |
| 1 | ESD752DCKR | SOT-SC70_DCK_TEX | D2 |
| 9 | 150060VS55040 | LED_0603_1608Metric | D3, D4, D7, D8, D9, D10, D12, D13 +1 |
| 2 | HSMA-C197 | LED_0603_1608Metric | D5, D15 |
| 1 | HSMC-C197 | LED_0603_1608Metric | D6 |
| 27 | 0.1UF 0.1uF | C_0402_1005Metric | C1, C4, C5, C6, C7, C8, C9, C10 +19 |
| 9 | 1.0UF 1.0uF | C_0402_1005Metric | C2, C3, C13, C17, C18, C44, C48, C49 +1 |
| 4 | 0.01UF 0.01uF | C_0402_1005Metric | C11, C23, C45, C56 |
| 7 | 2.2UF 2.2uF | C_0603_1608Metric | C19, C20, C27, C28, C29, C30, C31 |
| 1 | DNI | C_0402_1005Metric | C24 |
| 1 | 47uF, 16V | CP_EIA-6032-28_Kemet-C | C25 |
| 2 | 27PF 27pF | C_0402_1005Metric | C42, C43 |
| 3 | 10UF 10uF | C_0805_2012Metric | C50, C51, C52 |
| 14 | DNI | R_0402_1005Metric | R1, R2, R5, R6, R7, R8, R9, R10 +6 |
| 23 | 10K 10k | R_0402_1005Metric | R3, R13, R20, R21, R23, R26, R29, R31 +15 |
| 2 | 8.06K 8.06k | R_0402_1005Metric | R4, R24 |
| 4 | 5.1K 5.1k | R_0402_1005Metric | R14, R16, R57, R58 |
| 6 | 100 | R_0402_1005Metric | R15, R36, R40, R62, R63, R83 |
| 4 | 27.4 | R_0402_1005Metric | R17, R28, R60, R61 |
| 4 | 15 | R_0402_1005Metric | R18, R19, R89, R90 |
| 3 | 0 | R_0402_1005Metric | R22, R66, R80 |
| 12 | 1k | R_0402_1005Metric | R25, R27, R44, R45, R52, R53, R59, R64 +4 |
| 8 | 75 | R_0402_1005Metric | R30, R33, R41, R46, R47, R48, R49, R68 |
| 1 | PE0805FRE470R02Z 0.02 | R_0805_2012Metric | R37 |
| 1 | 120K 120k | R_0402_1005Metric | R38 |
| 1 | 100K 100k | R_0402_1005Metric | R39 |
| 1 | 900K 900k | R_0402_1005Metric | R81 |
| 2 | 301 | R_0402_1005Metric | R82, R84 |
| 1 | 6.19K 6.19k | R_0402_1005Metric | R85 |
| 1 | 2k | R_0402_1005Metric | R86 |
| 1 | 3.57K 3.57k | R_0402_1005Metric | R87 |
| 1 | 1.69K 1.69k | R_0402_1005Metric | R88 |
GMM-7550 USB3 Adapter design files
The KiCad project lives in the GMM-7550/gmm7550-hardware repository on GitHub; these links point at the commit this page was built from.
GMM-7550 USB3 Adapter: common questions
What microcontroller does the GMM-7550 USB3 Adapter use?
The GMM-7550 USB3 Adapter is built around the RP2040, from the RP2040/RP2350 family.
How big is the GMM-7550 USB3 Adapter PCB?
The GMM-7550 USB3 Adapter measures 75 × 50 mm, has 4 copper layers and is 1.64 mm thick.
How many components are on the GMM-7550 USB3 Adapter?
198 components, from 58 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the GMM-7550 USB3 Adapter design files?
From the GMM-7550/gmm7550-hardware repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the GMM-7550 USB3 Adapter design in my own project?
The repository has no license, so all rights stay with GMM-7550. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the GMM-7550 USB3 Adapter without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.
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