4 layers88.1 × 59.4 mm
Chromapi motherboard v1
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Usb2uart kicad
samvangysegem/usb2uart-hardwareCH344-based USB-to-UART converter
- Size
- 41.2 × 32.6 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 49
- Nets
- 52
- Pads
- 209
- Tracks, vias
- 295, 75
- Pours
- 22
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Oct 2026
- Updated
- 5 Oct 2026
Overview
Usb2uart kicad is an open-source printed circuit board by samvangysegem, from the samvangysegem/usb2uart-hardware repository on GitHub. It is a 4-layer board of 41.2 × 32.6 mm with 49 parts on 52 nets, routed with 295 tracks and 75 vias.
It is built around the CH344Q, SPX3819M5-L-3-3/TR and TPD2E2U06QDCKRQ1, with the 0402CG150J500NT, CL21A106KAYNNNE and X32258MOB4SI among its other parts. Its parts include 12 capacitors, 12 diodes, 10 resistors, 5 connectors and 2 ICs. It belongs with the interfaces and adapters boards of this library.
Main components
9
CH344Q
LQFP-48(7x7)-40℃~+85℃ 3.3V 4 6Mbps USB to UART、USB to RS232、USB to RS422、USB to RS485 LQFP-48(7x7) USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
SPX3819M5-L-3-3/TR
SOT-23-5-40℃~+125℃ 1 16V 3.3V 340mV@(500mA) 40uVrms 500mA 70dB 90uA Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMaxLinearVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
TPD2E2U06QDCKRQ1
SC-70-3-40℃~+125℃ 1.5pF 12.4V 1nA 2 5.5A@8/20us 5.5V 75W@8/20us 8.5V ESD IEC 61000-4-2 SC-70-3 ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)
0402CG150J500NT
040215pF 50V C0G ±5% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSGuangdong Fenghua Advanced Tech (FH)Multilayer Ceramic Capacitors MLCC - SMD/SMT
CL21A106KAYNNNE
080510uF 25V X5R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
X32258MOB4SI
SMD3225-4P-40℃~+85℃ 12pF 180Ω 8MHz Crystal Oscillator ±10ppm ±20ppm SMD3225-4P Crystals ROHSYXCCrystals
KT-0603B
0603100mW 120° 175mcd 3.1V 460nm~475nm 469nm 5mA Blue Discrete Diode Water Clear 0603 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete
TPD1E10B06DPYR
X1-SON-2(0.6x1)-40℃~+125℃ 1 100nA 12pF 14V 5.5V 6A@8/20us 6V 90W@8/20us Bidirectional ESD IEC 61000-4-2 X1-SON-2(0.6x1) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)KT-0603R
0603-40℃~+85℃ 1.6mm x 0.8mm square LED 1.8V~2.4V 120° 20mA 300mcd 40mW 615nm~630nm 645nm Discrete Diode Red Water Clear 0603 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete
README
README.mdUSB2UART
USB-C to four UART ports, based on the CH344Q and designed in KiCad.
usb2uart-kicad/— KiCad schematic and PCB. Openusb2uart-kicad.kicad_proto get started.manufacturing/— Gerbers, drill files, BOM, and component placement CSV for JLCPCB.docs/— Reference documentation.
Parts
49| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 0.1u | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C5, C6, C8, C12 |
| 7 | TPD2E2U06 | Package_TO_SOT_SMD:SOT-323_SC-70 | D2, D3, D4, D5, D6, D7, D8 |
| 5 | 5k1 | Resistor_SMD:R_0402_1005Metric | R1, R2, R8, R9, R10 |
| 4 | M3 | MountingHole:MountingHole_3.2mm_M3_Pad_Via | MH1, MH2, MH3, MH4 |
| 3 | Fiducial | Fiducial:Fiducial_1mm_Mask2mm | FID1, FID2, FID3 |
| 2 | 16p | Capacitor_SMD:C_0402_1005Metric | C10, C11 |
| 2 | 510 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R6, R7 |
| 2 | 530480310 | Connector_Molex:Molex_PicoBlade_53048-0310_1x03_P1.25mm_Horizontal | J4, J5 |
| 2 | 530480510 | Connector_Molex:Molex_PicoBlade_53048-0510_1x05_P1.25mm_Horizontal | J2, J3 |
| 1 | 0R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric | C9 |
| 1 | 390 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4 |
| 1 | 820 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5 |
| 1 | 8MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | X1 |
| 1 | ACT_B | LED_SMD:LED_0603_1608Metric | D9 |
| 1 | CH344Q | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | PWR_G | LED_SMD:LED_0603_1608Metric | D12 |
| 1 | RX_G | LED_SMD:LED_0603_1608Metric | D11 |
| 1 | SPX3819M5-L-3-3 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | TPD1E10B06 | Package_SON:Texas_DPY0002A_0.6x1mm_P0.65mm | D1 |
| 1 | TX_R | LED_SMD:LED_0603_1608Metric | D10 |
| 1 | USB_C_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
Questions
How big is the Usb2uart kicad PCB?
It measures 41.2 × 32.6 mm and has 4 copper layers, 1.61 mm thick.
What parts does the Usb2uart kicad use?
49 parts, built around the CH344Q, SPX3819M5-L-3-3/TR, TPD2E2U06QDCKRQ1 and 0402CG150J500NT. 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 Usb2uart kicad KiCad files?
From the samvangysegem/usb2uart-hardware repository on GitHub, at the commit this page was made from: the board is usb2uart-kicad/usb2uart-kicad.kicad_pcb and its schematic usb2uart-kicad/usb2uart-kicad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Usb2uart kicad design in my own project?
Its repository states no licence, so its author keeps all rights: ask samvangysegem before reusing the design.
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