2 layers58 × 56 mm
CH32L103C8T6-R0
ch32-riscv-ug/CH32L103
Choose a part Documents Pin maps Pin viewer Errata Examples Address map
55 parts2
2 layers57.9 × 30 mm
Sfp stick
b4ck5p4c3/sfpBunch of stuff related to SFP/SFP+ modules
- Size
- 57.9 × 30 mm
- Copper layers
- 2
- Thickness
- 1.58 mm
- Parts
- 24
- Nets
- 58
- Pads
- 125
- Tracks, vias
- 92, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Jan 2025
- Updated
- 4 Mar 2026
Overview
Sfp stick is an open-source printed circuit board by b4ck5p4c3, from the b4ck5p4c3/sfp repository on GitHub. It is a 2-layer board of 57.9 × 30 mm with 24 parts on 58 nets, routed with 92 tracks and 0 vias.
It is built around the CH32L103C8T6. Its parts include 7 capacitors, 4 resistors, 2 ICs and 2 connectors.
Main components
1README
README.mdEntering password
# Writing 4-byte long block data to address 0x7b on DMM (0x51)
i2cset 1 0x51 0x7b 0x00 0x00 0x10 0x11 iParts
24| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 0.1uF 6.3V | Capacitor_SMD:C_0805_2012Metric | C2, C3, C4, C6, C7 |
| 4 | 5K1 | Resistor_SMD:R_0805_2012Metric | R1, R2, R3, R4 |
| 2 | 10uF 16V | Capacitor_SMD:C_0805_2012Metric | C1, C5 |
| 2 | M3 | MountingHole:MountingHole_3.2mm_M3_ISO7380_Pad | H1, H2 |
| 1 | 3V3 | TestPoint:TestPoint_Pad_D1.5mm | TP7 |
| 1 | CH32L103C8T6 | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | GND | TestPoint:TestPoint_Pad_1.5x1.5mm | TP6 |
| 1 | LT1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | NRST | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1 |
| 1 | SCL | TestPoint:TestPoint_Pad_1.5x1.5mm | TP3 |
| 1 | SDA | TestPoint:TestPoint_Pad_D1.5mm | TP2 |
| 1 | SFP+ | BKSP:Connector_SFP_NoCage | J1 |
| 1 | SWCLK | TestPoint:TestPoint_Pad_1.5x1.5mm | TP5 |
| 1 | SWDIO | TestPoint:TestPoint_Pad_D1.5mm | TP4 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J2 |
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Questions
How big is the Sfp stick PCB?
It measures 57.9 × 30 mm and has 2 copper layers, 1.58 mm thick.
What parts does the Sfp stick use?
24 parts, built around the CH32L103C8T6. 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 Sfp stick KiCad files?
From the b4ck5p4c3/sfp repository on GitHub, at the commit this page was made from: the board is devices/sfp-stick/sfp-stick.kicad_pcb and its schematic devices/sfp-stick/sfp-stick.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sfp stick design in my own project?
Its repository states no licence, so its author keeps all rights: ask b4ck5p4c3 before reusing the design.