4 layers59.2 × 66 mm
2 layers16.5 × 40 mm
UART RS485
21km43/UART-RS485UART to RS485 converter
- Size
- 16.5 × 40 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 4
- Nets
- 7
- Pads
- 19
- Tracks, vias
- 41, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 23 Mar 2025
- Updated
- 27 Mar 2025
Overview
UART RS485 is an open-source printed circuit board by 21km43, from the 21km43/UART-RS485 repository on GitHub. It is a 2-layer board of 16.5 × 40 mm with 4 parts on 7 nets, routed with 41 tracks and 0 vias.
It is built around the SP3485EN-Y. Its parts include 2 connectors, 1 resistor and 1 IC. It belongs with the interfaces and adapters boards of this library.
Main components
1Parts
4| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 120 | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | Conn_01x04 | Connector_JST:JST_XH_S4B-XH-A_1x04_P2.50mm_Horizontal | J1 |
| 1 | Conn_01x05 | Connector_JST:JST_XH_S5B-XH-A_1x05_P2.50mm_Horizontal | J2 |
| 1 | SP3485EN | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
Questions
How big is the UART RS485 PCB?
It measures 16.5 × 40 mm and has 2 copper layers, 1.6 mm thick.
What parts does the UART RS485 use?
4 parts, built around the SP3485EN-Y. 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 UART RS485 KiCad files?
From the 21km43/UART-RS485 repository on GitHub, at the commit this page was made from: the board is UART-RS485.kicad_pcb and its schematic UART-RS485.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the UART RS485 design in my own project?
Its repository states no licence, so its author keeps all rights: ask 21km43 before reusing the design.
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