2 layers24 × 27.9 mm
2 layers24 × 27.9 mm
Uart50FEC
medo64/Uart50FECUART 5V Framework Expansion Card
- Size
- 24 × 27.9 mm
- Copper layers
- 2
- Thickness
- 0.8 mm
- Parts
- 24
- Nets
- 17
- Pads
- 101
- Tracks, vias
- 223, 31
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 28 Apr 2024
- Updated
- 10 Jun 2024
Overview
Uart50FEC is an open-source printed circuit board by medo64, from the medo64/Uart50FEC repository on GitHub, published under the MIT licence. It is a 2-layer board of 24 × 27.9 mm with 24 parts on 17 nets, routed with 223 tracks and 31 vias.
It is built around the FT232RL, B4B-XH-A and CUS08F30, with the SM05T1G among its other parts. Its parts include 8 capacitors, 5 resistors, 2 ICs, 2 diodes and 2 connectors. It belongs with the interfaces and adapters boards of this library.
Main components
4
FT232RL
SSOP-28-208mil-40℃~+85℃ 3.3V~5.25V、4V~5.25V USB 2.0 USB to UART SSOP-28-208mil USB Converters ROHSFTDIUSB Converters
B4B-XH-A
插件,P=2.5mm,4PUncategorisedJST
CUS08F30
SOD-323Schottky DiodesDOWO
SM05T1G
SOT-2310uA 17A@8/20us 2 225pF 300W@8/20us 5V 7.3V 9.8V IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 TVS SOT-23 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
README
README.mdUART 5V Framework Expansion Card
This Framework laptop expansion card will show up on your system as a serial device and allow for a non-isolated serial UART communication up to 1 Mbaud baud rate.
Please note that this card is not using RS-232 but 5V TTL.
UART Pinout
To connect to this board, one has to use a 4-pin JST XH connector. The following table represents the pinout, pin 1 being on the left as looking into the expansion card.
| # | Ref | Description |
|---|---|---|
| 1 | GND | Ground connection |
| 2 | RXD | Receive (5V TTL) |
| 3 | TXD | Transmit (5V TTL) |
| 4 | 5V | 5V 500mA output (typical) |
Using 22 AWG wire 0.25 mm² is recommended.
Supported Speeds
This board employs the FT232R as its UART chip, and consequently, it supports all the baud rates this chip can handle. The table below lists the standard baud rates.
| Baud rate | Actual | Error | Divisor |
|---|---|---|---|
| 300 | 300 | 0.00% | 10000.000 |
| 600 | 600 | 0.00% | 5000.000 |
| 1,200 | 1,200 | 0.00% | 2500.000 |
| 1,800 | 1,800 | 0.00% | 1666.625 |
| 2,400 | 2,400 | 0.00% | 1250.000 |
| 4,800 | 4,800 | 0.00% | 625.000 |
| 7,200 | 7,201 | 0.01% | 416.625 |
| 9,600 | 9,600 | 0.00% | 312.500 |
| 14,400 | 14,406 | 0.04% | 208.250 |
| 19,200 | 19,200 | 0.00% | 156.250 |
| 28,800 | 28,812 | 0.04% | 104.125 |
| 38,400 | 38,400 | 0.00% | 78.125 |
| 57,600 | 57,692 | 0.16% | 52.000 |
| 115,200 | 115,385 | 0.16% | 26.000 |
| 230,400 | 230,769 | 0.16% | 13.000 |
| 460,800 | 461,538 | 0.16% | 6.500 |
| 921,600 | 923,077 | 0.16% | 3.250 |
| 1,000,000 | 1,000,000 | 0.00% | 3.000 |
While chip does support baud rates up to 3 Mbaud, granularity of such rates is severely limited.
You can check my blog and other projects at www.medo64.com.
Parts
24| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100n | Medo64:C (0805) | C2, C3, C4, C5 |
| 3 | 10u | Medo64:C (0805) | C6, C7, C8 |
| 2 | 1K | Medo64:R (0805) | R1, R2 |
| 1 | 105444-0001 | Medo64:J USB C 3.2 Edge (24w) | J1 |
| 1 | 10K | Medo64:R (0805) | R4 |
| 1 | 10n | Medo64:C (0805) | C1 |
| 1 | 5K1 | Medo64:R (0805) | R3 |
| 1 | 600R | Medo64:L (0805) | L1 |
| 1 | 75K | Medo64:R (0805) | R5 |
| 1 | ALWAYS ON | Medo64:JP (0805) | JP1 |
| 1 | B4B-XH-A | Medo64:J JST XH Edge [UART] (4w) | J2 |
| 1 | CUS08F30 | Medo64:D (SOD323) | D1 |
| 1 | FT232RL | Medo64:U Transceiver UART [FT232R] (SSOP-28) | U1 |
| 1 | MIC2005A-1 | Medo64:U LoadSwitch Adjustable [AP22652W6-7] (SOT23-6) | U2 |
| 1 | Medo64 | Medo64:ICON Medo64 | ICON |
| 1 | RX | Medo64:DS (0805) | DS1 |
| 1 | SM05T1G | Medo64:D TVS 5V [SM05T1G] (SOT23-3) | D2 |
| 1 | TX | Medo64:DS (0805) | DS2 |
Questions
How big is the Uart50FEC PCB?
It measures 24 × 27.9 mm and has 2 copper layers, 0.8 mm thick.
What parts does the Uart50FEC use?
24 parts, built around the FT232RL, B4B-XH-A, CUS08F30 and SM05T1G. 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 Uart50FEC KiCad files?
From the medo64/Uart50FEC repository on GitHub, at the commit this page was made from: the board is src/Uart50FEC.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Uart50FEC design in my own project?
Its repository publishes it under the MIT 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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