2 layers24 × 27.9 mm
2 layers24 × 27.9 mm
Uart33FEC
medo64/Uart33FEC1UART 3.3V Framework Expansion Card
- Size
- 24 × 27.9 mm
- Copper layers
- 2
- Thickness
- 0.8 mm
- Parts
- 30
- Nets
- 20
- Pads
- 103
- Tracks, vias
- 232, 32
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 28 Apr 2024
- Updated
- 20 Jun 2024
Overview
Uart33FEC is an open-source printed circuit board by medo64, from the medo64/Uart33FEC repository on GitHub, published under the MIT licence. It is a 2-layer board of 24 × 27.9 mm with 30 parts on 20 nets, routed with 232 tracks and 32 vias.
It is built around the FT230XS-R, AP22652W6 and AZ1117IH, with the B4B-XH-A, CUS08F30 and SM05T1G among its other parts. Its parts include 11 capacitors, 7 resistors, 2 ICs, 2 diodes and 2 connectors. It belongs with the interfaces and adapters boards of this library.
Main components
6
FT230XS-R
SSOP-16-150mil-40℃~+85℃ 125uA 3.3V~5V 8mA USB 2.0 USB to UART SSOP-16-150mil USB Converters ROHSFTDIUSB Converters
AP22652W6
SOT-26-40℃~+85℃ 1 2.1A 3V~5.5V 65mΩ Active Low High Side Switch Short-Circuit Protection(SCP)、Overcurrent Protection(OCP)、Overtemperature protection (OTP) SOT-26 Power Distribution Switches ROHSDiodes IncorporatedPower Distribution Switches
AZ1117IH
1.0 A Low-Dropout Fixed RegulatorDiodes IncorporatedUncategorised
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 3.3V 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 3.3V 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 |
|---|---|---|
| 2 | GND | Ground connection |
| 1 | RXD | Receive (3.3V TTL) |
| 3 | TXD | Transmit (3.3V TTL) |
| 4 | 3V3 | 3.3V 400mA (typical) output |
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
30| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10u | Medo64:C (0805) | C7, C8, C9, C10, C11 |
| 3 | 100n | Medo64:C (0805) | C4, C5, C6 |
| 2 | 1K | Medo64:R (0805) | R3, R4 |
| 2 | 27R | Medo64:R (0805) | R1, R2 |
| 2 | 47p | Medo64:C (0805) | C1, C2 |
| 1 | 100K | Medo64:R (0805) | R7 |
| 1 | 105444-0001 | Medo64:J USB C 3.2 Edge (24w) | J1 |
| 1 | 10K | Medo64:R (0805) | R6 |
| 1 | 10n | Medo64:C (0805) | C3 |
| 1 | 5K1 | Medo64:R (0805) | R5 |
| 1 | 600R | Medo64:L (0805) | L1 |
| 1 | ALWAYS ON | Medo64:JP (0805) | JP1 |
| 1 | AP22652 | Medo64:U LoadSwitch Adjustable [AP22652W6-7] (SOT23-6) | U2 |
| 1 | AZ1117IH | Medo64:VR Linear 3.3V 1000mA [AZ1117IH-3.3TRG1] (SOT223) | VR1 |
| 1 | B4B-XH-A | Medo64:J JST XH Edge [UART] (4w) | J2 |
| 1 | CUS08F30 | Medo64:D (SOD323) | D1 |
| 1 | FT230XS | Medo64:U Transceiver UART [FT230XS] (SSOP-16) | U1 |
| 1 | Medo64 | Medo64:ICON Medo64 | ICON |
| 1 | RX | Medo64:DS (0805) | DS1 |
| 1 | SM05T1G | Medo64:D TVS 3.3V [D1213A-02SOL-7] (SOT23-3) | D2 |
| 1 | TX | Medo64:DS (0805) | DS2 |
Questions
How big is the Uart33FEC PCB?
It measures 24 × 27.9 mm and has 2 copper layers, 0.8 mm thick.
What parts does the Uart33FEC use?
30 parts, built around the FT230XS-R, AP22652W6, AZ1117IH and B4B-XH-A. 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 Uart33FEC KiCad files?
From the medo64/Uart33FEC repository on GitHub, at the commit this page was made from: the board is src/Uart33FEC.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Uart33FEC 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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