2 layers46.7 × 30.9 mm
Uw rs485 hat
tomrodinger/Raspberry_Pi_HAT_RS485
This is a Raspberry Pi HAT for RS485 communication with external devices and it should fit into any Raspberry Pi like Zero/Zero2W/3/4
48 partsApache-2.0
2 layers46.7 × 30.9 mm
Uw rs485 hat V5
tomrodinger/Raspberry_Pi_HAT_RS485This is a Raspberry Pi HAT for RS485 communication with external devices and it should fit into any Raspberry Pi like Zero/Zero2W/3/4
- Size
- 46.7 × 30.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 54
- Nets
- 62
- Pads
- 254
- Tracks, vias
- 577, 76
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 29 May 2023
- Updated
- 19 Nov 2025
Overview
Uw rs485 hat V5 is an open-source printed circuit board by tomrodinger, from the tomrodinger/Raspberry_Pi_HAT_RS485 repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 46.7 × 30.9 mm with 54 parts on 62 nets, routed with 577 tracks and 76 vias.
It is built around the CP2102, CD4023BM/TR and LM393DR2GH, with the SP3485EN-Y, 22PF/50V 10% and MMS9012-H-TP among its other parts. Its parts include 21 resistors, 12 capacitors, 5 connectors, 5 inductors and 4 ICs. It belongs with the interfaces and adapters boards of this library.
Main components
7
CP2102
-Non-isolated TYPE-A UART(TTL) USB2.0 - USB Conversion Modules ROHSAi-ThinkerUSB Conversion Modules
CD4023BM/TR
SOIC-14-40℃~+105℃ 0V~50mV 1.5V、3V、4V 3 3 3.5V、7V、11V 3V~15V 4.95V~5V、9.95V~10V、14.95V~15V 4000 Series 45ns@15V,50pF 6.8mA 6.8mA NAND Gate SOIC-14 Logic Gates ROHSHGSEMILogic Gates
LM393DR2GH
SOP-8ESD Protection SOP-8 Comparators ROHSonsemiComparators
SP3485EN-Y
SOP-8SOP-8 RS-485 / RS-422 ICs ROHSYLPTECRS-485 / RS-422 ICs22PF/50V 10%
插件插件 Through Hole Ceramic Capacitors ROHSMade in ChinaThrough Hole Ceramic Capacitors
MMS9012-H-TP
SOT-23-55℃~+150℃ 1 PNP 100nA 150MHz 200 25V 300mW 500mA 5V 600mV PNP SOT-23 Bipolar (BJT) ROHSMicro Commercial ComponentsBipolar Transistors - BJTSM712
SOT-23-55℃~+125℃ 12A 16V、26V 1uA、2uA 2 300W 7.5V、13.5V 75pF 7V、12V Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5 SOT-23 ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
README
README.mdRaspberry_Pi_HAT_RS485
This is a Raspberry Pi HAT for RS485 communication with external devices and it should fit into any Raspberry Pi like Zero/Zero2W/3/4
Parts
54| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 100nF/50V | Capacitor_SMD:C_0603_1608Metric | C2, C4, C7, C8, C9, C11, C12, C16 |
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R3, R4, R6, R7, R8, R16, R19 |
| 5 | Bead_300R | Celebi:SM0603L | L1, L2, L3, L4, L5 |
| 4 | 1k | Resistor_SMD:R_0603_1608Metric | R9, R10, R11, R12 |
| 3 | 560R | Resistor_SMD:R_0603_1608Metric | R13, R18, R22 |
| 2 | 10uF/16V | Capacitor_SMD:C_0805_2012Metric | C3, C5 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R14, R15 |
| 1 | 1nF | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 20k | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 220R | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 22pF/50V | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R21 |
| 1 | 4k7 | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | CD4023BM/TR | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U6 |
| 1 | CM_Choke_90R | Celebi:tr-smd-WE-CNSW_0805 | T1 |
| 1 | CP2102 | Celebi:QFN28_5x5_P0.5mm_ppad | U1 |
| 1 | CUS08F30-H3F | Celebi:SOD323 | D2 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | LM393DR2G | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | LOGO | QR:QR-18-06-23 | G*** |
| 1 | MMS9012-H-TP | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Raspberry-Pi_2x5-Pin_Header | rs485RPihat:con-WR-PHD-61031021821 | J3 |
| 1 | SM712 | Celebi:SOT23-3 | D3 |
| 1 | SP3485EN | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | TSM-108-01-T-SH-A-P-TR | conn:SAMTEC_TSM-108-01-T-SH-A-P-TR | J2 |
| 1 | TVS_5V | Celebi:SOT23-6L | D1 |
| 1 | USB-Micro | Celebi:usb-MicroXNJ | J1 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_Palconn_UTC16-G | J5 |
| 1 | green | LED_SMD:LED_0603_1608Metric | D4 |
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Questions
How big is the Uw rs485 hat V5 PCB?
It measures 46.7 × 30.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Uw rs485 hat V5 use?
54 parts, built around the CP2102, CD4023BM/TR, LM393DR2GH and 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 Uw rs485 hat V5 KiCad files?
From the tomrodinger/Raspberry_Pi_HAT_RS485 repository on GitHub, at the commit this page was made from: the board is PCB/V5/source/KiCAD/uw-rs485_hat-V5.kicad_pcb and its schematic PCB/1.1/1.1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Uw rs485 hat V5 design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).