Isolated serial adapter
About the Isolated serial adapter PCB
Isolated serial adapter is an open source PCB design by Sirawit7205, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 110 × 57 mm, with 99 components from 39 distinct parts.
Other key parts include the AMS1117-3.3, USBLC6-2SC6, CH344Q, LM809R and ADM2483BRWZ. By type, the board carries 29 capacitors, 25 diodes, 19 resistors, 11 ICs, 9 connectors and 2 switches.
It belongs with the usb & debug tools designs in this gallery.
From the project
Isolated Quad-Channel USB-to-Serial Adapter based on CH344Q IC from WCH
This is an open-source KiCAD design files for a four-channel isolated USB-to-Serial adapter based on CH344Q IC from WCH.
This adapter is convenient when you want to connect multiple serial devices to your computer simultaneously, while also provides isolation between your computer and those devices.
- Four USB-to-Serial channels - CH344Q IC: Only one USB required to communicate with all fours channels at the same time at maximum speed of 6Mbps. - 1024 bytes of RX FIFO buffer and 512 bytes of TX FIFO buffer per channel. - Configured as 2x RS485, 1x RS232, and 1x 5V UART channels. - Modem…
Main components on the Isolated serial adapter
Isolated serial adapter bill of materials (BOM)
99 components, 39 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U1 |
| 1 | USBLC6-2SC6 | SOT-23-6 | U2 |
| 1 | CH344Q | LQFP-48_7x7mm_P0.5mm | U3 |
| 1 | LM809R | SOT-23 | U4 |
| 2 | ADM2483BRWZ | SOIC-16W_7.5x10.3mm_P1.27mm | U5, U6 |
| 1 | ADM3251E | SOIC-20W_7.5x12.8mm_P1.27mm | U7 |
| 2 | CA-IS3742HW | SOIC-16W_7.5x10.3mm_P1.27mm | U8, U11 |
| 1 | CA-IS3720HG | SOIC-8_7.5x5.85mm_P1.27mm_modified | U9 |
| 1 | CA-IS3741HW | SOIC-16W_7.5x10.3mm_P1.27mm | U10 |
| 1 | 8MHz | Crystal_SMD_5032-2Pin_5.0x3.2mm | Y1 |
| 1 | USB_C_Receptacle_USB2.0 | USB_C_Receptacle_HRO_TYPE-C-31-M-12_NO_SBU | J1 |
| 1 | RS485_1 | TerminalBlock_Degson_1x04_P3.50mm_Horizontal | J2 |
| 2 | TERM | PinHeader_1x03_P2.54mm_Vertical | J3, J4 |
| 1 | RS485_2 | TerminalBlock_Degson_1x04_P3.50mm_Horizontal | J5 |
| 1 | RS232_1 | TerminalBlock_Degson_1x04_P3.50mm_Horizontal | J6 |
| 1 | RS232_1_FLOW | PinHeader_2x03_P2.54mm_Horizontal | J7 |
| 1 | UART_1 | TerminalBlock_Degson_1x04_P3.50mm_Horizontal | J8 |
| 1 | UART_1_FLOW | PinHeader_2x03_P2.54mm_Horizontal | J9 |
| 1 | 1nF | C_Disc_D7.5mm_W5.0mm_P7.50mm | CY1 |
| 1 | BSMD1812-300-16V | Fuse_1812_4532Metric | F1 |
Show 19 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | IA0505S | Converter_DCDC_XP_POWER-IAxxxxS_THT | PS1 |
| 1 | RESET | SW_Tactile_SPST_Angled_PTS645Vx83-2LFS | SW1 |
| 1 | FLOW_EN | SW_Tactile_SPST_Angled_PTS645Vx83-2LFS | SW2 |
| 1 | PWR1 | LED_Rectangular_W3.0mm_H2.0mm | D1 |
| 1 | PWR2 | LED_Rectangular_W3.0mm_H2.0mm | D2 |
| 1 | ACT | LED_Rectangular_W3.0mm_H2.0mm | D3 |
| 1 | TX | LED_Rectangular_W3.0mm_H2.0mm | D4 |
| 1 | RX | LED_Rectangular_W3.0mm_H2.0mm | D5 |
| 2 | SM712 | SOT-23 | D6, D8 |
| 2 | SMF12CA | D_SOD-123F | D7, D9 |
| 16 | SMF15CA | D_SOD-123F | D10, D11, D12, D13, D14, D15, D16, D17 +8 |
| 4 | 10uF | CP_Radial_D4.0mm_P1.50mm | C1, C2, C3, C4 |
| 23 | 100nF | C_0603_1608Metric | C5, C6, C7, C8, C9, C12, C13, C14 +15 |
| 2 | 22pF | C_0603_1608Metric | C10, C11 |
| 5 | 1K | R_0603_1608Metric | R1, R2, R8, R9, R10 |
| 7 | 5K1 | R_0603_1608Metric | R3, R4, R5, R6, R7, R11, R12 |
| 4 | 680R | R_0603_1608Metric | R13, R16, R17, R19 |
| 2 | 120R | R_0603_1608Metric | R14, R18 |
| 1 | 100K | R_0603_1608Metric | R15 |
Isolated serial adapter design files
The KiCad project lives in the Sirawit7205/isolated-serial-adapter repository on GitHub; these links point at the commit this page was built from.
Isolated serial adapter: common questions
How big is the Isolated serial adapter PCB?
The Isolated serial adapter measures 110 × 57 mm, has 4 copper layers and is 4.69 mm thick.
How many components are on the Isolated serial adapter?
99 components, from 39 distinct parts. The full bill of materials is listed on this page.
Where can I download the Isolated serial adapter design files?
From the Sirawit7205/isolated-serial-adapter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Isolated serial adapter design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which Sirawit7205 chose for the repository.
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