4 layers120 × 65 mm
2 layers50 × 56 mm
Bios programmer ch341a
malavon/kicad-ch341-programmer- Size
- 50 × 56 mm
- Copper layers
- 2
- Thickness
- 1 mm
- Parts
- 56
- Nets
- 63
- Pads
- 212
- Tracks, vias
- 376, 122
- Pours
- 14
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 10 Apr 2026
- Updated
- 10 May 2026
Overview
Bios programmer ch341a is an open-source printed circuit board by malavon, from the malavon/kicad-ch341-programmer repository on GitHub. It is a 2-layer board of 50 × 56 mm with 56 parts on 63 nets, routed with 376 tracks and 122 vias.
It is built around the ADUM1252AWA+, CH341A and ISO6741DW, with the SSM3J328R,LF among its other parts. Its parts include 21 resistors, 11 capacitors, 7 connectors, 5 diodes and 4 ICs. It belongs with the interfaces and adapters boards of this library.
Main components
4
ADUM1252AWA+
SOIC-8Bidirectional automatic direction、Open-drain buffer output、Hotswap、Clock stretching、Multi-voltage domain interface SOIC-8 I2C Isolators ROHSMaxim Integrated (Analog Devices)I2C Isolators
CH341A
SOP-28-300mil120uA 12mA 2Mbps 3.3V、5V USB 2.0 USB to UART、USB to SPI、USB to I2C、USB to printer、USB to parallel port SOP-28-300mil USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
ISO6741DW
SOIC-16-300mil-40℃~+125℃ 1 1.71V~5.5V 1.71V~5.5V 11ns 150kV/us 3 5000 50Mbps Fail-safe output High Level SOIC-16-300mil Digital Isolators ROHSTexas InstrumentsDigital Isolators
SSM3J328R,LF
SOT-23-31 P-Channel 118pF 12.8nC@4.5V 1V 1W 20V 6A 840pF 88.4mΩ@1.5V 99pF P-Channel SOT-23F MOSFETs ROHSToshibaMOSFET
Parts
56| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 1kΩ | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R3, R9, R10, R15, R16, R18, R19, R20, R21 |
| 6 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C6, C7, C8, C9, C12 |
| 6 | 200Ω | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R4, R5, R12, R13, R17 |
| 4 | SSM3J328R | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4 |
| 3 | 10KΩ | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R6, R11, R14 |
| 2 | 1nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C10, C11 |
| 2 | 22pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2 |
| 2 | IDC | footprints:IDC-Header_2x05_P2.54mm_Horizontal_1.64mm_pad | J7, J8 |
| 2 | MountingHole | MountingHole:MountingHole_2.2mm_M2_ISO14580_Pad_TopBottom | H1, H2 |
| 2 | Red | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4, D5 |
| 2 | YellowGreen | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2, D3 |
| 1 | +Banana+ | Connector:Banana_Cliff_FCR7350R_S16N-PC_Horizontal | J5 |
| 1 | -Banana- | Connector:Banana_Cliff_FCR7350B_S16N-PC_Horizontal | J4 |
| 1 | 10µF | Capacitor_SMD:C_0805_2012Metric | C4 |
| 1 | 12MHz | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | 4k7Ω | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8 |
| 1 | 5k6Ω | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7 |
| 1 | ADuM1252 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | Blue | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1 |
| 1 | CH341A | Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm | U1 |
| 1 | ISO6741 | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U2 |
| 1 | SPST | Button_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFS | SW1 |
| 1 | TL432DBZ | Package_TO_SOT_SMD:SOT-23 | U4 |
| 1 | Terminal Block | TerminalBlock_TE-Connectivity:TerminalBlock_TE_282834-2_1x02_P2.54mm_Horizontal | J9 |
| 1 | USB_B_Micro | footprints:USB_Micro-B_Amphenol_10118194-0001LF_Horizontal | J1 |
| 1 | ZIF16 | footprints:ZIF_Socket | J6 |
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Questions
How big is the Bios programmer ch341a PCB?
It measures 50 × 56 mm and has 2 copper layers, 1 mm thick.
What parts does the Bios programmer ch341a use?
56 parts, built around the ADUM1252AWA+, CH341A, ISO6741DW and SSM3J328R,LF. 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 Bios programmer ch341a KiCad files?
From the malavon/kicad-ch341-programmer repository on GitHub, at the commit this page was made from: the board is bios-programmer-ch341a.kicad_pcb and its schematic bios-programmer-ch341a.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Bios programmer ch341a design in my own project?
Its repository states no licence, so its author keeps all rights: ask malavon before reusing the design.