component
CH340G
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WCH Jiangsu Qin Heng USB Converters, SOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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page.json+156−22@@ -3,43 +3,177 @@ "type": "component", "slug": "ch340g", "title": "CH340G",- "brief": "USB to UART bridge IC, SOIC-16",+ "brief": "WCH Jiangsu Qin Heng USB Converters, SOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.", "version": "0.1.0",+ "license": "CC-BY-SA-4.0", "tags": [ "component", "interface", "ch340g" ],- "license": "MIT", "component": { "mpn": "CH340G",- "manufacturer": "WCH",- "package": "SOIC-16",- "pin_count": null,- "category": "library",- "subcategory": "",- "body_size": null,- "parts": {},- "distributor_links": {}+ "manufacturer": "WCH Jiangsu Qin Heng",+ "package": "SOP-16",+ "pin_count": 16,+ "category": "Interface",+ "subcategory": "USB Converters",+ "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a3b2ca2c7638da2635df3f5b1d90bcc0.pdf",+ "parts": {+ "symbol": "ch340g.kicad_sym",+ "footprint": "ch340g.kicad_mod",+ "model_3d": "ch340g.glb",+ "model_3d_step": "ch340g.step",+ "lbr": "ch340g.lbr"+ },+ "distributor_links": {},+ "pins": [+ {+ "number": "1",+ "name": "GND",+ "type": "power_in",+ "description": "Common ground. Connect directly to the USB bus ground."+ },+ {+ "number": "2",+ "name": "TXD",+ "type": "output",+ "description": "Serial data output. Idle-high in normal UART mode. Drives external MCU RXD or an RS232/RS485 level shifter."+ },+ {+ "number": "3",+ "name": "RXD",+ "type": "input",+ "description": "Serial data input with controllable internal pull-up/pull-down. Should be high when idle. If R232 pin is high, an internal inverter is inserted (default low)."+ },+ {+ "number": "4",+ "name": "V3",+ "type": "power_in",+ "description": "Internal 3.3 V regulator node. At 5 V operation, connect a 0.1 uF decoupling capacitor to GND. At 3.3 V operation, tie V3 to VCC (both fed by external 3.3 V rail)."+ },+ {+ "number": "5",+ "name": "UD+",+ "type": "bidirectional",+ "description": "USB D+ data line. Connect directly to the USB bus D+; do NOT add a series resistor. Internal USB pull-up is built in."+ },+ {+ "number": "6",+ "name": "UD-",+ "type": "bidirectional",+ "description": "USB D- data line. Connect directly to the USB bus D-; do NOT add a series resistor."+ },+ {+ "number": "7",+ "name": "XI",+ "type": "input",+ "description": "Crystal oscillator input. Requires an external 12 MHz crystal between XI and XO with load capacitors (typ. 33 pF) to GND on each side."+ },+ {+ "number": "8",+ "name": "XO",+ "type": "output",+ "description": "Crystal oscillator output. Pairs with XI for the 12 MHz crystal reference."+ },+ {+ "number": "9",+ "name": "CTS#",+ "type": "input",+ "description": "MODEM handshake input: Clear To Send. Active low (or high if R232 auxiliary RS232 mode is enabled)."+ },+ {+ "number": "10",+ "name": "DSR#",+ "type": "input",+ "description": "MODEM handshake input: Data Set Ready. Active low (or high in auxiliary RS232 mode)."+ },+ {+ "number": "11",+ "name": "RI#",+ "type": "input",+ "description": "MODEM handshake input: Ring Indicator. Active low (or high in auxiliary RS232 mode)."+ },+ {+ "number": "12",+ "name": "DCD#",+ "type": "input",+ "description": "MODEM handshake input: Data Carrier Detect. Active low (or high in auxiliary RS232 mode)."+ },+ {+ "number": "13",+ "name": "DTR#",+ "type": "output",+ "description": "MODEM handshake output: Data Terminal Ready. Active low (or high in auxiliary RS232 mode). Doubles as a configuration input before USB enumeration (external 4.7 k\u03a9 pull-down requests higher bus current in descriptor)."+ },+ {+ "number": "14",+ "name": "RTS#",+ "type": "output",+ "description": "MODEM handshake output: Request To Send. Active low (or high in auxiliary RS232 mode)."+ },+ {+ "number": "15",+ "name": "R232",+ "type": "input",+ "description": "Auxiliary RS232 mode enable. High enables auxiliary RS232 (inverts RXD input automatically and allows discrete-transistor RS232 conversion). Internal pull-down; sampled only once after power-on reset."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply input. Accepts 5 V (typ. 4.0-5.3 V) with V3 decoupled to GND via 0.1 uF, or 3.3 V (typ. 2.9-3.6 V) with V3 shorted to VCC. Requires a 0.1 uF decoupling capacitor."+ }+ ],+ "provenance": {+ "extractor": "ds2sf",+ "datasheet": {+ "url": "https://datasheet.lcsc.com/datasheet/pdf/a3b2ca2c7638da2635df3f5b1d90bcc0.pdf",+ "pages": 10,+ "sha256": "6a6922d3c4de2d4f",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 16,+ "described": 16,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ } },- "readme": "# CH340G\n\nUSB to UART bridge IC, SOIC-16\n\nThe CH340G is a USB to serial UART interface IC from WCH. Supports baud rates up to 2Mbps. Commonly used in cheap Arduino clones and USB-serial adapters as an alternative to FTDI chips.",+ "metadata": {+ "specs": {+ "Manufacturer": "WCH Jiangsu Qin Heng",+ "Package": "SOP-16",+ "Category": "Interface",+ "Pins": "16"+ }+ },+ "sections": [+ "hero",+ "viewers",+ "readme",+ "breadcrumbs",+ "info"+ ],+ "discovery_triggers": [+ "ch340g"+ ],+ "discovery_pitch": "CH340G (WCH Jiangsu Qin Heng) component page with datasheet-verified CAD.", "author": {- "name": "Kyle Bergstedt",- "email": "[email protected]"+ "name": "Ray",+ "email": "[email protected]" },- "visibility": "public",+ "dependencies": {}, "hero": { "type": "image", "path": "docs/hero.png" },- "sample_prompts": [],- "discovery_triggers": [],- "discovery_pitch": null,- "metadata": {},- "created_at": "2026-05-28T05:33:23.808Z",- "updated_at": "2026-05-28T05:33:23.808Z",- "description": "WCH Jiangsu Qin Heng USB Converters, SOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.",- "dependencies": {}, "files": [ "page.json", "README.md",