component
CH340B
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WCH Jiangsu Qin Heng USB Converters, SOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# CH340B++**WCH Jiangsu Qin Heng** · USB Converters · SOP-16++CH340B from WCH Jiangsu Qin Heng, in a SOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | GND | power_in | Common ground, directly connected to USB bus ground line. |+| 2 | TXD | output | Serial data output with idle state high level for CH340C/N/E/X/B/T. |+| 3 | RXD | input | Serial data input with built-in controllable pull-up and pull-down resistors. |+| 4 | V3 | power_in | 3.3V power supply connection for external power input (3.3V mode) or 0.1µF power decoupling capacitor (5V mode). |+| 5 | UD+ | bidirectional | Direct connection to USB bus D+ data line, do not add series resistor. |+| 6 | UD- | bidirectional | Direct connection to USB bus D- data line, do not add series resistor. |+| 7 | RST# | input | External reset input, active low with internal pull-up resistor (CH340B only). |+| 8 | NC | unconnected | No connection, empty pin must be left floating (CH340B only). |+| 9 | CTS# | input | MODEM contact input signal for clear to send, active low or high per software definition. |+| 10 | DSR# | input | MODEM contact input signal for data set ready, active low or high per software definition. |+| 11 | RI# | input | MODEM contact input signal for ring indicator, active low or high per software definition. |+| 12 | DCD# | input | MODEM contact input signal for carrier detect, active low or high per software definition. |+| 13 | DTR# | output | MODEM contact output signal for data terminal ready, active low or high per software definition. |+| 14 | RTS# | output | MODEM contact output signal for request to send, active low or high per software definition. |+| 15 | TNOW | output | Serial port transmission in progress status indicator, active high level (CH340T/E/X/B). |+| 16 | VCC | power_in | Positive power supply input, requires external 0.1µF power decoupling capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | WCH Jiangsu Qin Heng |+| Package | SOP-16 |+| Category | Interface |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `CH340B`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [WCH Jiangsu Qin Heng datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618867607621410816) (10 pp, sha256 `6a6922d3c4de2d4f`, retrieved 2026-09-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ch340b-datasheet.pdf)
page.jsonadded+186@@ -0,0 +1,186 @@+{+ "slug": "ch340b",+ "version": "0.1.0",+ "type": "component",+ "description": "WCH Jiangsu Qin Heng USB Converters, SOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "interface",+ "ch340b",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "ch340b.kicad_sym",+ "ch340b.kicad_mod",+ "ch340b.glb",+ "ch340b.step",+ "ch340b.lbr",+ "docs/hero.png",+ "docs/ch340b-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "CH340B",+ "manufacturer": "WCH Jiangsu Qin Heng",+ "package": "SOP-16",+ "pin_count": 16,+ "category": "Interface",+ "subcategory": "USB Converters",+ "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618867607621410816",+ "parts": {+ "symbol": "ch340b.kicad_sym",+ "footprint": "ch340b.kicad_mod",+ "model_3d": "ch340b.glb",+ "model_3d_step": "ch340b.step",+ "lbr": "ch340b.lbr"+ },+ "distributor_links": {+ "lcsc": "C81010"+ },+ "pins": [+ {+ "number": "1",+ "name": "GND",+ "type": "power_in",+ "description": "Common ground, directly connected to USB bus ground line."+ },+ {+ "number": "2",+ "name": "TXD",+ "type": "output",+ "description": "Serial data output with idle state high level for CH340C/N/E/X/B/T."+ },+ {+ "number": "3",+ "name": "RXD",+ "type": "input",+ "description": "Serial data input with built-in controllable pull-up and pull-down resistors."+ },+ {+ "number": "4",+ "name": "V3",+ "type": "power_in",+ "description": "3.3V power supply connection for external power input (3.3V mode) or 0.1µF power decoupling capacitor (5V mode)."+ },+ {+ "number": "5",+ "name": "UD+",+ "type": "bidirectional",+ "description": "Direct connection to USB bus D+ data line, do not add series resistor."+ },+ {+ "number": "6",+ "name": "UD-",+ "type": "bidirectional",+ "description": "Direct connection to USB bus D- data line, do not add series resistor."+ },+ {+ "number": "7",+ "name": "RST#",+ "type": "input",+ "description": "External reset input, active low with internal pull-up resistor (CH340B only)."+ },+ {+ "number": "8",+ "name": "NC",+ "type": "unconnected",+ "description": "No connection, empty pin must be left floating (CH340B only)."+ },+ {+ "number": "9",+ "name": "CTS#",+ "type": "input",+ "description": "MODEM contact input signal for clear to send, active low or high per software definition."+ },+ {+ "number": "10",+ "name": "DSR#",+ "type": "input",+ "description": "MODEM contact input signal for data set ready, active low or high per software definition."+ },+ {+ "number": "11",+ "name": "RI#",+ "type": "input",+ "description": "MODEM contact input signal for ring indicator, active low or high per software definition."+ },+ {+ "number": "12",+ "name": "DCD#",+ "type": "input",+ "description": "MODEM contact input signal for carrier detect, active low or high per software definition."+ },+ {+ "number": "13",+ "name": "DTR#",+ "type": "output",+ "description": "MODEM contact output signal for data terminal ready, active low or high per software definition."+ },+ {+ "number": "14",+ "name": "RTS#",+ "type": "output",+ "description": "MODEM contact output signal for request to send, active low or high per software definition."+ },+ {+ "number": "15",+ "name": "TNOW",+ "type": "output",+ "description": "Serial port transmission in progress status indicator, active high level (CH340T/E/X/B)."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive power supply input, requires external 0.1µF power decoupling capacitor."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 10,+ "cost_usd": 0.3155,+ "at": "2026-09-17T18:31:54"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8618867607621410816",+ "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"+ }+ },+ "visibility": "public",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}