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CH450H
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WCH Jiangsu Qin Heng Digital Tube Drivers, SOP-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+57@@ -0,0 +1,57 @@+# CH450H++**WCH Jiangsu Qin Heng** · Digital Tube Drivers · SOP-20-300mil++CH450H from WCH Jiangsu Qin Heng, in a SOP-20-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | DIG3 | output | Digit-3 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink, max continuous per-pin current 120 mA. |+| 2 | DIG4 | output | Digit-4 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink, VOH ≥4.5 V at 8 mA. |+| 3 | SCL | input | 2-wire serial clock input; internal pull-up 100-300 µA; data sampled on rising edge; VIL ≤0.8 V, VIH ≥2.0 V; clock rate 0-2 MHz. |+| 4 | SDA | bidirectional | 2-wire serial data input and open-drain output; internal pull-up 250-400 µA; MSB first; VIL ≤0.8 V, VIH ≥2.0 V; output valid within 30 ns of SCL falling edge. |+| 5 | GND | power_in | Common ground reference; continuous current rating not less than 100 mA; decouple with ≥0.1 µF ceramic and ≥100 µF electrolytic capacitor near VCC-GND pins. |+| 6 | DIG5 | output | Digit-5 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink. |+| 7 | DIG6 | output | Digit-6 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink. |+| 8 | DIG7 | output | Digit-7 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink. |+| 9 | RSTH | output | Power-on reset output, active-high; threshold voltage 2.3-2.9 V; reset pulse duration 6-50 ms; VOH ≥4.5 V at 4 mA, VOL ≤0.5 V at 4 mA. |+| 10 | SEG0 | tri_state | Segment-A drive, tri-state output active-high (min 15 mA source, VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA; VILseg ≤0.5 V, VIHseg ≥1.8 V. |+| 11 | SEG1 | tri_state | Segment-B drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA. |+| 12 | VCC | power_in | Positive supply voltage 3.0-5.5 V; continuous current not less than 100 mA; max 6.0 V absolute; decouple with ≥0.1 µF ceramic and ≥100 µF electrolytic near pin. |+| 13 | SEG2 | tri_state | Segment-C drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA. |+| 14 | SEG3 | tri_state | Segment-D drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA; can wake CH450 from sleep when active. |+| 15 | SEG4 | tri_state | Segment-E drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA. |+| 16 | SEG5 | tri_state | Segment-F drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA. |+| 17 | SEG6 | tri_state | Segment-G drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA. |+| 18 | SEG7 | tri_state | Decimal-point segment drive, tri-state output active-high; keyboard row-scan input active-high with internal pull-down −50 µA; max continuous per-pin segment current 25 mA, total all-SEG current 130 mA. |+| 19 | INT# | tri_state | Keyboard interrupt output, active-low, open-drain with internal pull-up 500-5000 µA; asserted when valid keypress detected; deasserted automatically after MCU reads keycode via SDA. |+| 20 | DIG2 | output | Digit-2 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink, max continuous per-pin current 120 mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | WCH Jiangsu Qin Heng |+| Package | SOP-20-300mil |+| Category | LED Drivers |+| Pins | 20 |++## CAD (KiCad official)++- Symbol: `CH450H`+- Footprint: `Package_SO:SOP-20_7.5x12.8mm_P1.27mm`+- 3D model: SOP-20-300mil, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 2.65 mm nominal SOIC height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)+- 3D model files: `ch450h-etched.step` / `ch450h-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ch450h.step` / `ch450h.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [WCH Jiangsu Qin Heng datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588882455986114560) (9 pp, sha256 `eab0a68adccc158e`, retrieved 2026-10-01, 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/ch450h-datasheet.pdf)
page.jsonadded+225@@ -0,0 +1,225 @@+{+ "slug": "ch450h",+ "version": "0.1.0",+ "type": "component",+ "description": "WCH Jiangsu Qin Heng Digital Tube Drivers, SOP-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "led drivers",+ "ch450h",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "ch450h.kicad_sym",+ "ch450h.kicad_mod",+ "ch450h.glb",+ "ch450h.step",+ "ch450h.lbr",+ "docs/hero.png",+ "docs/ch450h-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "CH450H",+ "manufacturer": "WCH Jiangsu Qin Heng",+ "package": "SOP-20-300mil",+ "pin_count": 20,+ "category": "LED Drivers",+ "subcategory": "Digital Tube Drivers",+ "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588882455986114560",+ "parts": {+ "symbol": "ch450h.kicad_sym",+ "footprint": "ch450h.kicad_mod",+ "model_3d": "ch450h-etched.glb",+ "model_3d_plain": "ch450h.glb",+ "model_3d_step": "ch450h-etched.step",+ "model_3d_step_plain": "ch450h.step",+ "lbr": "ch450h.lbr"+ },+ "distributor_links": {+ "lcsc": "C56245"+ },+ "distributor_check": {+ "checked_at": "2026-10-01T17:31:50Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": null,+ "status": "no match"+ },+ "mouser": {+ "pn": null,+ "status": "no match"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "DIG3",+ "type": "output",+ "description": "Digit-3 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink, max continuous per-pin current 120 mA."+ },+ {+ "number": "2",+ "name": "DIG4",+ "type": "output",+ "description": "Digit-4 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink, VOH ≥4.5 V at 8 mA."+ },+ {+ "number": "3",+ "name": "SCL",+ "type": "input",+ "description": "2-wire serial clock input; internal pull-up 100-300 µA; data sampled on rising edge; VIL ≤0.8 V, VIH ≥2.0 V; clock rate 0-2 MHz."+ },+ {+ "number": "4",+ "name": "SDA",+ "type": "bidirectional",+ "description": "2-wire serial data input and open-drain output; internal pull-up 250-400 µA; MSB first; VIL ≤0.8 V, VIH ≥2.0 V; output valid within 30 ns of SCL falling edge."+ },+ {+ "number": "5",+ "name": "GND",+ "type": "power_in",+ "description": "Common ground reference; continuous current rating not less than 100 mA; decouple with ≥0.1 µF ceramic and ≥100 µF electrolytic capacitor near VCC-GND pins."+ },+ {+ "number": "6",+ "name": "DIG5",+ "type": "output",+ "description": "Digit-5 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink."+ },+ {+ "number": "7",+ "name": "DIG6",+ "type": "output",+ "description": "Digit-6 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink."+ },+ {+ "number": "8",+ "name": "DIG7",+ "type": "output",+ "description": "Digit-7 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink."+ },+ {+ "number": "9",+ "name": "RSTH",+ "type": "output",+ "description": "Power-on reset output, active-high; threshold voltage 2.3-2.9 V; reset pulse duration 6-50 ms; VOH ≥4.5 V at 4 mA, VOL ≤0.5 V at 4 mA."+ },+ {+ "number": "10",+ "name": "SEG0",+ "type": "tri_state",+ "description": "Segment-A drive, tri-state output active-high (min 15 mA source, VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA; VILseg ≤0.5 V, VIHseg ≥1.8 V."+ },+ {+ "number": "11",+ "name": "SEG1",+ "type": "tri_state",+ "description": "Segment-B drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA."+ },+ {+ "number": "12",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply voltage 3.0-5.5 V; continuous current not less than 100 mA; max 6.0 V absolute; decouple with ≥0.1 µF ceramic and ≥100 µF electrolytic near pin."+ },+ {+ "number": "13",+ "name": "SEG2",+ "type": "tri_state",+ "description": "Segment-C drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA."+ },+ {+ "number": "14",+ "name": "SEG3",+ "type": "tri_state",+ "description": "Segment-D drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA; can wake CH450 from sleep when active."+ },+ {+ "number": "15",+ "name": "SEG4",+ "type": "tri_state",+ "description": "Segment-E drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA."+ },+ {+ "number": "16",+ "name": "SEG5",+ "type": "tri_state",+ "description": "Segment-F drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA."+ },+ {+ "number": "17",+ "name": "SEG6",+ "type": "tri_state",+ "description": "Segment-G drive, tri-state output active-high (VOH ≥4.5 V at 15 mA, VOL ≤0.5 V at 18 mA); keyboard row-scan input active-high with internal pull-down −50 µA."+ },+ {+ "number": "18",+ "name": "SEG7",+ "type": "tri_state",+ "description": "Decimal-point segment drive, tri-state output active-high; keyboard row-scan input active-high with internal pull-down −50 µA; max continuous per-pin segment current 25 mA, total all-SEG current 130 mA."+ },+ {+ "number": "19",+ "name": "INT#",+ "type": "tri_state",+ "description": "Keyboard interrupt output, active-low, open-drain with internal pull-up 500-5000 µA; asserted when valid keypress detected; deasserted automatically after MCU reads keycode via SDA."+ },+ {+ "number": "20",+ "name": "DIG2",+ "type": "output",+ "description": "Digit-2 cathode drive output for 7-segment display, active-low; doubles as keyboard column-scan output active-high; VOL ≤0.8 V at 80 mA sink, max continuous per-pin current 120 mA."+ }+ ],+ "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": 9,+ "cost_usd": 0.2505,+ "at": "2026-10-01T17:31:29"+ },+ "datasheet": {+ "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588882455986114560",+ "pages": 9,+ "sha256": "eab0a68adccc158e",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 20,+ "described": 20,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}