component
CH454S
Public Made by Adomby adom
WCH(Jiangsu Qin Heng) LED Display Drivers, SOP-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
Ray
Publish 0.1.0
13ec17c
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{
"slug": "ch454s",
"version": "0.1.0",
"type": "component",
"description": "WCH(Jiangsu Qin Heng) LED Display Drivers, SOP-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"display modules - led drivers - display drivers",
"ch454s",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"ch454s.kicad_sym",
"ch454s.kicad_mod",
"ch454s.glb",
"ch454s.step",
"ch454s.lbr",
"docs/hero.png",
"docs/ch454s-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"ch454s-hero.glb",
"ch454s-hero.overlay.json",
"ch454s-etched.glb"
],
"component": {
"mpn": "CH454S",
"manufacturer": "WCH(Jiangsu Qin Heng)",
"package": "SOP-28-300mil",
"pin_count": 28,
"category": "Display Modules / LED Drivers / Display Drivers",
"subcategory": "LED Display Drivers",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/8d09c02cd96fd8f3ce131ebd81970dad.pdf",
"parts": {
"symbol": "ch454s.kicad_sym",
"footprint": "ch454s.kicad_mod",
"model_3d": "ch454s-hero.glb",
"model_3d_plain": "ch454s-etched.glb",
"model_3d_step": "ch454s-etched.step",
"model_3d_step_plain": "ch454s.step",
"lbr": "ch454s.lbr"
},
"distributor_links": {
"lcsc": "C111671"
},
"distributor_check": {
"checked_at": "2026-10-31T06:42:45Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "DIG7",
"type": "output",
"description": "Word drive of LED Nixie tube, active at low level; also keyboard scan output and doubles as the segment 17 driver."
},
{
"number": "2",
"name": "DIG6",
"type": "output",
"description": "Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level."
},
{
"number": "3",
"name": "DIG5",
"type": "output",
"description": "Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level."
},
{
"number": "4",
"name": "DIG4",
"type": "output",
"description": "Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level."
},
{
"number": "5",
"name": "DIG3",
"type": "output",
"description": "Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level."
},
{
"number": "6",
"name": "DIG2",
"type": "output",
"description": "Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level."
},
{
"number": "7",
"name": "DIG1",
"type": "output",
"description": "Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level."
},
{
"number": "8",
"name": "DIG0",
"type": "output",
"description": "Word drive of LED Nixie tube, active at low level; also keyboard scan output, active at high level."
},
{
"number": "9",
"name": "GND",
"type": "power_in",
"description": "Common ground, continuous current not less than 150mA."
},
{
"number": "10",
"name": "XSG0",
"type": "bidirectional",
"description": "Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor."
},
{
"number": "11",
"name": "XSG1",
"type": "bidirectional",
"description": "Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor."
},
{
"number": "12",
"name": "XSG2",
"type": "bidirectional",
"description": "Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor."
},
{
"number": "13",
"name": "XSG3",
"type": "bidirectional",
"description": "Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor."
},
{
"number": "14",
"name": "XSG6",
"type": "bidirectional",
"description": "Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor."
},
{
"number": "15",
"name": "XSG7",
"type": "bidirectional",
"description": "Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor."
},
{
"number": "16",
"name": "SEG0",
"type": "bidirectional",
"description": "Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor."
},
{
"number": "17",
"name": "SEG1",
"type": "bidirectional",
"description": "Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor."
},
{
"number": "18",
"name": "SEG2",
"type": "bidirectional",
"description": "Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor."
},
{
"number": "19",
"name": "SEG3",
"type": "bidirectional",
"description": "Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor."
},
{
"number": "20",
"name": "SEG4",
"type": "bidirectional",
"description": "Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor."
},
{
"number": "21",
"name": "SEG5",
"type": "bidirectional",
"description": "Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor."
},
{
"number": "22",
"name": "SEG6",
"type": "bidirectional",
"description": "Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor."
},
{
"number": "23",
"name": "SEG7",
"type": "bidirectional",
"description": "Segment drive of LED Nixie tube, active at high level; also keyboard scan input, active at high level, with built-in pull-down resistor."
},
{
"number": "24",
"name": "VCC",
"type": "power_in",
"description": "Positive power supply, continuous current not less than 150mA."
},
{
"number": "25",
"name": "XSG4",
"type": "bidirectional",
"description": "Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor."
},
{
"number": "26",
"name": "XSG5",
"type": "bidirectional",
"description": "Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor."
},
{
"number": "27",
"name": "SDA",
"type": "bidirectional",
"description": "Open-drain data input and output of 2-wire serial interface, with built-in pull-up resistor."
},
{
"number": "28",
"name": "SCL",
"type": "input",
"description": "Data clock of two-wire serial interface, with built-in pull-up resistor."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: SEG and XSG pins are listed as three-state output and input; mapped to bidirectional. DIG pin-number",
"16/28 pins cited to the wrong page (name found elsewhere): ['3:DIG5@p2', '4:DIG4@p2', '6:DIG2@p2', '7:DIG1@p2']"
],
"pages_sent": 6,
"cost_usd": 0.1197,
"at": "2026-10-31T06:42:32"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/8d09c02cd96fd8f3ce131ebd81970dad.pdf",
"pages": 16,
"sha256": "b9c43ce7c021be93",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 28,
"described": 28,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "ch454s.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
11.636,
18.16,
2.666
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "ecc34510e8f74b6103a72c2f24133ad80006c738972a56531d1221b277fcecdb",
"checked": "2026-10-31",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ch454s-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
11.636,
18.16,
2.666
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "822468749b535f604b4b7ac71ca86c1e7afd88cb53de47edef7df73ca22e9744",
"checked": "2026-10-31",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
],
"package_dims": {
"package_code": "SOP28",
"source_page": 2,
"e": {
"nom_mm": 1.27,
"range_mm": [
null,
null
]
},
"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
"model_check": {
"file": "ch454s.step",
"verdict": "SKIP",
"reasons": [
"the datasheet dimensions give no height or body size to compare"
],
"by": "factory/package_fit.py"
}
}
}
}