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CH454S
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WCH(Jiangsu Qin Heng) LED Display Drivers, SOP-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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{
"schema_version": 1,
"type": "component",
"slug": "ch454s",
"title": "CH454S",
"brief": "WCH(Jiangsu Qin Heng) LED Display Drivers, SOP-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
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"display modules - led drivers - display drivers",
"ch454s",
"factory-2.0.0",
"extractor-text"
],
"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": {
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"distributor_links": {
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},
"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",
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"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",
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},
{
"number": "25",
"name": "XSG4",
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"description": "Extension segment drive of LED Nixie tube, active at high level, or general-purpose I/O with built-in weak pull-up resistor."
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{
"number": "26",
"name": "XSG5",
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"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",
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"description": "Open-drain data input and output of 2-wire serial interface, with built-in pull-up resistor."
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{
"number": "28",
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],
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"at": "2026-10-31T06:42:32"
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"metadata": {
"specs": {
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"Package": "SOP-28-300mil",
"Category": "Display Modules / LED Drivers / Display Drivers",
"Pins": "28"
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{
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{
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"conditions": "(-120mA)",
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{
"name": "High level output voltage of DIG pin",
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"source": "datasheet"
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{
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{
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{
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{
"name": "Input pull-down current of SEG pin",
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{
"name": "Input pull-down current of RSTI pin",
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{
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"unit": "uA",
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"max": 300,
"conditions": "TA=25℃, VCC=5V",
"source_page": 11,
"source": "datasheet"
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{
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"conditions": "TA=25℃, VCC=5V",
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{
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"kind": "electrical",
"unit": "uA",
"min": 60,
"typ": 100,
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"conditions": "TA=25℃, VCC=5V",
"source_page": 11,
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{
"name": "Output pull-up current of INT# pin",
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"kind": "electrical",
"unit": "uA",
"min": 500,
"typ": 3500,
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"conditions": "TA=25℃, VCC=5V",
"source_page": 11,
"source": "datasheet"
},
{
"name": "Default voltage threshold of power on reset",
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"unit": "V",
"min": 2,
"typ": 2.3,
"max": 2.7,
"conditions": "TA=25℃, VCC=5V",
"source_page": 11,
"source": "datasheet"
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{
"name": "Power on reset time of power supply",
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"kind": "timing",
"unit": "mS",
"min": 3,
"typ": 10,
"max": 50,
"conditions": "TA=25℃, VCC=5V",
"source_page": 11,
"source": "datasheet"
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{
"name": "Time between receiving sleep command and start of sleep",
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"min": 8,
"typ": 20,
"max": 60,
"conditions": "TA=25℃, VCC=5V",
"source_page": 11,
"source": "datasheet"
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{
"name": "Time to be awakened to resume work during sleep",
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"min": 10,
"typ": 100,
"max": 200,
"conditions": "TA=25℃, VCC=5V",
"source_page": 11,
"source": "datasheet"
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{
"name": "Ambient temperature during operation",
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"typ": null,
"max": 85,
"conditions": "",
"source_page": 10,
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{
"name": "Ambient temperature during storage",
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"kind": "absolute_maximum",
"unit": "℃",
"min": -55,
"typ": null,
"max": 125,
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"source_page": 10,
"source": "datasheet"
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{
"name": "Supply voltage",
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"min": -0.5,
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"max": 6,
"conditions": "VCC connects to power, GND to ground",
"source_page": 10,
"source": "datasheet"
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{
"name": "Voltage on the input or output pins",
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"unit": "V",
"min": -0.5,
"typ": null,
"max": null,
"conditions": "max printed as VCC+0.5",
"source_page": 11,
"source": "datasheet"
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{
"name": "Continuous drive current of single DIG pin",
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"unit": "mA",
"min": 0,
"typ": null,
"max": 200,
"conditions": "",
"source_page": 11,
"source": "datasheet"
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{
"name": "Continuous drive current of single SEG pin",
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"min": 0,
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{
"name": "Total continuous drive current of all SEG pins",
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{
"name": "5V low power sleep current",
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"unit": "mA",
"min": null,
"typ": 0.08,
"max": null,
"conditions": "all I/O suspended",
"source_page": 11,
"source": "datasheet"
},
{
"name": "3.3V low power sleep current",
"symbol": "Islp3",
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"unit": "mA",
"min": null,
"typ": 0.03,
"max": null,
"conditions": "all I/O suspended",
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}
]
}
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