component
CH446X
Public Made by Adomby adom
WCH(南京沁恒) Analog Switches, Multiplexers, LQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"type": "component",
"slug": "ch446x",
"title": "CH446X",
"brief": "WCH(南京沁恒) Analog Switches, Multiplexers, LQFP-44(10x10). 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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"interface",
"ch446x",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "CH446X",
"manufacturer": "WCH(南京沁恒)",
"package": "LQFP-44(10x10)",
"pin_count": 44,
"category": "Interface",
"subcategory": "Analog Switches, Multiplexers",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589040402330894336",
"parts": {
"symbol": "ch446x.kicad_sym",
"footprint": "ch446x.kicad_mod",
"model_3d": "ch446x-hero.glb",
"model_3d_plain": "ch446x-etched.glb",
"model_3d_step": "ch446x-etched.step",
"model_3d_step_plain": "ch446x.step",
"lbr": "ch446x.lbr"
},
"distributor_links": {
"lcsc": "C3018882"
},
"distributor_check": {
"checked_at": "2026-10-20T21:27:35Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "38",
"name": "VDD",
"type": "power_in",
"description": "Positive supply; voltage must be greater than or equal to GND."
},
{
"number": "12",
"name": "GND",
"type": "power_in",
"description": "Common ground and digital signal reference, 0 V."
},
{
"number": "16",
"name": "VEE",
"type": "power_in",
"description": "Negative supply; voltage must be less than or equal to GND."
},
{
"number": "41",
"name": "RST",
"type": "input",
"description": "External manual reset input, active high; a high level clears all latches to 0 so all analog switches are open."
},
{
"number": "36",
"name": "DAT",
"type": "input",
"description": "Serial data input and switch data input; when used as switch data, high turns the switch on and low turns it off."
},
{
"number": "14",
"name": "STB",
"type": "input",
"description": "Strobe input, active high; its high pulse generates the ACT pulse that writes DAT into the latch selected by the address."
},
{
"number": "34",
"name": "CS/CK",
"type": "input",
"description": "Serial clock input, active on the rising edge; seven rising edges shift in the 7-bit address."
},
{
"number": "31",
"name": "X0",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "30",
"name": "X1",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "29",
"name": "X2",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "28",
"name": "X3",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "27",
"name": "X4",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "26",
"name": "X5",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "3",
"name": "X6",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "4",
"name": "X7",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "5",
"name": "X8",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "6",
"name": "X9",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "7",
"name": "X10",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "8",
"name": "X11",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "25",
"name": "X12",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "24",
"name": "X13",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "1",
"name": "X14",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "2",
"name": "X15",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "33",
"name": "X16",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "35",
"name": "X17",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "37",
"name": "X18",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "39",
"name": "X19",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "17",
"name": "X20",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "15",
"name": "X21",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "13",
"name": "X22",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "11",
"name": "X23",
"type": "passive",
"description": "Analog signal input/output, X port of the 5x24 switch matrix."
},
{
"number": "43",
"name": "Y0",
"type": "passive",
"description": "Analog signal input/output, Y port of the 5x24 switch matrix."
},
{
"number": "18",
"name": "Y1",
"type": "passive",
"description": "Analog signal input/output, Y port of the 5x24 switch matrix."
},
{
"number": "19",
"name": "Y2",
"type": "passive",
"description": "Analog signal input/output, Y port of the 5x24 switch matrix."
},
{
"number": "42",
"name": "Y3",
"type": "passive",
"description": "Analog signal input/output, Y port of the 5x24 switch matrix."
},
{
"number": "20",
"name": "Y4",
"type": "passive",
"description": "Analog signal input/output, Y port of the 5x24 switch matrix."
},
{
"number": "9",
"name": "NC",
"type": "unconnected",
"description": "Unused pin; must not be connected."
},
{
"number": "10",
"name": "NC",
"type": "unconnected",
"description": "Unused pin; must not be connected."
},
{
"number": "21",
"name": "NC",
"type": "unconnected",
"description": "Unused pin; must not be connected."
},
{
"number": "40",
"name": "NC",
"type": "unconnected",
"description": "Unused pin; must not be connected."
},
{
"number": "22",
"name": "NC",
"type": "unconnected",
"description": "Unused pin; must not be connected."
},
{
"number": "23",
"name": "NC",
"type": "unconnected",
"description": "Unused pin; must not be connected."
},
{
"number": "32",
"name": "NC",
"type": "unconnected",
"description": "Unused pin; must not be connected."
},
{
"number": "44",
"name": "NC",
"type": "unconnected",
"description": "Unused pin; must not be connected."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
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"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The datasheet lists the X0～X23 pin numbers as a grouped list without an explicit per-pin mapping. Th; The datasheet lists the Y0～Y4 pin numbers as a grouped list without an explicit per-pin mapping. The; The datasheet does not give a KiCad electrical type for VDD and VEE; power_in was assigned because t"
],
"pages_sent": 9,
"cost_usd": 0.0733,
"at": "2026-10-20T21:23:43"
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"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 44,
"described": 44,
"cites_pages": true,
"refuses_to_fabricate": true
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"metadata": {
"specs": {
"Manufacturer": "WCH(南京沁恒)",
"Package": "LQFP-44(10x10)",
"Category": "Interface",
"Pins": "44"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "a9328434d05a60801c45c2e7b7b35eeb99deb6e8fb593eaa5d6ae89b02a55d21",
"rows": [
{
"name": "Operating ambient temperature (absolute maximum table)",
"symbol": "TA",
"kind": "absolute_maximum",
"unit": "℃",
"min": -40,
"typ": null,
"max": 85,
"conditions": "",
"source_page": 6,
"source": "datasheet"
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{
"name": "Storage ambient temperature (absolute maximum table)",
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"unit": "℃",
"min": -55,
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"source_page": 6,
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{
"name": "VDD supply voltage (absolute maximum)",
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"min": -0.5,
"typ": null,
"max": 16,
"conditions": "VEE=GND=0V",
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"source": "datasheet"
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{
"name": "VEE supply voltage (absolute maximum)",
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{
"name": "Continuous current per analog switch",
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"source": "datasheet"
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{
"name": "Sum of continuous current, all analog switches",
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"kind": "absolute_maximum",
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"min": 0,
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{
"name": "VDD supply voltage (recommended)",
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"kind": "recommended_operating",
"unit": "V",
"min": 4,
"typ": null,
"max": 13.2,
"conditions": "GND=0V, VDD-VEE less than 13.2V",
"source_page": 6,
"source": "datasheet"
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{
"name": "VEE supply voltage (recommended)",
"symbol": "VEE",
"kind": "recommended_operating",
"unit": "V",
"min": -8.8,
"typ": null,
"max": 0,
"conditions": "",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Quiescent supply current, all digital pins at VDD or GND",
"symbol": "ICC0",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 1,
"max": 100,
"conditions": "TA=25℃, VDD=12V, GND=0V, VEE=0V, switch voltage 0.4V",
"source_page": 6,
"source": "datasheet"
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{
"name": "Quiescent supply current, VDD=5V",
"symbol": "ICC5",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.4,
"max": 1.5,
"conditions": "TA=25℃, VDD=5V, all digital pins",
"source_page": 6,
"source": "datasheet"
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{
"name": "Quiescent supply current, all digital pins",
"symbol": "ICC12",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 5,
"max": 15,
"conditions": "TA=25℃, VDD=12V, GND=0V, VEE=0V, switch voltage 0.4V",
"source_page": 6,
"source": "datasheet"
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{
"name": "Digital input low-level voltage, VDD-GND=5V",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 0.8,
"conditions": "VDD-GND=5V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Digital input high-level voltage, VDD-GND=5V",
"symbol": "VIH",
"kind": "electrical",
"unit": "V",
"min": 2,
"typ": null,
"max": null,
"conditions": "VDD-GND=5V",
"source_page": 6,
"source": "datasheet"
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{
"name": "Digital input high-level voltage",
"symbol": "VIH12",
"kind": "electrical",
"unit": "V",
"min": 3.3,
"typ": null,
"max": null,
"conditions": "TA=25℃, VDD=12V, GND=0V, VEE=0V, switch voltage 0.4V",
"source_page": 6,
"source": "datasheet"
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{
"name": "Digital pin input leakage current",
"symbol": "ILEAK",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 0.1,
"max": 10,
"conditions": "TA=25℃, VDD=12V, GND=0V, VEE=0V, switch voltage 0.4V",
"source_page": 6,
"source": "datasheet"
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{
"name": "Analog switch leakage current, switch off",
"symbol": "IOFF",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": 1,
"max": 500,
"conditions": "TA=25℃, VDD=12V, GND=0V, VEE=0V, switch voltage 0.4V; printed as ±1 and ±500",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Analog switch on-resistance, 25℃",
"symbol": "RON12",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 45,
"max": 65,
"conditions": "VDD-VEE=12V, 25℃",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Analog switch on-resistance, 85℃",
"symbol": "RON12T",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 55,
"max": 80,
"conditions": "VDD-VEE=12V, 85℃",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Analog switch on-resistance, 25℃",
"symbol": "RON5",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 120,
"max": 185,
"conditions": "VDD-VEE=5V, 25℃",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Analog switch on-resistance, 85℃",
"symbol": "RON5T",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 150,
"max": 225,
"conditions": "VDD-VEE=5V, 85℃",
"source_page": 6,
"source": "datasheet"
},
{
"name": "On-resistance difference between switches",
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"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 5,
"max": 10,
"conditions": "VDD-VEE=12V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Analog switch port pin capacitance",
"symbol": "CSW",
"kind": "electrical",
"unit": "pF",
"min": null,
"typ": 10,
"max": 25,
"conditions": "F=1MHz",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Analog switch feedthrough capacitance",
"symbol": "CFT",
"kind": "electrical",
"unit": "pF",
"min": null,
"typ": 0.5,
"max": null,
"conditions": "F=1MHz",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Analog switch frequency response, 3dB",
"symbol": "F3DB",
"kind": "timing",
"unit": "MHz",
"min": null,
"typ": 50,
"max": null,
"conditions": "RL=3kΩ",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Analog switch signal propagation delay",
"symbol": "TPS",
"kind": "timing",
"unit": "nS",
"min": null,
"typ": 12,
"max": 30,
"conditions": "RL=1KΩ, CL=50pF",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Digital data input pin capacitance",
"symbol": "CDI",
"kind": "electrical",
"unit": "pF",
"min": null,
"typ": 7,
"max": 15,
"conditions": "F=1MHz",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Parallel address setup time to STB rising edge",
"symbol": "TPAS",
"kind": "timing",
"unit": "nS",
"min": 8,
"typ": null,
"max": null,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Parallel address hold time after STB falling edge",
"symbol": "TPAH",
"kind": "timing",
"unit": "nS",
"min": 6,
"typ": null,
"max": null,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "DAT address setup time to CS/CK rising edge",
"symbol": "TAS",
"kind": "timing",
"unit": "nS",
"min": 7,
"typ": null,
"max": null,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
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