component
NCN5121MNTWG
Public Made by Adomby adom
onsemi Interface - Specialized, QFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "ncn5121mntwg",
"version": "0.1.0",
"type": "component",
"description": "onsemi Interface - Specialized, QFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"interface",
"ncn5121mntwg",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"ncn5121mntwg.kicad_sym",
"ncn5121mntwg.kicad_mod",
"ncn5121mntwg.glb",
"ncn5121mntwg.step",
"ncn5121mntwg.lbr",
"docs/hero.png",
"docs/ncn5121mntwg-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"ncn5121mntwg-hero.glb",
"ncn5121mntwg-hero.overlay.json",
"ncn5121mntwg-etched.glb"
],
"component": {
"mpn": "NCN5121MNTWG",
"manufacturer": "onsemi",
"package": "QFN-40-EP(6x6)",
"pin_count": 41,
"category": "Interface",
"subcategory": "Interface - Specialized",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893088433778688",
"parts": {
"symbol": "ncn5121mntwg.kicad_sym",
"footprint": "ncn5121mntwg.kicad_mod",
"model_3d": "ncn5121mntwg-hero.glb",
"model_3d_plain": "ncn5121mntwg-etched.glb",
"model_3d_step": "ncn5121mntwg-etched.step",
"model_3d_step_plain": "ncn5121mntwg.step",
"lbr": "ncn5121mntwg.lbr"
},
"distributor_links": {
"lcsc": "C891972",
"digikey": "488-NCN5121MNTWGTR-ND",
"mouser": "863-NCN5121MNTWG"
},
"distributor_check": {
"checked_at": "2026-10-18T01:35:46Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "488-NCN5121MNTWGTR-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "863-NCN5121MNTWG",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "VSSA",
"type": "power_in",
"description": "Analog supply voltage ground."
},
{
"number": "2",
"name": "VBUS2",
"type": "power_in",
"description": "Ground for the KNX transmitter."
},
{
"number": "3",
"name": "TXO",
"type": "output",
"description": "KNX transmitter analog output (60 V rated pin, equivalent schematic Type 1)."
},
{
"number": "4",
"name": "CCP",
"type": "passive",
"description": "Analog I/O for the AC coupling external capacitor connection (60 V rated pin)."
},
{
"number": "5",
"name": "CAV",
"type": "passive",
"description": "Analog I/O for the capacitor connection to the average bus DC voltage (7 V rated pin)."
},
{
"number": "6",
"name": "VBUS1",
"type": "power_in",
"description": "KNX power supply input (60 V rated pin)."
},
{
"number": "7",
"name": "CEQ1",
"type": "passive",
"description": "Capacitor connection 1 for defining the equalization pulse (60 V rated pin)."
},
{
"number": "8",
"name": "CEQ2",
"type": "passive",
"description": "Capacitor connection 2 for defining the equalization pulse (60 V rated pin)."
},
{
"number": "9",
"name": "VFILT",
"type": "passive",
"description": "Filtered bus voltage supply pin (60 V rated pin)."
},
{
"number": "10",
"name": "V20V",
"type": "power_out",
"description": "20 V supply output from the 20 V LDO (60 V rated pin)."
},
{
"number": "11",
"name": "VDD2MV",
"type": "input",
"description": "Voltage monitor input of Voltage Regulator 2 (7 V rated pin)."
},
{
"number": "12",
"name": "VDD2MC",
"type": "input",
"description": "Current monitor input 1 of Voltage Regulator 2 (7 V rated pin)."
},
{
"number": "13",
"name": "VDD2",
"type": "input",
"description": "Current monitor input 2 of Voltage Regulator 2 (60 V rated pin)."
},
{
"number": "14",
"name": "VSS2",
"type": "power_in",
"description": "Voltage Regulator 2 ground."
},
{
"number": "15",
"name": "VSW2",
"type": "output",
"description": "Switch output of Voltage Regulator 2."
},
{
"number": "16",
"name": "VIN",
"type": "power_in",
"description": "Power supply input for Voltage Regulators 1 and 2 (60 V rated pin)."
},
{
"number": "17",
"name": "VSW1",
"type": "output",
"description": "Switch output of Voltage Regulator 1."
},
{
"number": "18",
"name": "VSS1",
"type": "power_in",
"description": "Voltage Regulator 1 ground."
},
{
"number": "19",
"name": "VDD1",
"type": "input",
"description": "Current input 2 and voltage monitor input of Voltage Regulator 1 (7 V rated pin)."
},
{
"number": "20",
"name": "VDD1M",
"type": "input",
"description": "Current monitor input 1 of Voltage Regulator 1 (7 V rated pin)."
},
{
"number": "21",
"name": "XCLKC",
"type": "input",
"description": "Digital input for clock frequency configuration."
},
{
"number": "22",
"name": "TRIG",
"type": "output",
"description": "Digital transmission trigger output."
},
{
"number": "23",
"name": "MODE1",
"type": "input",
"description": "Digital mode selection input 1."
},
{
"number": "24",
"name": "MODE2",
"type": "input",
"description": "Digital mode selection input 2."
},
{
"number": "25",
"name": "TREQ",
"type": "input",
"description": "Digital transmit request input."
},
{
"number": "26",
"name": "CSB/UC1",
"type": "bidirectional",
"description": "Chip select output (SPI), configuration input (UART) or 20 V LDO disable (analog mode), depending on MODE1/MODE2."
},
{
"number": "27",
"name": "SDI/RXD",
"type": "input",
"description": "Serial data input (SPI) or receive input (UART)."
},
{
"number": "28",
"name": "SDO/TXD",
"type": "output",
"description": "Serial data output (SPI) or transmit output (UART)."
},
{
"number": "29",
"name": "SCK/UC2",
"type": "bidirectional",
"description": "Serial clock output (SPI), configuration input (UART) or Voltage Regulator 2 disable (analog mode), depending on MODE1/MODE2."
},
{
"number": "30",
"name": "VDDD",
"type": "power_in",
"description": "Digital supply voltage input (7 V rated pin)."
},
{
"number": "31",
"name": "VSSD",
"type": "power_in",
"description": "Digital supply voltage ground."
},
{
"number": "32",
"name": "XCLK",
"type": "output",
"description": "Digital oscillator clock output."
},
{
"number": "33",
"name": "XSEL",
"type": "input",
"description": "Clock selection input (quartz or digital clock)."
},
{
"number": "34",
"name": "XTAL2",
"type": "bidirectional",
"description": "Clock generator output (quartz) or input (digital clock), selected by XSEL."
},
{
"number": "35",
"name": "XTAL1",
"type": "input",
"description": "Clock generator input (quartz)."
},
{
"number": "36",
"name": "SAVEB",
"type": "output",
"description": "Save signal, open drain with pull-up."
},
{
"number": "37",
"name": "RESETB",
"type": "output",
"description": "Reset signal, open drain with pull-up."
},
{
"number": "38",
"name": "FANIN",
"type": "input",
"description": "Fan-In digital input."
},
{
"number": "39",
"name": "ANAOUT",
"type": "output",
"description": "Analog signal output."
},
{
"number": "40",
"name": "VDDA",
"type": "power_in",
"description": "Analog supply voltage input (7 V rated pin)."
},
{
"number": "41",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"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 package has an exposed pad (EP) per the QFN40 6x6 drawing, but the datasheet text does not assig; The ordering suffix NTWG is not explicitly mapped to the MN package in the provided excerpt. The mar; ERC type for VFILT (pin 9) is a judgment call: the datasheet lists it only as 'Supply Type 5' with d",
"exposed pad 41 added from the footprint",
"2/41 pins cited to the wrong page (name found elsewhere): ['34:XTAL2@p3', '35:XTAL1@p3']"
],
"pages_sent": 10,
"cost_usd": 0.0754,
"at": "2026-10-18T01:33:42"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893088433778688",
"pages": 60,
"sha256": "76562040378f82b6",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 41,
"described": 41,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "ncn5121mntwg.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.0,
6.0,
1.0
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "e5b4286c2329085d9ef7f90d5eb5bf41a435241ecc1baaf1383823b6d6a946ae",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ncn5121mntwg-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.0,
6.0,
1.0
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "894f8ef3bf5fe6c98646075a7e9d0bd9ba0bc765d05ad3427446a57819ae561b",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}