component
MCP4351-104E
Public Made by Adomby adom
Microchip Tech Digital Potentiometers, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "mcp4351-104e",
"version": "0.1.0",
"type": "component",
"description": "Microchip Tech Digital Potentiometers, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"adc-dac-data conversion",
"mcp4351-104e",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
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"README.md",
"mcp4351-104e.kicad_sym",
"mcp4351-104e.kicad_mod",
"mcp4351-104e.glb",
"mcp4351-104e.step",
"mcp4351-104e.lbr",
"docs/hero.png",
"docs/mcp4351-104e-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"mcp4351-104e-hero.glb",
"mcp4351-104e-hero.overlay.json",
"mcp4351-104e-etched.glb"
],
"component": {
"mpn": "MCP4351-104E",
"manufacturer": "Microchip Tech",
"package": "QFN-20-EP(4x4)",
"pin_count": 21,
"category": "ADC/DAC/Data Conversion",
"subcategory": "Digital Potentiometers",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/95cf5d94dceb1b2a3b0688e3d6471ed2.pdf",
"parts": {
"symbol": "mcp4351-104e.kicad_sym",
"footprint": "mcp4351-104e.kicad_mod",
"model_3d": "mcp4351-104e-hero.glb",
"model_3d_plain": "mcp4351-104e-etched.glb",
"model_3d_step": "mcp4351-104e-etched.step",
"model_3d_step_plain": "mcp4351-104e.step",
"lbr": "mcp4351-104e.lbr"
},
"distributor_links": {
"lcsc": "C637724"
},
"distributor_check": {
"checked_at": "2026-10-30T21:03:33Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "P3B",
"type": "passive",
"description": "Potentiometer 3 terminal B, the zero-scale (wiper 0x00) connection; voltage must be between VSS and VDD and it carries current of either polarity."
},
{
"number": "2",
"name": "CS",
"type": "input",
"description": "SPI chip select input, high-voltage tolerant with Schmitt trigger; VIL enables serial commands and VIHH enables high-voltage serial commands."
},
{
"number": "3",
"name": "SCK",
"type": "input",
"description": "SPI serial clock input (input only, slave device), high-voltage tolerant with Schmitt trigger."
},
{
"number": "4",
"name": "SDI",
"type": "input",
"description": "SPI serial data input, connected to the host controller's SDO pin; high-voltage tolerant with Schmitt trigger."
},
{
"number": "5",
"name": "VSS",
"type": "power_in",
"description": "Device ground reference."
},
{
"number": "6",
"name": "P1B",
"type": "passive",
"description": "Potentiometer 1 terminal B, the zero-scale connection; voltage must be between VSS and VDD."
},
{
"number": "7",
"name": "P1W",
"type": "passive",
"description": "Potentiometer 1 wiper terminal; voltage must be between VSS and VDD."
},
{
"number": "8",
"name": "P1A",
"type": "passive",
"description": "Potentiometer 1 terminal A, the full-scale connection (0x100 for 8-bit); voltage must be between VSS and VDD."
},
{
"number": "9",
"name": "P0A",
"type": "passive",
"description": "Potentiometer 0 terminal A, the full-scale connection (0x100 for 8-bit); voltage must be between VSS and VDD."
},
{
"number": "10",
"name": "P0W",
"type": "passive",
"description": "Potentiometer 0 wiper terminal; voltage must be between VSS and VDD."
},
{
"number": "11",
"name": "P0B",
"type": "passive",
"description": "Potentiometer 0 terminal B, the zero-scale connection; voltage must be between VSS and VDD."
},
{
"number": "12",
"name": "NC",
"type": "unconnected",
"description": "No connect; the pin is not used."
},
{
"number": "13",
"name": "RESET",
"type": "input",
"description": "Hardware reset input that forces the device into the POR/BOR state; high-voltage tolerant with Schmitt trigger and weak pull-up."
},
{
"number": "14",
"name": "SDO",
"type": "output",
"description": "SPI serial data output, connected to the host controller's SDI pin, used to read registers or monitor the command error bit."
},
{
"number": "15",
"name": "VDD",
"type": "power_in",
"description": "Positive power supply input relative to VSS; specifications may not be met while VDD is below 2.7V, and a 0.1 µF bypass capacitor is recommended within 4 mm."
},
{
"number": "16",
"name": "P2B",
"type": "passive",
"description": "Potentiometer 2 terminal B, the zero-scale connection; voltage must be between VSS and VDD."
},
{
"number": "17",
"name": "P2W",
"type": "passive",
"description": "Potentiometer 2 wiper terminal; voltage must be between VSS and VDD."
},
{
"number": "18",
"name": "P2A",
"type": "passive",
"description": "Potentiometer 2 terminal A, the full-scale connection (0x100 for 8-bit); voltage must be between VSS and VDD."
},
{
"number": "19",
"name": "P3A",
"type": "passive",
"description": "Potentiometer 3 terminal A, the full-scale connection (0x100 for 8-bit); voltage must be between VSS and VDD."
},
{
"number": "20",
"name": "P3W",
"type": "passive",
"description": "Potentiometer 3 wiper terminal; voltage must be between VSS and VDD."
},
{
"number": "21",
"name": "EP",
"type": "passive",
"description": "Exposed thermal pad connected to the die substrate; tie to the same potential as VSS or leave unconnected, and it may serve as a heat sink."
}
],
"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: Datasheet text covers MCP433X/435X family; MCP4351-104E identified as 8-bit quad potentiometer, 100 ; EP is typed passive since it is tied to VSS or left unconnected; the datasheet does not assign it a "
],
"pages_sent": 20,
"cost_usd": 0.1421,
"at": "2026-10-30T21:03:25"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/95cf5d94dceb1b2a3b0688e3d6471ed2.pdf",
"pages": 88,
"sha256": "5666a7337dced900",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 21,
"described": 21,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4.0,
4.0,
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],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "mcp4351-104e-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
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]
}
}