MCP4351-104E

{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp4351-104e",
  "title": "MCP4351-104E",
  "brief": "Microchip Tech Digital Potentiometers, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "adc-dac-data conversion",
    "mcp4351-104e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "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": [
      {
        "file": "mcp4351-104e.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4,
          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 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",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "84cf50b940dd7ee54e05bd5fa1fa6cc8b8d43a91c03284436a1801627d354e14",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "QFN-20-EP(4x4)",
      "Category": "ADC/DAC/Data Conversion",
      "Pins": "21"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "5666a7337dced900f540cc83f7564a9bcb8d4726cdf69806359a636358ad6d15",
      "rows": [
        {
          "name": "Nominal Resistance (-104 devices)",
          "symbol": "RAB",
          "kind": "tolerance",
          "unit": "kΩ",
          "min": 80,
          "typ": 100,
          "max": 120,
          "conditions": "-104 devices (±20%)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (serial interface only)",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.8,
          "typ": null,
          "max": 2.7,
          "conditions": "Serial Interface only",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VDD start voltage to ensure wiper reset",
          "symbol": "VBOR",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.65,
          "conditions": "RAM retention voltage (VRAM) < VBOR",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Delay after device exits Reset state",
          "symbol": "TBORD",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": 10,
          "max": 20,
          "conditions": "VDD > VBOR",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply current, serial interface active",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 450,
          "conditions": "VDD = 5.5V, CS = VIL, SCK @ 5 MHz, write all 0's to volatile Wiper 0",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply current, serial interface inactive",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2.5,
          "max": 5,
          "conditions": "CS = VIH, VDD = 5.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply current, high-voltage active",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.55,
          "max": 1,
          "conditions": "VDD = 5.5V, CS = VIHH, SCK @ 5 MHz, decrement volatile Wiper 0",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Wiper resistance",
          "symbol": "RW",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 75,
          "max": 160,
          "conditions": "VDD = 5.5 V, IW = 2.0 mA, code = 00h",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Wiper resistance",
          "symbol": "RW",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 75,
          "max": 300,
          "conditions": "VDD = 2.7 V, IW = 2.0 mA, code = 00h",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Nominal resistance match (100k)",
          "symbol": "|RABWC - RABMEAN|/RABMEAN",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": 1,
          "conditions": "100 k, MCP43X1 devices only",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Resistance match RBW (100k)",
          "symbol": "|RBWWC - RBWMEAN|/RBWMEAN",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.25,
          "max": 1.25,
          "conditions": "100 k, Code = Full Scale",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Nominal resistance tempco",
          "symbol": "ΔRAB/ΔT",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "TA = -20°C to +70°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Nominal resistance tempco",
          "symbol": "ΔRAB/ΔT",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "TA = -40°C to +85°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Nominal resistance tempco",
          "symbol": "ΔRAB/ΔT",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "TA = -40°C to +125°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Ratiometric tempco",
          "symbol": "ΔVWB/ΔT",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": null,
          "typ": 15,
          "max": null,
          "conditions": "Code = Mid-scale (80h or 40h)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Resistor terminal input voltage range",
          "symbol": "VA,VW,VB",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 5.5,
          "conditions": "Vss to VDD; Note 5, Note 6",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Maximum current through A, W or B",
          "symbol": "IW",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 2.5,
          "conditions": "Worst case current through wiper at Full/Zero Scale",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Leakage current into A, W or B",
          "symbol": "IWL",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "MCP43X1 PxA = PxW = PxB = VSS",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Full scale error (100k 8-bit)",
          "symbol": "VWFSE",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": -0.1,
          "max": null,
          "conditions": "100 k 8-bit, 3.0V ≤ VDD ≤ 5.5V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Zero scale error (100k 8-bit)",
          "symbol": "VWZSE",
          "kind": "electrical",
          "unit": "LSb",
          "min": null,
          "typ": 0.1,
          "max": 0.5,
          "conditions": "100 k 8-bit, 3.0V ≤ VDD ≤ 5.5V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Potentiometer INL (8-bit)",
          "symbol": "INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -1,
          "typ": 0.5,
          "max": 1,
          "conditions": "8-bit 3.0V ≤ VDD ≤ 5.5V, MCP43X1 only (Note 2)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Potentiometer DNL (8-bit)",
          "symbol": "DNL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "8-bit 3.0V ≤ VDD ≤ 5.5V, MCP43X1 only (Note 2)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Bandwidth -3 dB (100k 8-bit)",
          "symbol": "BW",
          "kind": "electrical",
          "unit": "kHz",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "100 k 8-bit, Code = 80h, load = 30 pF",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Rheostat INL (100k 8-bit)",
          "symbol": "R-INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -1,
          "typ": 0.5,
          "max": 1,
          "conditions": "100 k 8-bit, 5.5V, IW = 45 µA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Rheostat INL (100k 8-bit)",
          "symbol": "R-INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -1.5,
          "typ": 0.25,
          "max": 1.5,
          "conditions": "100 k 8-bit, 3.0V, IW = 24 µA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Rheostat DNL (100k 8-bit)",
          "symbol": "R-DNL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "100 k 8-bit, 5.5V, IW = 45 µA",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Capacitance (PA)",
          "symbol": "CAW",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 75,
          "max": null,
          "conditions": "f =1 MHz, Code = Full Scale",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Capacitance (PW)",
          "symbol": "CW",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 120,
          "max": null,
          "conditions": "f =1 MHz, Code = Full Scale",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Capacitance (PB)",
          "symbol": "CBW",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 75,
          "max": null,
          "conditions": "f =1 MHz, Code = Full Scale",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Schmitt trigger high input threshold",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 0.45,
          "typ": null,
          "max": null,
          "conditions": "2.7V ≤ VDD ≤ 5.5V (min is 0.45 VDD)",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Schmitt trigger high input threshold",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 0.5,
          "typ": null,
          "max": null,
          "conditions": "1.8V ≤ VDD ≤ 2.7V (min is 0.5 VDD)",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Schmitt trigger low input threshold",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "max is 0.2VDD",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "High voltage input entry voltage",
          "symbol": "VIHH",
          "kind": "electrical",
          "unit": "V",
          "min": 8.5,
          "typ": null,
          "max": 12.5,
          "conditions": "Note 6",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "High voltage limit",
          "symbol": "VMAX",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 12.5,
          "conditions": "Pin can tolerate VMAX or less",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Output low voltage (SDO)",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 0.3,
          "conditions": "IOL = 5 mA, VDD = 5.5V (max is 0.3VDD)",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Output high voltage (SDO)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 0.7,
          "typ": null,
          "max": null,
          "conditions": "IOH = -2.5 mA, VDD = 5.5V (min is 0.7VDD)",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Weak pull-up current",
          "symbol": "IPU",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1.75,
          "conditions": "Internal VDD pull-up, VIHH pull-down, VDD = 5.5V, VCS = 12.5V",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Weak pull-up current CS pin",
          "symbol": "IPU",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 170,
          "max": null,
          "conditions": "CS pin, VDD = 5.5V, VCS = 3V",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "CS pull-up/pull-down resistance",
          "symbol": "RCS",
          "kind": "electrical",
          "unit": "kΩ",
          "min": null,
          "typ": 16,
          "max": null,
          "conditions": "VDD = 5.5V, VCS = 3V",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "RESET pull-up resistance",
          "symbol": "RRESET",
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