MCP4451-103E

{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp4451-103e",
  "title": "MCP4451-103E",
  "brief": "Microchip Tech Digital Potentiometers, TSSOP-20. 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",
    "data converters",
    "mcp4451-103e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MCP4451-103E",
    "manufacturer": "Microchip Tech",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Data Converters",
    "subcategory": "Digital Potentiometers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/db849d610d714455bbfc81058c4fb819.pdf",
    "parts": {
      "symbol": "mcp4451-103e.kicad_sym",
      "footprint": "mcp4451-103e.kicad_mod",
      "model_3d": "mcp4451-103e-hero.glb",
      "model_3d_plain": "mcp4451-103e-etched.glb",
      "model_3d_step": "mcp4451-103e-etched.step",
      "model_3d_step_plain": "mcp4451-103e.step",
      "lbr": "mcp4451-103e.lbr"
    },
    "distributor_links": {
      "lcsc": "C145613"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T03:13:17Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "P3A",
        "type": "passive",
        "description": "Potentiometer 3 Terminal A, the fixed full-scale connection (wiper 0x100 on 8-bit devices), voltage must be between VSS and VDD."
      },
      {
        "number": "2",
        "name": "P3W",
        "type": "passive",
        "description": "Potentiometer 3 wiper terminal, supports positive and negative current, voltage must be between VSS and VDD."
      },
      {
        "number": "3",
        "name": "P3B",
        "type": "passive",
        "description": "Potentiometer 3 Terminal B, the fixed zero-scale connection (wiper 0x00), voltage must be between VSS and VDD."
      },
      {
        "number": "4",
        "name": "HVC/A0",
        "type": "input",
        "description": "High Voltage Command / I2C Address 0 input (high-voltage tolerant with Schmitt trigger, smart weak pull-up); A0 is latched at POR/BOR and a normal vs high-voltage command is selected by VIHH."
      },
      {
        "number": "5",
        "name": "SCL",
        "type": "input",
        "description": "I2C clock input from the host controller (high-voltage tolerant with Schmitt trigger, no weak pull-up); the device is a slave and accepts only external clocks."
      },
      {
        "number": "6",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data I/O with open-drain N-channel output (high-voltage tolerant with Schmitt trigger, no weak pull-up)."
      },
      {
        "number": "7",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "8",
        "name": "P1B",
        "type": "passive",
        "description": "Potentiometer 1 Terminal B, the fixed zero-scale connection, voltage must be between VSS and VDD."
      },
      {
        "number": "9",
        "name": "P1W",
        "type": "passive",
        "description": "Potentiometer 1 wiper terminal, voltage must be between VSS and VDD."
      },
      {
        "number": "10",
        "name": "P1A",
        "type": "passive",
        "description": "Potentiometer 1 Terminal A, the fixed full-scale connection, voltage must be between VSS and VDD."
      },
      {
        "number": "11",
        "name": "P0A",
        "type": "passive",
        "description": "Potentiometer 0 Terminal A, the fixed full-scale connection, voltage must be between VSS and VDD."
      },
      {
        "number": "12",
        "name": "P0W",
        "type": "passive",
        "description": "Potentiometer 0 wiper terminal, voltage must be between VSS and VDD."
      },
      {
        "number": "13",
        "name": "P0B",
        "type": "passive",
        "description": "Potentiometer 0 Terminal B, the fixed zero-scale connection, voltage must be between VSS and VDD."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; datasheet states the pin is not used and should be connected to VDD or VSS."
      },
      {
        "number": "15",
        "name": "RESET",
        "type": "input",
        "description": "Hardware reset input (high-voltage tolerant with Schmitt trigger, weak pull-up) that forces the device into the POR/BOR state."
      },
      {
        "number": "16",
        "name": "A1",
        "type": "input",
        "description": "I2C Address 1 input (high-voltage tolerant with Schmitt trigger, smart pull-up) that with A0 allows up to 4 devices on one bus; should be tied static high or low."
      },
      {
        "number": "17",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive power supply input relative to VSS; device operates 1.8V to 5.5V with specifications guaranteed 2.7V to 5.5V."
      },
      {
        "number": "18",
        "name": "P2B",
        "type": "passive",
        "description": "Potentiometer 2 Terminal B, the fixed zero-scale connection, voltage must be between VSS and VDD."
      },
      {
        "number": "19",
        "name": "P2W",
        "type": "passive",
        "description": "Potentiometer 2 wiper terminal, voltage must be between VSS and VDD."
      },
      {
        "number": "20",
        "name": "P2A",
        "type": "passive",
        "description": "Potentiometer 2 Terminal A, the fixed full-scale connection, voltage must be between VSS and VDD."
      }
    ],
    "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: The MPN 'MCP4451-103E' has no package suffix in the text given (the marking example shows the TSSOP-"
        ],
        "pages_sent": 20,
        "cost_usd": 0.1764,
        "at": "2026-10-23T03:13:03"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/db849d610d714455bbfc81058c4fb819.pdf",
        "pages": 94,
        "sha256": "3e69021e45ebc441",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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    "models_3d": [
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        "file": "mcp4451-103e.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "TSSOP-20",
      "Category": "Data Converters",
      "Pins": "20"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "3e69021e45ebc441b27d9c34a89cb9d6e8c7e9106f38d1fb1dc0bcbece6db296",
      "rows": [
        {
          "name": "Nominal resistance RAB tolerance",
          "symbol": "RAB",
          "kind": "tolerance",
          "unit": "%",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "-103 devices (Note 1)",
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          "source": "datasheet"
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        {
          "name": "Nominal resistance (10k)",
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          "kind": "electrical",
          "unit": "kΩ",
          "min": 8,
          "typ": 10,
          "max": 12,
          "conditions": "-103 devices (Note 1)",
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        {
          "name": "Supply Voltage",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": null,
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          "conditions": "Device characteristics specified",
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          "name": "Supply Voltage (serial interface only)",
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          "min": 1.8,
          "typ": null,
          "max": 2.7,
          "conditions": "Serial Interface only",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Operating temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Operating Temperature Range",
          "source_page": 17,
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        {
          "name": "Specified temperature range",
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          "conditions": "",
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        },
        {
          "name": "HV pin voltage range",
          "symbol": "VHV",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 12.5,
          "conditions": "VDD ≥ 4.5V; VSS to 12.5V; VDD < 4.5V: VSS to VDD + 8.0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Resistor terminal input voltage range",
          "symbol": "VA,VW,VB",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "VSS to VDD (Note 5, Note 6)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Voltage on VDD wrt VSS",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.6,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Voltage on HVC/A0, A1, SCL, SDA, RESET wrt VSS",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.6,
          "typ": null,
          "max": 12.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Voltage on PxA, PxW, PxB wrt VSS",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "-0.3V to VDD + 0.3V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input clamp current",
          "symbol": "IIK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "VI < 0, VI > VDD, VI > VPP on HV pins",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Output clamp current",
          "symbol": "IOK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "VO < 0 or VO > VDD",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Max output current sunk by any output pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Max output current sourced by any output pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Max current out of VSS pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Max current into VDD pin",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Max current into PxA, PxW, PxB pins",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -2.5,
          "typ": null,
          "max": 2.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ambient temperature with power applied",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Soldering temperature of leads",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "10 seconds",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD protection (HBM)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "kV",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "all pins, HBM (MM 300V)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, 20L-TSSOP",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 90,
          "max": null,
          "conditions": "",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "VDD start voltage for 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 exit from Reset",
          "symbol": "TBORD",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": 10,
          "max": 20,
          "conditions": "VDD > VBOR",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply current, active 3.4 MHz",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 600,
          "conditions": "Serial interface active, HVC/A0 = VIH (or VIL), write all 0's to volatile Wiper 0, VDD = 5.5V, FSCL @ 3.4 MHz",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply current, active 100 kHz",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "Serial interface active, HVC/A0 = VIH (or VIL), write all 0's to volatile Wiper 0, VDD = 5.5V, FSCL @ 100 kHz",
          "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": "Stop condition, SCL = SDA = VIH, Wiper = 0, VDD = 5.5V, HVC/A0 = VIH",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Wiper resistance (5.5V)",
          "symbol": "RW",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 75,
          "max": 160,
          "conditions": "VDD = 5.5 V, IW = 2.0 mA, code = 00h",
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          "source": "datasheet"
        },
        {
          "name": "Wiper resistance (2.7V)",
          "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 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 = Midscale (80h or 40h)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Nominal resistance match (RAB)",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": 1.25,
          "conditions": "10 k, MCP44X1 devices only",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Nominal resistance match (RBW)",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.25,
          "max": 1.5,
          "conditions": "10 k, Code = Full Scale",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum current through A, W or B",
          "symbol": "IW",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 2.5,
          "conditions": "Terminal A IAW, W = Full Scale (FS)",
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          "source": "datasheet"
        },
        {
          "name": "Maximum RAB current",
          "symbol": "IAB",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.688,
          "conditions": "VB = 0V, VA = 5.5V, RAB(MIN) = 8000Ω",
          "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": "MCP44X1 PxA = PxW = PxB = VSS",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Full scale error",
          "symbol": "VWFSE",
          "kind": "electrical",
          "unit": "LSb",
          "min": -3.5,
          "typ": -0.1,
          "max": null,
          "conditions": "10 k 8-bit 3.0V ≤ VDD ≤ 5.5V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Zero scale error",
          "symbol": "VWZSE",
          "kind": "electrical",
          "unit": "LSb",
          "min": null,
          "typ": 0.1,
          "max": 3.5,
          "conditions": "10 k 8-bit 3.0V ≤ VDD ≤ 5.5V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Potentiometer INL",
          "symbol": "INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -1,
          "typ": 0.5,
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