MCP4451-104E

{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp4451-104e",
  "title": "MCP4451-104E",
  "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",
    "adc-dac-data conversion",
    "mcp4451-104e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MCP4451-104E",
    "manufacturer": "Microchip Tech",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "ADC/DAC/Data Conversion",
    "subcategory": "Digital Potentiometers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/db849d610d714455bbfc81058c4fb819.pdf",
    "parts": {
      "symbol": "mcp4451-104e.kicad_sym",
      "footprint": "mcp4451-104e.kicad_mod",
      "model_3d": "mcp4451-104e-hero.glb",
      "model_3d_plain": "mcp4451-104e-etched.glb",
      "model_3d_step": "mcp4451-104e-etched.step",
      "model_3d_step_plain": "mcp4451-104e.step",
      "lbr": "mcp4451-104e.lbr"
    },
    "distributor_links": {
      "lcsc": "C638704"
    },
    "distributor_check": {
      "checked_at": "2026-10-26T18:59:05Z",
      "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, which must be held between VSS and VDD."
      },
      {
        "number": "2",
        "name": "P3W",
        "type": "passive",
        "description": "Potentiometer 3 wiper terminal, which must be held between VSS and VDD."
      },
      {
        "number": "3",
        "name": "P3B",
        "type": "passive",
        "description": "Potentiometer 3 terminal B, the fixed zero-scale connection, which must be held between VSS and VDD."
      },
      {
        "number": "4",
        "name": "HVC/A0",
        "type": "input",
        "description": "High-voltage-tolerant Schmitt-trigger input with a smart pull-up that serves as I2C address bit 0 (latched at POR/BOR) and as the High Voltage Command pin when driven to VIHH."
      },
      {
        "number": "5",
        "name": "SCL",
        "type": "input",
        "description": "High-voltage-tolerant Schmitt-trigger I2C clock input from the host, supporting clock rates up to 100 kHz, 400 kHz and 3.4 MHz."
      },
      {
        "number": "6",
        "name": "SDA",
        "type": "bidirectional",
        "description": "High-voltage-tolerant I2C serial data pin with an open-drain N-channel output driver."
      },
      {
        "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, which must be held between VSS and VDD."
      },
      {
        "number": "9",
        "name": "P1W",
        "type": "passive",
        "description": "Potentiometer 1 wiper terminal, which must be held between VSS and VDD."
      },
      {
        "number": "10",
        "name": "P1A",
        "type": "passive",
        "description": "Potentiometer 1 terminal A, the fixed full-scale connection, which must be held between VSS and VDD."
      },
      {
        "number": "11",
        "name": "P0A",
        "type": "passive",
        "description": "Potentiometer 0 terminal A, the fixed full-scale connection, which must be held between VSS and VDD."
      },
      {
        "number": "12",
        "name": "P0W",
        "type": "passive",
        "description": "Potentiometer 0 wiper terminal, which must be held between VSS and VDD."
      },
      {
        "number": "13",
        "name": "P0B",
        "type": "passive",
        "description": "Potentiometer 0 terminal B, the fixed zero-scale connection, which must be held between VSS and VDD."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No-connect pin that is not used internally."
      },
      {
        "number": "15",
        "name": "RESET",
        "type": "input",
        "description": "High-voltage-tolerant Schmitt-trigger hardware reset input with weak pull-up that forces the device into the POR/BOR state."
      },
      {
        "number": "16",
        "name": "A1",
        "type": "input",
        "description": "High-voltage-tolerant Schmitt-trigger I2C address bit 1 input with smart pull-up, which should be tied static high or low."
      },
      {
        "number": "17",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive power supply input relative to VSS, with 1.8V to 5.5V device operation and 2.7V to 5.5V for specified characteristics."
      },
      {
        "number": "18",
        "name": "P2B",
        "type": "passive",
        "description": "Potentiometer 2 terminal B, the fixed zero-scale connection, which must be held between VSS and VDD."
      },
      {
        "number": "19",
        "name": "P2W",
        "type": "passive",
        "description": "Potentiometer 2 wiper terminal, which must be held between VSS and VDD."
      },
      {
        "number": "20",
        "name": "P2A",
        "type": "passive",
        "description": "Potentiometer 2 terminal A, the fixed full-scale connection, which must be held 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 'MCP4451-104E' has no package suffix; TSSOP-20 was taken from the package hint. The MCP4451 ; Datasheet is inconsistent for NC: Table 3-1 and section 3.8 say it is not used, while section 3.12 s; The Table 3-1 pin-number columns are run together in the extracted text. The TSSOP-20 numbers were m"
        ],
        "pages_sent": 20,
        "cost_usd": 0.1812,
        "at": "2026-10-26T18:58:50"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "mcp4451-104e.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": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mcp4451-104e-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
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        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c4d97995899af0ccc6142a3163deeebc6517299abeafe0be3221da3b4c660f8c",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "TSSOP-20",
      "Category": "ADC/DAC/Data Conversion",
      "Pins": "20"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "3e69021e45ebc441b27d9c34a89cb9d6e8c7e9106f38d1fb1dc0bcbece6db296",
      "rows": [
        {
          "name": "Nominal resistance RAB (-104)",
          "symbol": "RAB",
          "kind": "tolerance",
          "unit": "kΩ",
          "min": 80,
          "typ": 100,
          "max": 120,
          "conditions": "-104 devices (Note 1), ±20%",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage",
          "symbol": "VDD",
          "kind": "electrical",
          "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": "electrical",
          "unit": "V",
          "min": 1.8,
          "typ": null,
          "max": 2.7,
          "conditions": "Serial Interface only",
          "source_page": 4,
          "source": "datasheet"
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        {
          "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",
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        {
          "name": "Supply current, interface active 3.4 MHz",
          "symbol": "IDD",
          "kind": "electrical",
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          "min": null,
          "typ": null,
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          "conditions": "Serial Interface Active, VDD = 5.5V, FSCL @ 3.4 MHz",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Supply current, interface active 100 kHz",
          "symbol": "IDD",
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          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "Serial Interface Active, VDD = 5.5V, FSCL @ 100 kHz",
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          "source": "datasheet"
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        {
          "name": "Supply current, interface inactive",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2.5,
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          "conditions": "Stop condition, SCL = SDA = VIH, Wiper = 0, VDD = 5.5V, HVC/A0 = VIH",
          "source_page": 4,
          "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 reset exit",
          "symbol": "TBORD",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": 10,
          "max": 20,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Nominal resistance match",
          "symbol": "|RABWC - RABMEAN|/RABMEAN",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": 1,
          "conditions": "100 k, MCP44X1 devices only",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "RBW match",
          "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": "Full scale error 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 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, MCP44X1 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, MCP44X1 only (Note 2)",
          "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 (Note 7)",
          "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": "Power supply sensitivity 8-bit",
          "symbol": "PSS",
          "kind": "electrical",
          "unit": "%/%",
          "min": null,
          "typ": 0.0015,
          "max": 0.0035,
          "conditions": "VDD = 2.7V to 5.5V, VA = 2.7V, Code = 80h",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Input leakage current",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VIN = VDD (all pins) and VIN = VSS (all pins except RESET)",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Schmitt trigger high threshold (non SDA/SCL)",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 0.45,
          "typ": null,
          "max": null,
          "conditions": "0.45 VDD min, 2.7V ≤ VDD ≤ 5.5V, all inputs except SDA and SCL",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Schmitt trigger low threshold (non SDA/SCL)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "0.2 VDD max, all inputs except SDA and SCL",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Output low voltage SDA",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "VDD ≥ 2.0V, IOL = 3 mA",
          "source_page": 10,
          "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",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Maximum RAB current",
          "symbol": "IAB",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.069,
          "conditions": "VB = 0V, VA = 5.5V, RAB(MIN) = 80000Ω",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "RESET pulse width",
          "symbol": "tRST",
          "kind": "timing",
          "unit": "ns",
          "min": 50,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 12,
          "source": "datasheet"
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        {
          "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"
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        {
          "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"
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        {
          "name": "Bandwidth -3 dB",
          "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": "Operating temperature range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 17,
          "source": "datasheet"
        },
        {
          "name": "VDD voltage",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.6,
          "typ": null,
          "max": 7,
          "conditions": "with respect to VSS",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Voltage on HVC/A0, A1, SCL, SDA, RESET",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.6,
          "typ": null,
          "max": 12.5,
          "conditions": "with respect to VSS",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Voltage on PxA, PxW, PxB",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "-0.3V to VDD + 0.3V, with respect to VSS",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum current into PxA, PxW, PxB",
          "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": "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"
        }
      ]
    }
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  "discovery_pitch": "MCP4451-104E (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
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