MCP4451T-503E

{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp4451t-503e",
  "title": "MCP4451T-503E",
  "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 acquisition",
    "mcp4451t-503e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MCP4451T-503E",
    "manufacturer": "Microchip Tech",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Data Acquisition",
    "subcategory": "Digital Potentiometers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/db849d610d714455bbfc81058c4fb819.pdf",
    "parts": {
      "symbol": "mcp4451t-503e.kicad_sym",
      "footprint": "mcp4451t-503e.kicad_mod",
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      "model_3d_plain": "mcp4451t-503e-etched.glb",
      "model_3d_step": "mcp4451t-503e-etched.step",
      "model_3d_step_plain": "mcp4451t-503e.step",
      "lbr": "mcp4451t-503e.lbr"
    },
    "distributor_links": {
      "lcsc": "C627257"
    },
    "distributor_check": {
      "checked_at": "2026-10-16T21:31:17Z",
      "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 full-scale end of resistor network 3, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "2",
        "name": "P3W",
        "type": "passive",
        "description": "Potentiometer 3 wiper terminal, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "3",
        "name": "P3B",
        "type": "passive",
        "description": "Potentiometer 3 terminal B, the zero-scale end of resistor network 3, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "4",
        "name": "HVC/A0",
        "type": "input",
        "description": "Multiplexed High Voltage Command and I2C Address 0 input, latched at POR/BOR; it is high-voltage tolerant with a Schmitt trigger and has an internal pull-up."
      },
      {
        "number": "5",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input, high-voltage tolerant with Schmitt trigger, which accepts only external clock signals since the device is a slave and does not stretch the clock."
      },
      {
        "number": "6",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data I/O, an open-drain N-channel driver that is high-voltage tolerant with Schmitt trigger input."
      },
      {
        "number": "7",
        "name": "VSS",
        "type": "power_in",
        "description": "Device ground reference, to which the VDD input supply is relative."
      },
      {
        "number": "8",
        "name": "P1B",
        "type": "passive",
        "description": "Potentiometer 1 terminal B, the zero-scale end of resistor network 1, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "9",
        "name": "P1W",
        "type": "passive",
        "description": "Potentiometer 1 wiper terminal, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "10",
        "name": "P1A",
        "type": "passive",
        "description": "Potentiometer 1 terminal A, the full-scale end of resistor network 1, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "11",
        "name": "P0A",
        "type": "passive",
        "description": "Potentiometer 0 terminal A, the full-scale end of resistor network 0, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "12",
        "name": "P0W",
        "type": "passive",
        "description": "Potentiometer 0 wiper terminal, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "13",
        "name": "P0B",
        "type": "passive",
        "description": "Potentiometer 0 terminal B, the zero-scale end of resistor network 0, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect pin that is not used; the datasheet says it should be connected to either VDD or VSS."
      },
      {
        "number": "15",
        "name": "RESET",
        "type": "input",
        "description": "Hardware reset input, high-voltage tolerant with Schmitt trigger, which 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, which should be static and tied high or low."
      },
      {
        "number": "17",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive power supply input relative to VSS; electrical performance may not meet data sheet specifications while VDD is below 2.7V."
      },
      {
        "number": "18",
        "name": "P2B",
        "type": "passive",
        "description": "Potentiometer 2 terminal B, the zero-scale end of resistor network 2, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "19",
        "name": "P2W",
        "type": "passive",
        "description": "Potentiometer 2 wiper terminal, which must stay between VSS and VDD and can carry positive or negative current."
      },
      {
        "number": "20",
        "name": "P2A",
        "type": "passive",
        "description": "Potentiometer 2 terminal A, the full-scale end of resistor network 2, which must stay between VSS and VDD and can carry positive or negative current."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "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 MPN suffix T denotes tape-and-reel ordering only; the datasheet gives no separate pinout for the"
        ],
        "pages_sent": 20,
        "cost_usd": 0.0618,
        "at": "2026-10-16T21:30:53"
      },
      "datasheet": {
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        "pages": 94,
        "sha256": "3e69021e45ebc441",
        "source_tier": "mfr"
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      "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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        "role": "plain",
        "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,
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      },
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "TSSOP-20",
      "Category": "Data Acquisition",
      "Pins": "20"
    },
    "characteristics": {
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        {
          "name": "Storage Temperature",
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        {
          "name": "Input clamp current",
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          "conditions": "VI < 0, VI > VDD, VI > VPP ON HV pins",
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          "conditions": "VO < 0 or VO > VDD",
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        {
          "name": "Maximum output current sunk by any Output pin",
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          "name": "Maximum current into VDD pin",
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        {
          "name": "Maximum current out of VSS pin",
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        {
          "name": "Maximum Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
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        {
          "name": "ESD protection on all pins (HBM)",
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          "kind": "absolute_maximum",
          "unit": "kV",
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        {
          "name": "Supply Current, serial interface active at 3.4 MHz",
          "symbol": "IDD",
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          "unit": "µA",
          "min": null,
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          "conditions": "Serial Interface Active, HVC/A0 = VIH (or VIL), Write all 0's to volatile Wiper 0, VDD = 5.5V, FSCL @ 3.4 MHz",
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        },
        {
          "name": "Supply Current, serial interface active at 100 kHz",
          "symbol": "IDD",
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          "min": null,
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        },
        {
          "name": "Supply Current, serial interface inactive",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2.5,
          "max": 5,
          "conditions": "Serial Interface Inactive, (Stop condition, SCL = SDA = VIH), Wiper = 0, VDD = 5.5V, HVC/A0 = VIH",
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        },
        {
          "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,
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        },
        {
          "name": "Delay after device exits the Reset state",
          "symbol": "TBORD",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": 10,
          "max": 20,
          "conditions": "VDD > VBOR",
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        {
          "name": "HVC/A0, SDA, SCL, A1, RESET pin voltage range",
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          "kind": "electrical",
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          "conditions": "VDD >= 4.5V",
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          "name": "Nominal Resistance RAB (-503 device)",
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          "kind": "electrical",
          "unit": "k",
          "min": 40,
          "typ": 50,
          "max": 60,
          "conditions": "-503 devices (Note 1)",
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        {
          "name": "Resistance tolerance (-503 device)",
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          "kind": "tolerance",
          "unit": "%",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "Resistance (± 20%), -503 devices",
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        },
        {
          "name": "Nominal Resistance Match",
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          "kind": "electrical",
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          "min": null,
          "typ": 0.2,
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        {
          "name": "Nominal Resistance Match, RBW worst case from mean",
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        {
          "name": "Wiper Resistance, VDD = 5.5 V",
          "symbol": "RW",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
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          "max": 160,
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        {
          "name": "Wiper Resistance, VDD = 2.7 V",
          "symbol": "RW",
          "kind": "electrical",
          "unit": "Ω",
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          "typ": 75,
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          "conditions": "VDD = 2.7 V, IW = 2.0 mA, code = 00h",
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        },
        {
          "name": "Full Scale Error (8-bit, 50 k)",
          "symbol": "VWFSE",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.8,
          "typ": -0.1,
          "max": null,
          "conditions": "50 k 8-bit 3.0V ≤ VDD ≤ 5.5V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Zero Scale Error (8-bit, 50 k)",
          "symbol": "VWZSE",
          "kind": "electrical",
          "unit": "LSb",
          "min": null,
          "typ": 0.1,
          "max": 0.8,
          "conditions": "50 k 8-bit 3.0V ≤ VDD ≤ 5.5V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Potentiometer Integral Non-linearity (8-bit)",
          "symbol": "INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -1,
          "typ": 0.5,
          "max": 1,
          "conditions": "8-bit 3.0V ≤ VDD ≤ 5.5V, MCP44X1 devices only (Note 2)",
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          "source": "datasheet"
        },
        {
          "name": "Potentiometer Differential Non-linearity (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 devices only (Note 2)",
          "source_page": 7,
          "source": "datasheet"
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        {
          "name": "Rheostat Integral Non-linearity (50 k, 5.5V)",
          "symbol": "R-INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -1.5,
          "typ": 0.5,
          "max": 1.5,
          "conditions": "50 k 8-bit 5.5V, IW = 90 µA",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Rheostat Integral Non-linearity (50 k, 3.0V)",
          "symbol": "R-INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -2,
          "typ": 1,
          "max": 2,
          "conditions": "50 k 8-bit 3.0V, IW = 48 µA (Note 7)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Rheostat Differential Non-linearity (50 k, 5.5V)",
          "symbol": "R-DNL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "50 k 8-bit 5.5V, IW = 90 µA",
          "source_page": 9,
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        {
          "name": "Rheostat Differential Non-linearity (50 k, 3.0V)",
          "symbol": "R-DNL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "50 k 8-bit 3.0V, IW = 48 µA (Note 7)",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Schmitt Trigger High Input Threshold, all inputs except SDA and SCL",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "VDD",
          "min": 0.45,
          "typ": null,
          "max": null,
          "conditions": "2.7V ≤ VDD ≤ 5.5V",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Schmitt Trigger High Input Threshold, SDA and SCL",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "VDD",
          "min": 0.7,
          "typ": null,
          "max": null,
          "conditions": "SDA and SCL, 100 kHz, 400 kHz, 1.7 MHz, 3.4 MHz",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Schmitt Trigger Low Input Threshold, all inputs except SDA and SCL",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "VDD",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "All inputs except SDA and SCL",
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          "source": "datasheet"
        },
        {
          "name": "Schmitt Trigger Low Input Threshold, SDA and SCL",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "VDD",
          "min": -0.5,
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