MCP4021-202E

{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp4021-202e",
  "title": "MCP4021-202E",
  "brief": "Microchip Tech Digital Potentiometers, MSOP-8. 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",
    "mcp4021-202e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MCP4021-202E",
    "manufacturer": "Microchip Tech",
    "package": "MSOP-8",
    "pin_count": 8,
    "category": "Data Acquisition",
    "subcategory": "Digital Potentiometers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590909974140960768",
    "parts": {
      "symbol": "mcp4021-202e.kicad_sym",
      "footprint": "mcp4021-202e.kicad_mod",
      "model_3d": "mcp4021-202e-hero.glb",
      "model_3d_plain": "mcp4021-202e-etched.glb",
      "model_3d_step": "mcp4021-202e-etched.step",
      "model_3d_step_plain": "mcp4021-202e.step",
      "lbr": "mcp4021-202e.lbr"
    },
    "distributor_links": {
      "lcsc": "C636025"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T06:41:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive power supply input, specified from 2.7V to 5.5V relative to VSS, with a decoupling capacitor on VDD to VSS recommended for maximum performance."
      },
      {
        "number": "2",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "3",
        "name": "A",
        "type": "bidirectional",
        "description": "Potentiometer terminal A, the fixed connection to the 0x3F tap; the voltage must stay between VSS and VDD and it can carry both positive and negative current."
      },
      {
        "number": "4",
        "name": "W",
        "type": "bidirectional",
        "description": "Potentiometer wiper terminal, the adjustable tap; the voltage must stay between VSS and VDD and it can carry both positive and negative current."
      },
      {
        "number": "5",
        "name": "CS",
        "type": "input",
        "description": "Chip select input: driving VIL enables serial commands, driving VIHH enables high-voltage commands that also control WiperLock, and an internal pull-up holds it at VIH when floating."
      },
      {
        "number": "6",
        "name": "B",
        "type": "bidirectional",
        "description": "Potentiometer terminal B, the fixed connection to the 0x00 tap; the voltage must stay between VSS and VDD and it can carry both positive and negative current."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "8",
        "name": "U/D",
        "type": "input",
        "description": "TTL-compatible increment/decrement input that moves the wiper one step toward terminal A when incremented and toward terminal B when decremented."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "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 pin table on page 25 is headed 'MCP4021 (SOIC-8)'; no MSOP-specific pin table or MSOP pin diagra"
        ],
        "pages_sent": 18,
        "cost_usd": 0.052,
        "at": "2026-10-19T06:41:15"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590909974140960768",
        "pages": 74,
        "sha256": "6d9ee87ab7f5b4fc",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mcp4021-202e.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          0.95
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "847c4c5023fe1603fbd36900a5dcc4bd3901ba473f71d42c9a469f0236eaadf3",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mcp4021-202e-etched.step",
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        "up": "Z",
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        "sha256": "57f654b638291c84c9768b82989ddf1caeffc79359044f13b442a49bbaded900",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "MSOP-8",
      "Category": "Data Acquisition",
      "Pins": "8"
    },
    "appearance": {
      "contacts": {
        "quote": "8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC] A A2",
        "page": 65,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "6d9ee87ab7f5b4fc1a3f804bf30293249f9a2aaee1d6132043971b7fe8dccb4a"
    },
    "characteristics": {
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      "rows": [
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          "name": "Operating Voltage Range",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "CS Input Voltage",
          "symbol": "VCS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 12.5,
          "conditions": "The CS pin will be at one of three input levels (VIL, VIH or VIHH). (Note 6)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Supply Current, serial interface inactive",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.3,
          "max": 1,
          "conditions": "Serial Interface Inactive (CS = VIH, U/D = VIH)",
          "source_page": 2,
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        },
        {
          "name": "Supply Current, EE write cycle",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "mA",
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          "typ": 0.6,
          "max": 3,
          "conditions": "EE Write cycle, TA = +25°C",
          "source_page": 2,
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        },
        {
          "name": "Resistance RAB (-202 device)",
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          "kind": "electrical",
          "unit": "kΩ",
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          "conditions": "-202 devices (Note 1)",
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        {
          "name": "Resistance tolerance (RAB, -202)",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
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        },
        {
          "name": "Wiper Resistance, 5.5V",
          "symbol": "RW",
          "kind": "electrical",
          "unit": "Ω",
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          "typ": 70,
          "max": 125,
          "conditions": "5.5V (Note 3, Note 4)",
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          "name": "Wiper Resistance, 2.7V",
          "symbol": "RW",
          "kind": "electrical",
          "unit": "Ω",
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        },
        {
          "name": "Full-Scale Error",
          "symbol": "VWFSE",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": -0.1,
          "max": 0.5,
          "conditions": "Code 3Fh (MCP4021/23 only)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Zero-Scale Error",
          "symbol": "VWZSE",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.1,
          "max": 0.5,
          "conditions": "Code 00h (MCP4021/23 only)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Potentiometer Integral Non-linearity",
          "symbol": "INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "MCP4021/23 only (Note 2)",
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          "source": "datasheet"
        },
        {
          "name": "Potentiometer Differential Non-linearity",
          "symbol": "DNL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "MCP4021/23 only (Note 2)",
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        },
        {
          "name": "Maximum current through A, W or B",
          "symbol": "IW",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 2.5,
          "conditions": "Note 6",
          "source_page": 3,
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        },
        {
          "name": "Rheostat Integral Non-linearity, 5.5V (-202, 2.1 k)",
          "symbol": "R-INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "-202 devices (2.1 k), 5.5V (Note 4, Note 8)",
          "source_page": 4,
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        {
          "name": "Rheostat Integral Non-linearity, 2.7V (-202, 2.1 k)",
          "symbol": "R-INL",
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          "min": -8.5,
          "typ": 4.5,
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          "conditions": "-202 devices (2.1 k), 2.7V (Note 7)",
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        {
          "name": "Rheostat Differential Non-linearity, 5.5V (-202, 2.1 k)",
          "symbol": "R-DNL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.25,
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          "conditions": "-202 devices (2.1 k), 5.5V (Note 4, Note 8)",
          "source_page": 4,
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        {
          "name": "Rheostat Differential Non-linearity, 2.7V (-202, 2.1 k)",
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          "unit": "LSb",
          "min": -1,
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          "conditions": "-202 devices (2.1 k), 2.7V (Note 7)",
          "source_page": 4,
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        {
          "name": "High-Voltage Input Entry Voltage (Threshold for WiperLock)",
          "symbol": "VIHH",
          "kind": "electrical",
          "unit": "V",
          "min": 8.5,
          "typ": null,
          "max": 12.5,
          "conditions": "+7°C to +125°C",
          "source_page": 5,
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        {
          "name": "High-Voltage Input Entry Voltage (Threshold for WiperLock)",
          "symbol": "VIHH",
          "kind": "electrical",
          "unit": "V",
          "min": 9,
          "typ": null,
          "max": 12.5,
          "conditions": "–40°C to +125°C",
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          "source": "datasheet"
        },
        {
          "name": "Input Leakage Current (CS, U/D)",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VIN = VDD",
          "source_page": 5,
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        },
        {
          "name": "Internal EEPROM Write Time",
          "symbol": "twc",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "@25°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Internal EEPROM Write Time",
          "symbol": "twc",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "-40°C to +125°C",
          "source_page": 6,
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        {
          "name": "CS Low Time",
          "symbol": "tCSLO",
          "kind": "timing",
          "unit": "µs",
          "min": 5,
          "typ": null,
          "max": null,
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        {
          "name": "CS High Time",
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          "kind": "timing",
          "unit": "ns",
          "min": 500,
          "typ": null,
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        {
          "name": "U/D to CS Hold Time",
          "symbol": "tLUC",
          "kind": "timing",
          "unit": "ns",
          "min": 500,
          "typ": null,
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        {
          "name": "CS to U/D Low Setup Time",
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        {
          "name": "CS to U/D High Setup Time",
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          "kind": "timing",
          "unit": "µs",
          "min": 3,
          "typ": null,
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          "name": "U/D High Time",
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          "name": "U/D Low Time",
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          "kind": "timing",
          "unit": "ns",
          "min": 500,
          "typ": null,
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        {
          "name": "Up/Down Toggle Frequency",
          "symbol": "fUD",
          "kind": "timing",
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        {
          "name": "Wiper Settling Time (-202)",
          "symbol": "tS",
          "kind": "timing",
          "unit": "µs",
          "min": 0.5,
          "typ": null,
          "max": null,
          "conditions": "2.1 k CL = 100 pF",
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        {
          "name": "HV U/D to CS Hold Time",
          "symbol": "tHUC",
          "kind": "timing",
          "unit": "µs",
          "min": 1.5,
          "typ": null,
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        {
          "name": "HV CS to U/D Low Setup Time",
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          "unit": "µs",
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        {
          "name": "HV CS to U/D High Setup Time",
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          "kind": "timing",
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          "name": "Power Supply Sensitivity",
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          "conditions": "VDD = 4.5V to 5.5V, VA = 4.5V, Code = 1Fh",
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        {
          "name": "Maximum VDD (absolute)",
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        {
          "name": "CS and U/D inputs w.r.t VSS",
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          "name": "A, B and W terminals w.r.t VSS (upper limit VDD + 0.3 V)",
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        {
          "name": "Current at Input Pins",
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          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -10,
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          "conditions": "",
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        {
          "name": "Current at Supply Pins",
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          "kind": "absolute_maximum",
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          "max": 10,
          "conditions": "",
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        {
          "name": "Current at Potentiometer Pins",
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          "unit": "mA",
          "min": -2.5,
          "typ": null,
          "max": 2.5,
          "conditions": "",
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        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
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        {
          "name": "Ambient temperature with power applied",
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          "kind": "absolute_maximum",
          "unit": "°C",
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          "conditions": "",
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        {
          "name": "ESD protection (HBM)",
          "symbol": "",
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          "unit": "kV",
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          "conditions": "HBM",
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          "name": "ESD protection (MM)",
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          "conditions": "MM",
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        {
          "name": "Maximum Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
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        {
          "name": "Operating Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 10,
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        {
          "name": "Ratiometric Temperature Coefficient",
          "symbol": "VWA/T",
          "kind": "temperature_coefficient",
          "unit": "ppm/°C",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "MCP4021 and MCP4023 only, code = 1Fh",
          "source_page": 3,
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        {
          "name": "Nominal Resistance Tempco",
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          "kind": "temperature_coefficient",
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          "name": "Nominal Resistance Tempco",
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          "conditions": "TA = –40°C to +85°C",
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          "source": "datasheet"
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        {
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