PIC18F66J55-I

{
  "schema_version": 1,
  "type": "component",
  "slug": "pic18f66j55-i",
  "title": "PIC18F66J55-I",
  "brief": "Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TQFP-64(10x10). 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",
    "single chip microcomputer-microcontroller",
    "pic18f66j55-i",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "PIC18F66J55-I",
    "manufacturer": "Microchip Tech",
    "package": "TQFP-64(10x10)",
    "pin_count": 64,
    "category": "Single Chip Microcomputer/Microcontroller",
    "subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
    "datasheet": "https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/39775c.pdf",
    "parts": {
      "symbol": "pic18f66j55-i.kicad_sym",
      "footprint": "pic18f66j55-i.kicad_mod",
      "model_3d": "pic18f66j55-i-hero.glb",
      "model_3d_plain": "pic18f66j55-i-etched.glb",
      "model_3d_step": "pic18f66j55-i-etched.step",
      "model_3d_step_plain": "pic18f66j55-i.step",
      "lbr": "pic18f66j55-i.lbr"
    },
    "distributor_links": {
      "lcsc": "C634585"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T01:16:23Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RE1/PMWR/P2C",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port write strobe and ECCP2 PWM output C."
      },
      {
        "number": "2",
        "name": "RE0/PMRD/P2D",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port read strobe and ECCP2 PWM output D."
      },
      {
        "number": "3",
        "name": "RG0/PMA8/ECCP3/P3A",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port address, ECCP3 capture/compare and PWM output A."
      },
      {
        "number": "4",
        "name": "RG1/PMA7/TX2/CK2",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port address and EUSART2 asynchronous transmit or synchronous clock."
      },
      {
        "number": "5",
        "name": "RG2/PMA6/RX2/DT2",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port address and EUSART2 asynchronous receive or synchronous data."
      },
      {
        "number": "6",
        "name": "RG3/PMCS1/CCP4/P3D",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port chip select 1, CCP4 capture/compare/PWM output and ECCP3 PWM output D."
      },
      {
        "number": "7",
        "name": "MCLR",
        "type": "input",
        "description": "Master Clear (Reset) input, an active-low Reset to the device with Schmitt Trigger buffer."
      },
      {
        "number": "8",
        "name": "RG4/PMCS2/CCP5/P1D",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port chip select 2, CCP5 capture/compare/PWM output and ECCP1 PWM output D."
      },
      {
        "number": "9",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference for logic and I/O pins."
      },
      {
        "number": "10",
        "name": "VDDCORE/VCAP",
        "type": "power_in",
        "description": "Core logic power supply when the regulator is disabled, or external filter capacitor connection when the regulator is enabled."
      },
      {
        "number": "11",
        "name": "RF7/SS1/C1OUT",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also MSSP1 SPI slave select input and Comparator 1 output."
      },
      {
        "number": "12",
        "name": "RF6/AN11/C1INA",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also A/D analog input channel 11 and Comparator 1 input A."
      },
      {
        "number": "13",
        "name": "RF5/AN10/C1INB/CVREF",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also A/D analog input channel 10, Comparator 1 input B and comparator reference voltage output."
      },
      {
        "number": "14",
        "name": "RF4/D+",
        "type": "bidirectional",
        "description": "Digital input with Schmitt Trigger buffer, also USB differential plus line (input/output) of the on-chip transceiver."
      },
      {
        "number": "15",
        "name": "RF3/D-",
        "type": "bidirectional",
        "description": "Digital input with Schmitt Trigger buffer, also USB differential minus line (input/output) of the on-chip transceiver."
      },
      {
        "number": "16",
        "name": "RF2/PMA5/AN7/C2INB",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port address, A/D analog input channel 7 and Comparator 2 input B."
      },
      {
        "number": "17",
        "name": "VUSB",
        "type": "power_in",
        "description": "USB voltage input pin."
      },
      {
        "number": "18",
        "name": "ENVREG",
        "type": "input",
        "description": "Enable input for the on-chip voltage regulator, with Schmitt Trigger buffer."
      },
      {
        "number": "19",
        "name": "AVDD",
        "type": "power_in",
        "description": "Positive supply for analog modules."
      },
      {
        "number": "20",
        "name": "AVSS",
        "type": "power_in",
        "description": "Ground reference for analog modules."
      },
      {
        "number": "21",
        "name": "RA3/AN3/VREF+",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input, also A/D analog input channel 3 and A/D high reference voltage input."
      },
      {
        "number": "22",
        "name": "RA2/AN2/VREF-",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input, also A/D analog input channel 2 and A/D low reference voltage input."
      },
      {
        "number": "23",
        "name": "RA1/AN1",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input, also A/D analog input channel 1."
      },
      {
        "number": "24",
        "name": "RA0/AN0",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input, also A/D analog input channel 0."
      },
      {
        "number": "25",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference for logic and I/O pins."
      },
      {
        "number": "26",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply for peripheral digital logic and I/O pins."
      },
      {
        "number": "27",
        "name": "RA5/AN4/C2INA",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input, also A/D analog input channel 4 and Comparator 2 input A."
      },
      {
        "number": "28",
        "name": "RA4/T0CKI",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Timer0 external clock input."
      },
      {
        "number": "29",
        "name": "RC1/T1OSI/ECCP2/P2A",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Timer1 oscillator input, ECCP2 capture/compare output and ECCP2 PWM output A."
      },
      {
        "number": "30",
        "name": "RC0/T1OSO/T13CKI",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Timer1 oscillator output and Timer1/Timer3 external clock input."
      },
      {
        "number": "31",
        "name": "RC6/TX1/CK1",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also EUSART1 asynchronous transmit or synchronous clock."
      },
      {
        "number": "32",
        "name": "RC7/RX1/DT1",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also EUSART1 asynchronous receive or synchronous data."
      },
      {
        "number": "33",
        "name": "RC2/ECCP1/P1A",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also ECCP1 capture/compare/PWM output and ECCP1 PWM output A."
      },
      {
        "number": "34",
        "name": "RC3/SCK1/SCL1",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also MSSP1 SPI clock or I2C clock input/output."
      },
      {
        "number": "35",
        "name": "RC4/SDI1/SDA1",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also MSSP1 SPI data input or I2C data input/output."
      },
      {
        "number": "36",
        "name": "RC5/SDO1/C2OUT",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also MSSP1 SPI data output and Comparator 2 output."
      },
      {
        "number": "37",
        "name": "RB7/KBI3/PGD",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input and weak pull-up, also interrupt-on-change pin and ICSP/ICD serial data pin."
      },
      {
        "number": "38",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply for peripheral digital logic and I/O pins."
      },
      {
        "number": "39",
        "name": "OSC1/CLKI/RA7",
        "type": "input",
        "description": "Oscillator crystal or external clock input, which is also general purpose I/O when OSC1 is not used for the clock function."
      },
      {
        "number": "40",
        "name": "OSC2/CLKO/RA6",
        "type": "output",
        "description": "Oscillator crystal output or clock output (FOSC/4), which is also general purpose I/O when OSC2 is not used for the clock function."
      },
      {
        "number": "41",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference for logic and I/O pins."
      },
      {
        "number": "42",
        "name": "RB6/KBI2/PGC",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input and weak pull-up, also interrupt-on-change pin and ICSP/ICD serial clock input."
      },
      {
        "number": "43",
        "name": "RB5/KBI1/PMA0",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input and weak pull-up, also interrupt-on-change pin and Parallel Master Port address."
      },
      {
        "number": "44",
        "name": "RB4/KBI0/PMA1",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input and weak pull-up, also interrupt-on-change pin and Parallel Master Port address."
      },
      {
        "number": "45",
        "name": "RB3/INT3/PMA2",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input and weak pull-up, also external interrupt 3 input and Parallel Master Port address."
      },
      {
        "number": "46",
        "name": "RB2/INT2/PMA3",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input and weak pull-up, also external interrupt 2 input and Parallel Master Port address."
      },
      {
        "number": "47",
        "name": "RB1/INT1/PMA4",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input and weak pull-up, also external interrupt 1 input and Parallel Master Port address."
      },
      {
        "number": "48",
        "name": "RB0/FLT0/INT0",
        "type": "bidirectional",
        "description": "Digital I/O with TTL input and weak pull-up, also ECCP1/2/3 Fault input and external interrupt 0 input."
      },
      {
        "number": "49",
        "name": "RD7/PMD7/SS2",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port data and MSSP2 SPI slave select input."
      },
      {
        "number": "50",
        "name": "RD6/PMD6/SCK2/SCL2",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port data and MSSP2 SPI clock or I2C clock input/output."
      },
      {
        "number": "51",
        "name": "RD5/PMD5/SDI2/SDA2",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port data and MSSP2 SPI data input or I2C data input/output."
      },
      {
        "number": "52",
        "name": "RD4/PMD4/SDO2",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port data and MSSP2 SPI data output."
      },
      {
        "number": "53",
        "name": "RD3/PMD3",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port data."
      },
      {
        "number": "54",
        "name": "RD2/PMD2",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port data."
      },
      {
        "number": "55",
        "name": "RD1/PMD1",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port data."
      },
      {
        "number": "56",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference for logic and I/O pins."
      },
      {
        "number": "57",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply for peripheral digital logic and I/O pins."
      },
      {
        "number": "58",
        "name": "RD0/PMD0",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port data."
      },
      {
        "number": "59",
        "name": "RE7/PMA9/ECCP2/P2A",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port address, ECCP2 capture/compare output and ECCP2 PWM output A."
      },
      {
        "number": "60",
        "name": "RE6/PMA10/P1B",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port address and ECCP1 PWM output B."
      },
      {
        "number": "61",
        "name": "RE5/PMA11/P1C",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port address and ECCP1 PWM output C."
      },
      {
        "number": "62",
        "name": "RE4/PMA12/P3B",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port address and ECCP3 PWM output B."
      },
      {
        "number": "63",
        "name": "RE3/PMA13/P3C/REFO",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port address, ECCP3 PWM output C and reference clock output."
      },
      {
        "number": "64",
        "name": "RE2/PMBE/P2B",
        "type": "bidirectional",
        "description": "Digital I/O with Schmitt Trigger input, also Parallel Master Port byte enable and ECCP2 PWM output B."
      }
    ],
    "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 supplied text is the PIC18F87J50 family datasheet (DS39775C), not a PIC18F66J55-specific one. Ta; VDDCORE/VCAP (pin 10) is a shared function: it is a core supply input when the regulator is disabled",
          "1/64 pins cited to the wrong page (name found elsewhere): ['25:VSS@p15']"
        ],
        "pages_sent": 92,
        "cost_usd": 0.1425,
        "at": "2026-10-27T01:15:38"
      },
      "datasheet": {
        "url": "https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/39775c.pdf",
        "pages": 480,
        "sha256": "88bc899e2743258d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 64,
        "described": 64,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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        "sha256": "60567e81b0770b6c519104183a7a05ba52dddc11146b5fbe21434fbb5801696c",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "TQFP-64(10x10)",
      "Category": "Single Chip Microcomputer/Microcontroller",
      "Pins": "64"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "88bc899e2743258d3e237305b4803980bf84d7e666e858f8737506840adfb1fa",
      "rows": [
        {
          "name": "Operating Voltage Range",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 3.6,
          "conditions": "Family feature list; not per-variant electrical table",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating Frequency",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": null,
          "typ": null,
          "max": 48,
          "conditions": "DC – 48 MHz for PIC18F66J55 (Table 1-1)",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Digital-only input tolerance (5.5V tolerant)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 5.5,
          "conditions": "Digital-only pins (PORTB, PORTC[7:2], PORTD, PORTE, PORTF[7], PORTG[4:0]) tolerate input above VDD; analog-capable pins limited to VDD",
          "source_page": 137,
          "source": "datasheet"
        },
        {
          "name": "VBUS minimum before enabling D+/D- pull-up",
          "symbol": "VBUS",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.17,
          "typ": null,
          "max": null,
          "conditions": "Monitor VBUS; do not enable USB pull-up until VBUS greater than 1.17 V",
          "source_page": 315,
          "source": "datasheet"
        },
        {
          "name": "High-current sink/source (PORTB and PORTC)",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "High-current sink/source 25 mA, PORTB and PORTC",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "External USB pull-up resistor tolerance",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "1.5 kΩ pull-up on D+ or D-, as required by USB specification",
          "source_page": 315,
          "source": "datasheet"
        },
        {
          "name": "MCLR pull-up resistor to VDD",
          "symbol": "MCLR",
          "kind": "recommended_operating",
          "unit": "kΩ",
          "min": 1,
          "typ": null,
          "max": 10,
          "conditions": "MCLR tied to VDD through resistor for POR (1 kΩ to 10 kΩ)",
          "source_page": 57,
          "source": "datasheet"
        },
        {
          "name": "External USB pull-up resistor nominal",
          "symbol": "",
          "kind": "electrical",
          "unit": "kΩ",
          "min": null,
          "typ": 1.5,
          "max": null,
          "conditions": "External pull-up on VUSB to D+ or D-",
          "source_page": 315,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "PIC18F66J55-I (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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