MCP79400T-I

{
  "slug": "mcp79400t-i",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Real Time Clocks, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "clock-timing",
    "mcp79400t-i",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mcp79400t-i.kicad_sym",
    "mcp79400t-i.kicad_mod",
    "mcp79400t-i.glb",
    "mcp79400t-i.step",
    "mcp79400t-i.lbr",
    "docs/hero.png",
    "docs/mcp79400t-i-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mcp79400t-i-hero.glb",
    "mcp79400t-i-hero.overlay.json",
    "mcp79400t-i-etched.glb"
  ],
  "component": {
    "mpn": "MCP79400T-I",
    "manufacturer": "Microchip Tech",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Clock/Timing",
    "subcategory": "Real Time Clocks",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589798933121048576",
    "parts": {
      "symbol": "mcp79400t-i.kicad_sym",
      "footprint": "mcp79400t-i.kicad_mod",
      "model_3d": "mcp79400t-i-hero.glb",
      "model_3d_plain": "mcp79400t-i-etched.glb",
      "model_3d_step": "mcp79400t-i-etched.step",
      "model_3d_step_plain": "mcp79400t-i.step",
      "lbr": "mcp79400t-i.lbr"
    },
    "distributor_links": {
      "lcsc": "C623881"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T01:35:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "X1",
        "type": "input",
        "description": "Crystal oscillator input for a 32.768 kHz tuning-fork crystal with external load capacitors, optimized for crystals with 6-9 pF load capacitance; it also serves as the external clock input when the device is configured for an external oscillator."
      },
      {
        "number": "2",
        "name": "X2",
        "type": "output",
        "description": "Crystal oscillator output for the 32.768 kHz crystal; it must be left floating when an external 32.768 kHz clock is applied to X1."
      },
      {
        "number": "3",
        "name": "VBAT",
        "type": "power_in",
        "description": "Backup supply input that maintains the RTCC and SRAM when VCC is unavailable; connect to VSS if battery backup is not used."
      },
      {
        "number": "4",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "Open-drain bidirectional I2C serial data line that requires a pull-up resistor to VCC (typically 10 kΩ for 100 kHz or 2 kΩ for 400 kHz), and may change only while SCL is low except for Start and Stop conditions."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input that synchronizes data transfer to and from the device."
      },
      {
        "number": "7",
        "name": "MFP",
        "type": "output",
        "description": "Open-drain multifunction output for alarm, square-wave, or general-purpose output that requires a pull-up resistor to VCC (typically 10 kΩ) and may be left floating if unused."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Primary power supply input, with an operating voltage range of 1.8 V to 5.5 V as stated in the datasheet features list."
      }
    ],
    "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 8-pin SOIC pinout is taken from Table 3-1 (page 8) and the package-types diagram (page 1); the S; The VCC operating range of 1.8 V to 5.5 V is stated on page 1 (Features), not on the pin-description"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0608,
        "at": "2026-10-21T01:30:49"
      },
      "datasheet": {
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        "pages": 60,
        "sha256": "9dbb557d73a1b0be",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "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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          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mcp79400t-i-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
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        "sha256": "bd02508ec9692cf3daee44c7310a704c86bd74bf79120a18f4fdde122974027c",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}