25LC640A-E

{
  "slug": "25lc640a-e",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech Pre-ordered Chips, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface ics",
    "25lc640a-e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "25lc640a-e.kicad_sym",
    "25lc640a-e.kicad_mod",
    "25lc640a-e.glb",
    "25lc640a-e.step",
    "25lc640a-e.lbr",
    "docs/hero.png",
    "docs/25lc640a-e-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "25lc640a-e-hero.glb",
    "25lc640a-e-hero.overlay.json",
    "25lc640a-e-etched.glb"
  ],
  "component": {
    "mpn": "25LC640A-E",
    "manufacturer": "Microchip Tech",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Interface ICs",
    "subcategory": "Pre-ordered Chips",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/32a2895b90c4154e6eb712c5099a48fb.pdf",
    "parts": {
      "symbol": "25lc640a-e.kicad_sym",
      "footprint": "25lc640a-e.kicad_mod",
      "model_3d": "25lc640a-e-hero.glb",
      "model_3d_plain": "25lc640a-e-etched.glb",
      "model_3d_step": "25lc640a-e-etched.step",
      "model_3d_step_plain": "25lc640a-e.step",
      "lbr": "25lc640a-e.lbr"
    },
    "distributor_links": {
      "lcsc": "C1349842"
    },
    "distributor_check": {
      "checked_at": "2026-10-26T18:43:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CS",
        "type": "input",
        "description": "Chip Select input: low selects the device, high deselects it and forces Standby mode with SO in high impedance; a low-to-high transition after a valid write sequence starts the internal write cycle."
      },
      {
        "number": "2",
        "name": "SO",
        "type": "tri_state",
        "description": "Serial Data Output: data is shifted out after the falling edge of the serial clock, and the pin is high-impedance when the device is deselected or HOLD is low."
      },
      {
        "number": "3",
        "name": "WP",
        "type": "input",
        "description": "Write-Protect pin: with WPEN set, WP low disables writes to the nonvolatile STATUS register bits, and when WP is high all functions operate normally."
      },
      {
        "number": "4",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "5",
        "name": "SI",
        "type": "input",
        "description": "Serial Data Input: receives instructions, addresses and data, latched on the rising edge of the serial clock."
      },
      {
        "number": "6",
        "name": "SCK",
        "type": "input",
        "description": "Serial Clock input: synchronizes communication, with SI latched on the rising edge and SO updated after the falling edge of the clock (max. 10 MHz)."
      },
      {
        "number": "7",
        "name": "HOLD",
        "type": "input",
        "description": "Hold input: pulling it low while SCK is low pauses serial communication without resetting the sequence, and it must be held high when not in use."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, 2.5-5.5V for the 25LC640A."
      }
    ],
    "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: MPN 25LC640A-E is a bare part number; the datasheet lists SN (SOIC, 3.90 mm) as the SOIC package cod"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0735,
        "at": "2026-10-26T18:43:27"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/32a2895b90c4154e6eb712c5099a48fb.pdf",
        "pages": 36,
        "sha256": "dea0f4dbeaa56d5b",
        "source_tier": "mfr"
      },
      "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": "25lc640a-e.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "25lc640a-e-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "061efbcfef6e9a7882b87136f667908ed2bcd6e7245691a2278afa028188b52d",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}