AT24C256C-XHL-B

{
  "slug": "at24c256c-xhl-b",
  "version": "0.1.0",
  "type": "component",
  "description": "Microchip Tech EEPROM, TSSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "memory",
    "at24c256c-xhl-b",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "at24c256c-xhl-b.kicad_sym",
    "at24c256c-xhl-b.kicad_mod",
    "at24c256c-xhl-b.glb",
    "at24c256c-xhl-b.step",
    "at24c256c-xhl-b.lbr",
    "docs/hero.png",
    "docs/at24c256c-xhl-b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "at24c256c-xhl-b-hero.glb",
    "at24c256c-xhl-b-hero.overlay.json",
    "at24c256c-xhl-b-etched.glb"
  ],
  "component": {
    "mpn": "AT24C256C-XHL-B",
    "manufacturer": "Microchip Tech",
    "package": "TSSOP-8",
    "pin_count": 8,
    "category": "Memory",
    "subcategory": "EEPROM",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/efcf85084b3af96c044c3f7d77d63ca3.pdf",
    "parts": {
      "symbol": "at24c256c-xhl-b.kicad_sym",
      "footprint": "at24c256c-xhl-b.kicad_mod",
      "model_3d": "at24c256c-xhl-b-hero.glb",
      "model_3d_plain": "at24c256c-xhl-b-etched.glb",
      "model_3d_step": "at24c256c-xhl-b-etched.step",
      "model_3d_step_plain": "at24c256c-xhl-b.step",
      "lbr": "at24c256c-xhl-b.lbr"
    },
    "distributor_links": {
      "lcsc": "C619847",
      "digikey": "AT24C256C-XHL-B-ND",
      "mouser": "556-AT24C256C-XHL-B"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T22:27:59Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "AT24C256C-XHL-B-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "556-AT24C256C-XHL-B",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A0",
        "type": "input",
        "description": "Device address input, hard-wired to GND or VCC for device selection; if left undriven it is internally pulled down to GND, and Microchip recommends connecting it to a known state with a pull-up of 10 kΩ or less."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Device address input, hard-wired to GND or VCC for device selection; if left undriven it is internally pulled down to GND, and Microchip recommends connecting it to a known state with a pull-up of 10 kΩ or less."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Device address input, hard-wired to GND or VCC for device selection; if left undriven it is internally pulled down to GND, and Microchip recommends connecting it to a known state with a pull-up of 10 kΩ or less."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the power supply, which should be connected to the system ground."
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "Open-drain bidirectional serial data pin that must be pulled high through an external pull-up resistor not exceeding 10 kΩ and may be wire-ORed with other open-drain devices on the bus."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "Serial clock input that latches SDA data on its rising edge and must be forced high when the bus is idle or pulled high through an external pull-up resistor."
      },
      {
        "number": "7",
        "name": "WP",
        "type": "input",
        "description": "Write-protect input: connection to GND allows normal write operations, connection to VCC inhibits writes to the full array, and if left floating it is internally pulled down to GND, so a known state with a pull-up of 10 kΩ or less is recommended."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Device power supply pin; operation at invalid VCC voltages may produce spurious results and should not be attempted."
      }
    ],
    "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 MPN AT24C256C-XHL-B is not listed in the datasheet ordering table (page 36). The only TSSOP orde; The datasheet gives input pin types but not a formal electrical classification for these pins. They "
        ],
        "pages_sent": 19,
        "cost_usd": 0.0565,
        "at": "2026-11-05T22:27:43"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/efcf85084b3af96c044c3f7d77d63ca3.pdf",
        "pages": 39,
        "sha256": "5887615de6328a65",
        "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": "at24c256c-xhl-b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          3.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2299fb3b85d686800712b24f5411cd4896ad7de29f3aab656d6dc1006211629b",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "at24c256c-xhl-b-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          3.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "89eeec49e22f0ef174cf276de888f7707ba3325884856f28ea061917537d7fa3",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "ST",
      "source_page": 28,
      "D": {
        "nom_mm": 3.0,
        "range_mm": [
          2.9,
          3.1
        ]
      },
      "E1": {
        "nom_mm": 4.4,
        "range_mm": [
          4.3,
          4.5
        ]
      },
      "E": {
        "nom_mm": 6.4,
        "range_mm": [
          null,
          null
        ]
      },
      "e": {
        "nom_mm": 0.65,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.2,
        "range_mm": [
          null,
          1.2
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "at24c256c-xhl-b.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}