CAT24C256WI-GT3

{
  "schema_version": 1,
  "type": "component",
  "slug": "cat24c256wi-gt3",
  "title": "CAT24C256WI-GT3",
  "brief": "onsemi EEPROM, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "memory",
    "cat24c256wi-gt3"
  ],
  "component": {
    "mpn": "CAT24C256WI-GT3",
    "manufacturer": "onsemi",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Memory",
    "subcategory": "EEPROM",
    "datasheet": "https://www.onsemi.com/pdf/datasheet/cat24c256wi-gt3-d.pdf",
    "parts": {
      "symbol": "cat24c256wi-gt3.kicad_sym",
      "footprint": "cat24c256wi-gt3.kicad_mod",
      "model_3d": "cat24c256wi-gt3-etched.glb",
      "model_3d_plain": "cat24c256wi-gt3.glb",
      "model_3d_step": "cat24c256wi-gt3-etched.step",
      "model_3d_step_plain": "cat24c256wi-gt3.step",
      "lbr": "cat24c256wi-gt3.lbr"
    },
    "distributor_links": {
      "lcsc": "C79987"
    },
    "pins": [
      {
        "number": "1",
        "name": "A0",
        "type": "input",
        "description": "Device address input bit 0. Hard-wired to VCC or VSS to set the least significant bit of the 3-bit I2C slave address, allowing up to eight CAT24C256 devices to share the bus. Internally pulled down to GND with a weak pull-down."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Device address input bit 1. Tie to VCC or VSS to select part of the 3-bit I2C slave address. Internally pulled down to GND with a weak pull-down."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Device address input bit 2 (MSB of the address select field). Tie to VCC or VSS to select part of the 3-bit I2C slave address. Internally pulled down to GND with a weak pull-down."
      },
      {
        "number": "4",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground / 0 V supply reference for the device."
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data line. Open-drain bidirectional pin used to transfer address and data into and out of the EEPROM; requires an external pull-up resistor to VCC. Input capacitance is 8 pF max."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input. Positive edges clock data into the device; negative edges clock data out. Supports Standard (100 kHz), Fast (400 kHz), and Fast-Plus (1 MHz) modes."
      },
      {
        "number": "7",
        "name": "WP",
        "type": "input",
        "description": "Write Protect input. When held HIGH, all write operations to the entire memory array are inhibited; when LOW (or left floating with the internal pull-down), writes are enabled. Internally pulled down to GND (strong pull-down until ~0.5 x VCC, then weak)."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage input. Operating range 1.8 V to 5.5 V. Standby current typically < 2 uA."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.onsemi.com/pdf/datasheet/cat24c256wi-gt3-d.pdf",
        "pages": 18,
        "sha256": "f6b7e0279c00395b",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "cat24c256wi-gt3.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cat24c256wi-gt3-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3d50c3d48e573b1898b2aadf575011a7a3aa054c6ce293434fb2d7709b33591a",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOIC-8",
      "Category": "Memory",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cat24c256wi-gt3"
  ],
  "discovery_pitch": "CAT24C256WI-GT3 (onsemi) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cat24c256wi-gt3.kicad_sym",
    "cat24c256wi-gt3.kicad_mod",
    "cat24c256wi-gt3.glb",
    "cat24c256wi-gt3.step",
    "cat24c256wi-gt3-etched.step",
    "cat24c256wi-gt3.lbr",
    "docs/hero.png",
    "docs/cat24c256wi-gt3-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T18:27:17.325Z"
}