AT24C04M

{
  "schema_version": 1,
  "type": "component",
  "slug": "at24c04m",
  "title": "AT24C04M",
  "brief": "HGSEMI EEPROM, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "memory",
    "at24c04m"
  ],
  "component": {
    "mpn": "AT24C04M",
    "manufacturer": "HGSEMI",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Memory",
    "subcategory": "EEPROM",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/b893dd43697233b7a1f9e6b00d1bd507.pdf",
    "parts": {
      "symbol": "at24c04m.kicad_sym",
      "footprint": "at24c04m.kicad_mod",
      "model_3d": "at24c04m-etched.glb",
      "model_3d_plain": "at24c04m.glb",
      "model_3d_step": "at24c04m-etched.step",
      "model_3d_step_plain": "at24c04m.step",
      "lbr": "at24c04m.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "A0/NC",
        "type": "unconnected",
        "description": "Not used on AT24C04 (A0 device-address pin is a no-connect on the 4Kb variant). May be left floating or tied to GND. On the 2Kb AT24C02 this pin selects the least-significant device-address bit."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Device-address hardware input bit A1. Must match the A1 bit in the device-address byte transmitted by the master. Allows up to four AT24C04 devices on a single I2C bus."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Device-address hardware input bit A2. Must match the A2 bit in the device-address byte transmitted by the master. Combined with A1 it selects one of four devices on the bus."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for supply and I/O signals (0 V)."
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "Bi-directional I2C serial data. Open-drain output, requires an external pull-up resistor to VCC (typ. 4.7 kΩ). May be wire-ORed with other open-drain devices on the same bus."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input. Positive edges clock data into the EEPROM; negative edges clock data out. Up to 1 MHz at 5 V, 400 kHz at 1.8/2.5/2.7 V."
      },
      {
        "number": "7",
        "name": "WP",
        "type": "input",
        "description": "Hardware Write Protect. Tie to GND for normal read/write operations; tie to VCC to write-protect the full 4K array. Schmitt-triggered, filtered input."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, 1.7 V to 5.5 V. Decouple with a 100 nF ceramic capacitor to GND close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/b893dd43697233b7a1f9e6b00d1bd507.pdf",
        "pages": 19,
        "sha256": "436467b62ca478ef",
        "source_tier": "lcsc"
      },
      "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": "at24c04m.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": "at24c04m-etched.step",
        "role": "eda",
        "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": "5601eda1a438c2cfcd6fc08f9163dd65a2babdf316214f2063592b4d8336d191",
        "checked": "2026-11-03",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "SOP-8",
      "Category": "Memory",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "at24c04m"
  ],
  "discovery_pitch": "AT24C04M (HGSEMI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "at24c04m.kicad_sym",
    "at24c04m.kicad_mod",
    "at24c04m.glb",
    "at24c04m.step",
    "at24c04m-etched.step",
    "at24c04m.lbr",
    "docs/hero.png",
    "docs/at24c04m-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T17:04:45.382Z"
}