AT24C128MM

{
  "schema_version": 1,
  "type": "component",
  "slug": "at24c128mm",
  "title": "AT24C128MM",
  "brief": "HGSEMI EEPROM, MSOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "memory",
    "at24c128mm"
  ],
  "component": {
    "mpn": "AT24C128MM",
    "manufacturer": "HGSEMI",
    "package": "MSOP-8",
    "pin_count": 8,
    "category": "Memory",
    "subcategory": "EEPROM",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2312081750_HGSEMI-AT24C128MM-TR_C19193537.pdf",
    "parts": {
      "symbol": "at24c128mm.kicad_sym",
      "footprint": "at24c128mm.kicad_mod",
      "model_3d": "at24c128mm-etched.glb",
      "model_3d_plain": "at24c128mm.glb",
      "model_3d_step": "at24c128mm-etched.step",
      "model_3d_step_plain": "at24c128mm.step",
      "lbr": "at24c128mm.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "E0",
        "type": "input",
        "description": "Slave address input bit 0. Combined with E1/E2 to select one of up to 8 devices on the same I2C bus. Internally pulled down to Vss if left floating."
      },
      {
        "number": "2",
        "name": "E1",
        "type": "input",
        "description": "Slave address input bit 1. Hardware-selectable device address bit; internally pulled down to Vss if left floating."
      },
      {
        "number": "3",
        "name": "E2",
        "type": "input",
        "description": "Slave address input bit 2. Hardware-selectable device address bit; internally pulled down to Vss if left floating."
      },
      {
        "number": "4",
        "name": "Vss",
        "type": "power_in",
        "description": "Ground reference for the Vcc supply."
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data (bidirectional, open-drain). Requires an external pull-up resistor to Vcc. Input capacitance approx. 8 pF."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input. Positive-edge clocks data in, negative-edge clocks data out. Supports up to 400 kHz (1.7V) or 1 MHz (higher Vcc)."
      },
      {
        "number": "7",
        "name": "WCB",
        "type": "input",
        "description": "Write Control input, active low. Tie to Vss to allow write operations; tie to Vcc to inhibit all writes to the memory array. Internally pulled down to Vss if left floating."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage input, 1.7V to 5.5V. Typical read current 0.2 mA and write current 0.8 mA at 400 kHz."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2312081750_HGSEMI-AT24C128MM-TR_C19193537.pdf",
        "pages": 19,
        "sha256": "ade6fc1683c10678",
        "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": "at24c128mm.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          0.95
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "847c4c5023fe1603fbd36900a5dcc4bd3901ba473f71d42c9a469f0236eaadf3",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "at24c128mm-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3,
          0.95
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "53c73514d64b0c4d7da4f46db372264b8de00d2be9bd6bee64a5b5558a8998c1",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "MSOP-8",
      "Category": "Memory",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "at24c128mm"
  ],
  "discovery_pitch": "AT24C128MM (HGSEMI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "at24c128mm.kicad_sym",
    "at24c128mm.kicad_mod",
    "at24c128mm.glb",
    "at24c128mm.step",
    "at24c128mm.lbr",
    "docs/hero.png",
    "docs/at24c128mm-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "at24c128mm-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T17:06:15.774Z"
}