BL24CM1A-PARC

{
  "schema_version": 1,
  "type": "component",
  "slug": "bl24cm1a-parc",
  "title": "BL24CM1A-PARC",
  "brief": "BL Shanghai Belling 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",
    "bl24cm1a-parc"
  ],
  "component": {
    "mpn": "BL24CM1A-PARC",
    "manufacturer": "BL Shanghai Belling",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Memory",
    "subcategory": "EEPROM",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/905fc3d02f6860f4455be03c1b6c306f.pdf",
    "parts": {
      "symbol": "bl24cm1a-parc.kicad_sym",
      "footprint": "bl24cm1a-parc.kicad_mod",
      "model_3d": "bl24cm1a-parc-etched.glb",
      "model_3d_plain": "bl24cm1a-parc.glb",
      "model_3d_step": "bl24cm1a-parc-etched.step",
      "model_3d_step_plain": "bl24cm1a-parc.step",
      "lbr": "bl24cm1a-parc.lbr"
    },
    "distributor_links": {
      "lcsc": "C414060"
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection. Leave floating or tie to GND for best noise immunity."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Device address input bit 1. Hard-wired to VCC or GND to select one of up to four BL24CM1A devices on the same I2C bus. Internally biased to logic low if left floating (proprietary internal bias)."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Device address input bit 2. Hard-wired to VCC or GND to select one of up to four BL24CM1A devices on the same I2C bus. Internally biased to logic low if left floating."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for supply and all logic signals."
      },
      {
        "number": "5",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C serial data. Bidirectional, open-drain; requires an external pull-up resistor to VCC. May be wire-ORed with other open-drain/open-collector devices on the same bus."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "I2C serial clock input, up to 400 kHz at VCC >= 2.0 V. Positive edge clocks data into the EEPROM; negative edge clocks data out. Schmitt-trigger, filtered input."
      },
      {
        "number": "7",
        "name": "WP",
        "type": "input",
        "description": "Hardware write-protect input. Tie to GND for normal read/write operation; tie to VCC to write-protect the full 1024K array (see Table 2). Schmitt-trigger, filtered input."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, single-supply operation down to 2.0 V (up to 400 kHz at 2.0 V). Decouple to GND with a 100 nF ceramic capacitor placed close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/905fc3d02f6860f4455be03c1b6c306f.pdf",
        "pages": 20,
        "sha256": "90c054d62d989bfb",
        "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"
    },
    "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": "bl24cm1a-parc.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": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bl24cm1a-parc-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": "5ecfde27839b78c0081a93441c1216c0b7187132aa3eb4b435ab8611ad9d6a6e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "BL Shanghai Belling",
      "Package": "SOP-8",
      "Category": "Memory",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "bl24cm1a-parc"
  ],
  "discovery_pitch": "BL24CM1A-PARC (BL Shanghai Belling) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bl24cm1a-parc.kicad_sym",
    "bl24cm1a-parc.kicad_mod",
    "bl24cm1a-parc.glb",
    "bl24cm1a-parc.step",
    "bl24cm1a-parc-etched.step",
    "bl24cm1a-parc.lbr",
    "docs/hero.png",
    "docs/bl24cm1a-parc-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T17:49:26.139Z"
}