BL0940

{
  "slug": "bl0940",
  "version": "0.1.0",
  "type": "component",
  "description": "BL(Shanghai Belling) Energy Metering ICs, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "data converters",
    "bl0940",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "bl0940.kicad_sym",
    "bl0940.kicad_mod",
    "bl0940.glb",
    "bl0940.step",
    "bl0940.lbr",
    "docs/hero.png",
    "docs/bl0940-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "bl0940-hero.glb",
    "bl0940-hero.overlay.json",
    "bl0940-etched.glb"
  ],
  "component": {
    "mpn": "BL0940",
    "manufacturer": "BL(Shanghai Belling)",
    "package": "TSSOP-14",
    "pin_count": 14,
    "category": "Data Converters",
    "subcategory": "Energy Metering ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/4182bdc6ac64eefc3cf2e46f258f61ea.pdf",
    "parts": {
      "symbol": "bl0940.kicad_sym",
      "footprint": "bl0940.kicad_mod",
      "model_3d": "bl0940-hero.glb",
      "model_3d_plain": "bl0940-etched.glb",
      "model_3d_step": "bl0940-etched.step",
      "model_3d_step_plain": "bl0940.step",
      "lbr": "bl0940.lbr"
    },
    "distributor_links": {
      "lcsc": "C691894"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T06:30:16Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Chip supply pin at +3.3V, with the datasheet specifying a supply range of 3.0 V to 3.6 V and absolute maximum of -0.3 V to +4 V."
      },
      {
        "number": "2",
        "name": "VT",
        "type": "input",
        "description": "External temperature sensor signal input to the SAR ADC, whose maximum input is VDD/2 (full scale 1024 codes)."
      },
      {
        "number": "3",
        "name": "IP1",
        "type": "input",
        "description": "Current channel analog input (differential with IN1), with a maximum differential voltage of ±50 mV (35 mV rms)."
      },
      {
        "number": "4",
        "name": "IN1",
        "type": "input",
        "description": "Current channel analog input (differential with IP1), with a maximum differential voltage of ±50 mV (35 mV rms)."
      },
      {
        "number": "5",
        "name": "VP",
        "type": "input",
        "description": "Voltage signal input (differential with VN), with a maximum differential voltage of ±100 mV (70 mV rms)."
      },
      {
        "number": "6",
        "name": "VN",
        "type": "input",
        "description": "Voltage signal input (differential with VP), with a maximum differential voltage of ±100 mV (70 mV rms)."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Chip ground, referenced at 0 V for all supply and signal specifications."
      },
      {
        "number": "8",
        "name": "ZX",
        "type": "output",
        "description": "Voltage zero-crossing indicator output, which goes low during the positive half-cycle and high during the negative half-cycle with a delay of about 570 µs relative to the input signal."
      },
      {
        "number": "9",
        "name": "CF",
        "type": "output",
        "description": "Energy pulse output whose function is multiplexed by the MODE register (energy pulse, over-current/leakage alarm, or temperature alarm), with a 50% duty cycle for periods under 180 ms."
      },
      {
        "number": "10",
        "name": "SEL",
        "type": "input",
        "description": "UART/SPI mode select (0 = UART, 1 = SPI) with an internal pull-down of 56.9 kΩ, so floating selects UART and tying directly to VDD selects SPI."
      },
      {
        "number": "11",
        "name": "SCLK",
        "type": "input",
        "description": "SPI clock input (Mode 1, CPOL=0, CPHA=1, maximum 900 kHz); may be left floating in UART mode."
      },
      {
        "number": "12",
        "name": "RX/SDI",
        "type": "input",
        "description": "Multiplexed pin serving as UART RX or SPI data input (DIN), with logic input high level at least 2.6 V and low level at most 0.8 V at VDD=3.3 V ±5%."
      },
      {
        "number": "13",
        "name": "TX/SDO",
        "type": "output",
        "description": "Multiplexed pin serving as UART TX or SPI data output (DOUT), which requires an external pull-up resistor and outputs high level of at least VDD-0.5 V at 5 mA."
      },
      {
        "number": "14",
        "name": "VPP",
        "type": "unconnected",
        "description": "Reserved pin that should be left floating (not connected)."
      }
    ],
    "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: Pin 13 (TX/SDO) is typed as output, but the datasheet states SDO goes to high-impedance (tri-state) ; Pin 12 (RX/SDI) is typed as input; it is a multiplexed UART RX/SPI DIN pin, and the datasheet gives ; The datasheet's pin table gives the VT pin no explicit voltage limit in the pin table; the VDD/2 max"
        ],
        "pages_sent": 31,
        "cost_usd": 0.0808,
        "at": "2026-10-21T06:26:05"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/4182bdc6ac64eefc3cf2e46f258f61ea.pdf",
        "pages": 31,
        "sha256": "da8e25f05d4e5f65",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bl0940.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.0
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3ee5786aae56190997aa793ba3cfc003fd616782770e29719b4562f012982245",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bl0940-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.0
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "0ca3c86705dc0d8dbc28bb89a44da458c86731768e6bb0ac38a5ae5730d6dffc",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}