MS35776

{
  "slug": "ms35776",
  "version": "0.1.0",
  "type": "component",
  "description": "杭州瑞盟 Stepper Motor Driver, QFN-28-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "motor driver ics",
    "ms35776",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ms35776.kicad_sym",
    "ms35776.kicad_mod",
    "ms35776.glb",
    "ms35776.step",
    "ms35776.lbr",
    "docs/hero.png",
    "docs/ms35776-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ms35776-hero.glb",
    "ms35776-hero.overlay.json",
    "ms35776-etched.glb"
  ],
  "component": {
    "mpn": "MS35776",
    "manufacturer": "杭州瑞盟",
    "package": "QFN-28-EP(5x5)",
    "pin_count": 29,
    "category": "Motor Driver ICs",
    "subcategory": "Stepper Motor Driver",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590904546191626240",
    "parts": {
      "symbol": "ms35776.kicad_sym",
      "footprint": "ms35776.kicad_mod",
      "model_3d": "ms35776-hero.glb",
      "model_3d_plain": "ms35776-etched.glb",
      "model_3d_step": "ms35776-etched.step",
      "model_3d_step_plain": "ms35776.step",
      "lbr": "ms35776.lbr"
    },
    "distributor_links": {
      "lcsc": "C5371384"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T20:19:53Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BOUT2",
        "type": "output",
        "description": "Motor coil B output 2 of the full-bridge driver."
      },
      {
        "number": "2",
        "name": "ENN",
        "type": "input",
        "description": "Enable input; when high it disables the output drivers, and per the datasheet ENN low enables the output drive and ENN is used to reset FAULT."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "4",
        "name": "CPO",
        "type": "passive",
        "description": "Charge-pump capacitor output, connected to CPI through a 22nF/50V capacitor."
      },
      {
        "number": "5",
        "name": "CPI",
        "type": "passive",
        "description": "Charge-pump capacitor input, connected to CPO through a 22nF/50V capacitor."
      },
      {
        "number": "6",
        "name": "VCP",
        "type": "power_out",
        "description": "Charge-pump voltage, connected to VM through a 100nF capacitor."
      },
      {
        "number": "7",
        "name": "MODE",
        "type": "input",
        "description": "Operating mode select with internal pull-up: 1 selects quiet mode and 0 selects fast mode."
      },
      {
        "number": "8",
        "name": "V5",
        "type": "power_out",
        "description": "Internal 5V LDO output, requiring a 2.2µF to 4.7µF capacitor to ground; all outputs are turned off if V5 falls low."
      },
      {
        "number": "9",
        "name": "MS1",
        "type": "input",
        "description": "Microstep configuration input with internal pull-down resistor."
      },
      {
        "number": "10",
        "name": "MS2",
        "type": "input",
        "description": "Microstep configuration input with internal pull-down resistor."
      },
      {
        "number": "11",
        "name": "FAULT",
        "type": "output",
        "description": "Internal error signal output that goes high when the driver outputs are shut off; it can be reset via ENN."
      },
      {
        "number": "12",
        "name": "FG0",
        "type": "output",
        "description": "Outputs a pulse on positive zero-crossing of the A-coil current."
      },
      {
        "number": "13",
        "name": "CLK",
        "type": "input",
        "description": "Clock input; can be tied to ground when the internal clock is used."
      },
      {
        "number": "14",
        "name": "PDN",
        "type": "bidirectional",
        "description": "Automatic current decay mode input; pulling it low enables automatic current decay at standstill."
      },
      {
        "number": "15",
        "name": "VIO",
        "type": "power_in",
        "description": "Supply for the digital I/O pins, 3.3V to 5V."
      },
      {
        "number": "16",
        "name": "STEP",
        "type": "input",
        "description": "Microstep step input."
      },
      {
        "number": "17",
        "name": "VREF",
        "type": "power_in",
        "description": "Analog reference voltage input controlling the output current; in internal sense-resistor mode it serves as the analog reference current input."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "19",
        "name": "DIR",
        "type": "input",
        "description": "Direction input with internal pull-down resistor."
      },
      {
        "number": "20",
        "name": "NC",
        "type": "unconnected",
        "description": "Not used; the datasheet recommends connecting this pin to ground."
      },
      {
        "number": "21",
        "name": "AOUT2",
        "type": "output",
        "description": "Motor coil A output 2 of the full-bridge driver."
      },
      {
        "number": "22",
        "name": "VM",
        "type": "power_in",
        "description": "Motor supply voltage."
      },
      {
        "number": "23",
        "name": "SENA",
        "type": "bidirectional",
        "description": "Source terminal of the coil A low-side MOSFET; connect the sense resistor to ground, or connect directly to ground in internal sense-resistor mode."
      },
      {
        "number": "24",
        "name": "AOUT1",
        "type": "output",
        "description": "Motor coil A output 1 of the full-bridge driver."
      },
      {
        "number": "25",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "26",
        "name": "BOUT1",
        "type": "output",
        "description": "Motor coil B output 1 of the full-bridge driver."
      },
      {
        "number": "27",
        "name": "SENB",
        "type": "bidirectional",
        "description": "Source terminal of the coil B low-side MOSFET; connect the sense resistor to ground, or connect directly to ground in internal sense-resistor mode."
      },
      {
        "number": "28",
        "name": "VM",
        "type": "power_in",
        "description": "Motor supply voltage."
      },
      {
        "number": "29",
        "name": "EPAD",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: The pin-table number column prints '-' for the exposed pad; 'EPAD' is used as the pin number here. C; The datasheet labels V5, VCP, CPO and CPI as 'IO'. Mapped V5 and VCP to power_out (regulator/charge-; The datasheet labels the motor coil outputs 'IO'. Mapped to KiCad 'output' because they are H-bridge",
          "exposed pad 29 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 16,
        "cost_usd": 0.0599,
        "at": "2026-10-17T20:18:23"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590904546191626240",
        "pages": 16,
        "sha256": "57c9ab436ca2aaab",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 29,
        "described": 29,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ms35776.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          0.92
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "e9d6d740f505b03e5aa0ac826330f9e269344b84656d051f50eb07ac162749eb",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ms35776-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          0.92
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "32040acdd63dfcf06da2c484e7e33f1aa6aa49552ef1d4bb23daaedef9508d8e",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}