COS3121SR

{
  "schema_version": 1,
  "type": "component",
  "slug": "cos3121sr",
  "title": "COS3121SR",
  "brief": "COSINE Gate Drivers, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "motor driver ics",
    "cos3121sr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "COS3121SR",
    "manufacturer": "COSINE",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "Motor Driver ICs",
    "subcategory": "Gate Drivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603383867587764224",
    "parts": {
      "symbol": "cos3121sr.kicad_sym",
      "footprint": "cos3121sr.kicad_mod",
      "model_3d": "cos3121sr-hero.glb",
      "model_3d_plain": "cos3121sr-etched.glb",
      "model_3d_step": "cos3121sr-etched.step",
      "model_3d_step_plain": "cos3121sr.step",
      "lbr": "cos3121sr.lbr"
    },
    "distributor_links": {
      "lcsc": "C30212521"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T09:24:09Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Bias supply for the MOSFET driver, rated 4.5 V to 18 V with respect to GND, and should be bypassed with local ceramic capacitors (1.0 µF suggested); absolute maximum DC supply is 25 V."
      },
      {
        "number": "2",
        "name": "INPUT",
        "type": "input",
        "description": "High-impedance TTL/CMOS-compatible control input with 300 mV hysteresis, and the absolute maximum input voltage is GND-5 V to VDD+0.3 V."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "TTL/CMOS-compatible enable input that must be pulled LOW to inhibit the driver, with the output LOW regardless of the input when disabled and an internal 100 kΩ pull-up to VDD for active-high operation."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Device return pin that should have a low-impedance connection to the bias supply return, and which carries high peak current when the capacitive load is discharged; the part tolerates up to 5 V of noise spiking of either polarity on the ground pin."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground duplicate of pin 4 that must be connected together with pin 4 for proper operation, carrying the same return and high peak discharge current."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "CMOS push-pull driver output with equal pull-up and pull-down strength, held LOW if the input is unbiased or floating, with a 9.0 A peak output current rating for 10 V ≤ VDD ≤ 18 V."
      },
      {
        "number": "7",
        "name": "OUTPUT",
        "type": "output",
        "description": "Output duplicate of pin 6 that must be connected together with pin 6 for proper operation, with the same CMOS push-pull characteristics."
      },
      {
        "number": "8",
        "name": "VDD",
        "type": "power_in",
        "description": "Duplicate of pin 1 bias supply input that must be connected together with pin 1, rated 4.5 V to 18 V with respect to GND."
      }
    ],
    "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-to-number mapping for SOP-8 comes from the 'Pin Description' table on page 3. The pin diagra; The datasheet pin table does not label the package explicitly for pins 1-8; the note that the expose; Pins 1/8 (VDD), 4/5 (GND) and 6/7 (OUTPUT) are listed as duplicates that must both be connected for "
        ],
        "pages_sent": 8,
        "cost_usd": 0.0276,
        "at": "2026-10-18T09:22:03"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603383867587764224",
        "pages": 8,
        "sha256": "128b6dd1d63b734a",
        "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"
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    "models_3d": [
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        "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": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cos3121sr-etched.step",
        "role": "eda",
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        "sha256": "46e5579bb8eec19fd7e45a19a756163bc52cd06b3581d3b22e851b25e33b9166",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "COSINE",
      "Package": "SOP-8",
      "Category": "Motor Driver ICs",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "128b6dd1d63b734a761d3d5468e8109cd2e0755c10a5913998524fd1933fcd68",
      "rows": [
        {
          "name": "DC Supply Voltage",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": 18,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "DC supply voltage VDD",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Package Thermal Resistance, junction-to-ambient (SOP8)",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 155,
          "max": null,
          "conditions": "SOP8 package, junction-to-ambient",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Signal High Current, inverting input",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 88,
          "max": 125,
          "conditions": "Inverting Input Current, VINX=0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input Signal High Current, non-inverting input",
          "symbol": "IIH",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 88,
          "max": 125,
          "conditions": "Non-inverting Input Current, VINX=18V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating Voltage Range",
          "symbol": "VDD",
          "kind": "electrical",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": 18,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Under-Voltage Lockout ON Threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 3.7,
          "typ": null,
          "max": 4.1,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "COS3121SR (COSINE) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}