MS8844

{
  "schema_version": 1,
  "type": "component",
  "slug": "ms8844",
  "title": "MS8844",
  "brief": "Hangzhou Ruimeng Tech Gate Drive ICs, HTSSOP-28-EP. 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",
    "power management ics",
    "ms8844",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "MS8844",
    "manufacturer": "Hangzhou Ruimeng Tech",
    "package": "HTSSOP-28-EP",
    "pin_count": 29,
    "category": "Power Management ICs",
    "subcategory": "Gate Drive ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/df4c894559c24ffc14c1343362a4d350.pdf",
    "parts": {
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      "footprint": "ms8844.kicad_mod",
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      "model_3d_plain": "ms8844-etched.glb",
      "model_3d_step": "ms8844-etched.step",
      "model_3d_step_plain": "ms8844.step",
      "lbr": "ms8844.lbr"
    },
    "distributor_links": {
      "lcsc": "C231943"
    },
    "distributor_check": {
      "checked_at": "2026-10-26T18:30:04Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CP1",
        "type": "passive",
        "description": "Charge pump external capacitor pin; a 0.01uF 100V capacitor connects between CP1 and CP2."
      },
      {
        "number": "2",
        "name": "CP2",
        "type": "passive",
        "description": "Charge pump external capacitor pin; a 0.01uF 100V capacitor connects between CP1 and CP2."
      },
      {
        "number": "3",
        "name": "VCP",
        "type": "passive",
        "description": "High-side gate drive voltage from the charge pump; a 0.1uF 16V capacitor is connected to VM per the application figure."
      },
      {
        "number": "4",
        "name": "VM",
        "type": "power_in",
        "description": "Power supply voltage, operating range 8V to 36V (absolute maximum -0.3 to 40V)."
      },
      {
        "number": "5",
        "name": "OUT1",
        "type": "output",
        "description": "Half-bridge output 1."
      },
      {
        "number": "6",
        "name": "SCR12",
        "type": "passive",
        "description": "Low-side NMOS source of OUT1 and OUT2; a sense resistor can be connected here to set the overcurrent protection."
      },
      {
        "number": "7",
        "name": "OUT2",
        "type": "output",
        "description": "Half-bridge output 2."
      },
      {
        "number": "8",
        "name": "OUT3",
        "type": "output",
        "description": "Half-bridge output 3."
      },
      {
        "number": "9",
        "name": "SCR34",
        "type": "passive",
        "description": "Low-side NMOS source of OUT3 and OUT4 (datasheet text says OUT1, OUT2); a sense resistor can be connected here to set the overcurrent protection."
      },
      {
        "number": "10",
        "name": "OUT4",
        "type": "output",
        "description": "Half-bridge output 4."
      },
      {
        "number": "11",
        "name": "VM",
        "type": "power_in",
        "description": "Power supply voltage, operating range 8V to 36V (absolute maximum -0.3 to 40V)."
      },
      {
        "number": "12",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected, left floating."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected, left floating."
      },
      {
        "number": "14",
        "name": "VNEG",
        "type": "power_in",
        "description": "Ground pin or negative supply of a dual-supply arrangement; PGND voltage limit is ±600mV."
      },
      {
        "number": "15",
        "name": "V3P3OUT",
        "type": "power_out",
        "description": "Internal 3.3V LDO output supplying up to 10mA, which stays active in sleep mode."
      },
      {
        "number": "16",
        "name": "nRESET",
        "type": "input",
        "description": "Reset input, active low; resets the chip, disables all outputs and ignores inputs while low."
      },
      {
        "number": "17",
        "name": "nSLEEP",
        "type": "input",
        "description": "Sleep input, active low; enters low-power sleep mode with outputs and charge pump off and internal logic reset, with about 1ms wake-up time."
      },
      {
        "number": "18",
        "name": "nFAULT",
        "type": "output",
        "description": "Open-drain fault status output pulled low on overcurrent, overtemperature or undervoltage, with VOL max 500mV at 5mA."
      },
      {
        "number": "19",
        "name": "LGND",
        "type": "power_in",
        "description": "Logic input ground, voltage range from VGND to VM-8V."
      },
      {
        "number": "20",
        "name": "EN4",
        "type": "input",
        "description": "Channel 4 enable input; low sets OUT4 to high impedance."
      },
      {
        "number": "21",
        "name": "IN4",
        "type": "input",
        "description": "Channel 4 data input controlling the state of OUT4."
      },
      {
        "number": "22",
        "name": "EN3",
        "type": "input",
        "description": "Channel 3 enable input; low sets OUT3 to high impedance."
      },
      {
        "number": "23",
        "name": "IN3",
        "type": "input",
        "description": "Channel 3 data input controlling the state of OUT3."
      },
      {
        "number": "24",
        "name": "EN2",
        "type": "input",
        "description": "Channel 2 enable input; low sets OUT2 to high impedance."
      },
      {
        "number": "25",
        "name": "IN2",
        "type": "input",
        "description": "Channel 2 data input controlling the state of OUT2."
      },
      {
        "number": "26",
        "name": "EN1",
        "type": "input",
        "description": "Channel 1 enable input; low sets OUT1 to high impedance."
      },
      {
        "number": "27",
        "name": "IN1",
        "type": "input",
        "description": "Channel 1 data input controlling OUT1 (pin table labels it channel 2 data, apparently a typo)."
      },
      {
        "number": "28",
        "name": "VNEG",
        "type": "power_in",
        "description": "Ground pin or negative supply of a dual-supply arrangement; PGND voltage limit is ±600mV."
      },
      {
        "number": "29",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
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      "factory_chain": {
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        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin table has no entry for the exposed pad of the eTSSOP28 package, so it is not included; its conne; Pin table lists LGND as type OD, which looks like a copy error since the description says it is the ; IN1 description says 'channel 2 data', inconsistent with the EN1/OUT1 pairing and the function table"
        ],
        "pages_sent": 12,
        "cost_usd": 0.1013,
        "at": "2026-10-26T18:29:53"
      },
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        "pages": 12,
        "sha256": "ff2fd456766b7589",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 29,
        "described": 29,
        "cites_pages": true,
        "refuses_to_fabricate": true
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  "metadata": {
    "specs": {
      "Manufacturer": "Hangzhou Ruimeng Tech",
      "Package": "HTSSOP-28-EP",
      "Category": "Power Management ICs",
      "Pins": "29"
    },
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        {
          "name": "Operating temperature",
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          "name": "Storage temperature",
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          "name": "ENx high to OUTx high delay",
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          "name": "ENx low to OUTx low delay",
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          "name": "ENx low to OUTx high delay",
          "symbol": "t4",
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          "name": "INx high to OUTx high delay",
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        {
          "name": "INx low to OUTx low delay",
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        },
        {
          "name": "Output rise time",
          "symbol": "t7",
          "kind": "timing",
          "unit": "ns",
          "min": 30,
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          "max": 150,
          "conditions": "VM=24V, RL=20Ω, TA=25℃",
          "source_page": 3,
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        },
        {
          "name": "Output fall time",
          "symbol": "t8",
          "kind": "timing",
          "unit": "ns",
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        {
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          "symbol": "VM",
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        },
        {
          "name": "Drive ground voltage",
          "symbol": "VGNDX",
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          "unit": "mV",
          "min": -500,
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        },
        {
          "name": "Internal LDO drive current",
          "symbol": "ILDO",
          "kind": "electrical",
          "unit": "mA",
          "min": 0,
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        {
          "name": "Internal LDO output voltage",
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        {
          "name": "Sleep mode current",
          "symbol": "IVMQ",
          "kind": "electrical",
          "unit": "uA",
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          "conditions": "VM=24V",
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        {
          "name": "Undervoltage protection voltage",
          "symbol": "VUVLO",
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          "name": "Logic input high level",
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        {
          "name": "Logic input low level",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
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          "max": 0.7,
          "conditions": "",
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        {
          "name": "Hysteresis window",
          "symbol": "VHYS",
          "kind": "electrical",
          "unit": "mV",
          "min": 50,
          "typ": null,
          "max": 600,
          "conditions": "VDD=2.7～3.6V",
          "source_page": 4,
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        {
          "name": "Logic input low current",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "uA",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "VIN=0",
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        {
          "name": "Logic input high current",
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          "kind": "electrical",
          "unit": "uA",
          "min": null,
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          "max": 100,
          "conditions": "VIN=3.3V",
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        },
        {
          "name": "Pull-down resistance",
          "symbol": "RPD",
          "kind": "electrical",
          "unit": "KΩ",
          "min": null,
          "typ": 80,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "nFAULT output low voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "IO=5mA",
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        },
        {
          "name": "nFAULT output high current",
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          "kind": "electrical",
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          "min": null,
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        },
        {
          "name": "High-side FET on-resistance",
          "symbol": "Rdson",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.24,
          "max": null,
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        {
          "name": "High-side FET on-resistance",
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          "symbol": "IOFF",
          "kind": "electrical",
          "unit": "uA",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "",
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          "name": "Dead time",
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          "max": null,
          "conditions": "",
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          "name": "Overcurrent protection",
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          "min": 3,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
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          "max": null,
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          "max": 180,
          "conditions": "",
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          "source": "datasheet"
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    "name": "Ray",
    "email": "[email protected]"
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