A4953ELJTR-T

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  "slug": "a4953eljtr-t",
  "title": "A4953ELJTR-T",
  "brief": "Allegro MicroSystems, LLC Motor Driver ICs, SOIC-8-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": [
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    "power management ics",
    "a4953eljtr-t",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "A4953ELJTR-T",
    "manufacturer": "Allegro MicroSystems, LLC",
    "package": "SOIC-8-EP",
    "pin_count": 9,
    "category": "Power Management ICs",
    "subcategory": "Motor Driver ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/4cadb7a6993e469ba8a45e8db15d6aeb.pdf",
    "parts": {
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      "model_3d_step_plain": "a4953eljtr-t.step",
      "lbr": "a4953eljtr-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C150822"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T23:09:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 699 calls left today"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
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    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; a star ground should be located as close to the device as possible."
      },
      {
        "number": "2",
        "name": "IN2",
        "type": "input",
        "description": "Logic input 2 for bridge control (VIN(1) min 2.0 V, VIN(0) max 0.8 V, 50 kΩ typ internal pull-down); both inputs low for over 1 ms enters Low Power Standby mode."
      },
      {
        "number": "3",
        "name": "IN1",
        "type": "input",
        "description": "Logic input 1 for bridge control (VIN(1) min 2.0 V, VIN(0) max 0.8 V, 50 kΩ typ internal pull-down); both inputs low for over 1 ms enters Low Power Standby mode."
      },
      {
        "number": "4",
        "name": "VREF",
        "type": "power_in",
        "description": "Analog input setting the PWM current limit, 0 to 5 V input range (ITripMAX = VREF / (AV × RS))."
      },
      {
        "number": "5",
        "name": "VBB",
        "type": "power_in",
        "description": "Load supply voltage, 8 to 40 V operating range; decouple with a 100 µF electrolytic in parallel with a lower-value ceramic capacitor."
      },
      {
        "number": "6",
        "name": "OUT1",
        "type": "output",
        "description": "DMOS full bridge output 1, with up to 2 A continuous output current."
      },
      {
        "number": "7",
        "name": "LSS",
        "type": "passive",
        "description": "Power return, connection for the current sense resistor to ground; limit the sense voltage to ±500 mV."
      },
      {
        "number": "8",
        "name": "OUT2",
        "type": "output",
        "description": "DMOS full bridge output 2, with up to 2 A continuous output current."
      },
      {
        "number": "9",
        "name": "PAD",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
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        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
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        ],
        "pages_sent": 11,
        "cost_usd": 0.0975,
        "at": "2026-10-22T23:08:56"
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        "pages": 11,
        "sha256": "9b8c176dcbf20a12",
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      "cad": "KiCad official (CC-BY-SA 4.0)",
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        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
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  "metadata": {
    "specs": {
      "Manufacturer": "Allegro MicroSystems, LLC",
      "Package": "SOIC-8-EP",
      "Category": "Power Management ICs",
      "Pins": "9"
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    "appearance": {
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        "quote": "8-pin SOICN package (suffix LJ). Both packages have an exposed thermal pad, and are lead (Pb) free, with 100% matte tin",
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        "plating": "tin"
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          "name": "UVLO Enable Threshold",
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          "name": "UVLO Hysteresis",
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          "name": "Thermal Shutdown Temperature",
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          "name": "Overcurrent Protection Pulse Width",
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          "name": "Sense Voltage (LSS pin)",
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          "name": "Package Thermal Resistance",
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          "kind": "thermal",
          "unit": "ºC/W",
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          "typ": 35,
          "max": null,
          "conditions": "LJ package, on 4-layer PCB based on JEDEC standard",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Package Thermal Resistance",
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          "kind": "thermal",
          "unit": "ºC/W",
          "min": null,
          "typ": 62,
          "max": null,
          "conditions": "LJ package, on 2-layer PCB with 0.8 in2. 2-oz. copper each side",
          "source_page": 2,
          "source": "datasheet"
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