A4953ELJTR-T

{
  "slug": "a4953eljtr-t",
  "version": "0.1.0",
  "type": "component",
  "description": "Allegro MicroSystems, LLC Motor Driver ICs, SOIC-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "a4953eljtr-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "a4953eljtr-t.kicad_sym",
    "a4953eljtr-t.kicad_mod",
    "a4953eljtr-t.glb",
    "a4953eljtr-t.step",
    "a4953eljtr-t.lbr",
    "docs/hero.png",
    "docs/a4953eljtr-t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "a4953eljtr-t-hero.glb",
    "a4953eljtr-t-hero.overlay.json",
    "a4953eljtr-t-etched.glb"
  ],
  "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": {
      "symbol": "a4953eljtr-t.kicad_sym",
      "footprint": "a4953eljtr-t.kicad_mod",
      "model_3d": "a4953eljtr-t-hero.glb",
      "model_3d_plain": "a4953eljtr-t-etched.glb",
      "model_3d_step": "a4953eljtr-t-etched.step",
      "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"
      }
    },
    "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": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "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: The exposed pad has no pin number in the datasheet (listed as PAD, number '–'). The land pattern ref; LSS is a power return and sense connection with no ERC class given in the datasheet. I chose passive"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0975,
        "at": "2026-10-22T23:08:56"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/4cadb7a6993e469ba8a45e8db15d6aeb.pdf",
        "pages": 11,
        "sha256": "9b8c176dcbf20a12",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "a4953eljtr-t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2d6f7e774e8143e3320cbd59eb5be9f3b7864614644e3b072006e1eb05fb7fa6",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "a4953eljtr-t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          4.9,
          1.55
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6be607ab5010d72c953bf4db7c64e880ca58e3c8a7cd7a643a951c1c75bd412e",
        "checked": "2026-10-22",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}