A4992KLPTR-T

{
  "slug": "a4992klptr-t",
  "version": "0.1.0",
  "type": "component",
  "description": "Allegro MicroSystems, LLC Motor Driver ICs, TSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power supply chip",
    "a4992klptr-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "a4992klptr-t.kicad_sym",
    "a4992klptr-t.kicad_mod",
    "a4992klptr-t.glb",
    "a4992klptr-t.step",
    "a4992klptr-t.lbr",
    "docs/hero.png",
    "docs/a4992klptr-t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "a4992klptr-t-hero.glb",
    "a4992klptr-t-hero.overlay.json",
    "a4992klptr-t-etched.glb"
  ],
  "component": {
    "mpn": "A4992KLPTR-T",
    "manufacturer": "Allegro MicroSystems, LLC",
    "package": "TSSOP-20-EP",
    "pin_count": 21,
    "category": "Power Supply Chip",
    "subcategory": "Motor Driver ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/105b4f81448bc6cc3fbfd4dc286d5b97.pdf",
    "parts": {
      "symbol": "a4992klptr-t.kicad_sym",
      "footprint": "a4992klptr-t.kicad_mod",
      "model_3d": "a4992klptr-t-hero.glb",
      "model_3d_plain": "a4992klptr-t-etched.glb",
      "model_3d_step": "a4992klptr-t-etched.step",
      "model_3d_step_plain": "a4992klptr-t.step",
      "lbr": "a4992klptr-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C459295",
      "digikey": "620-1521-2-ND",
      "mouser": "250-A4992KLPTR-T"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T00:36:58Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "620-1521-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "250-A4992KLPTR-T",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SENSA",
        "type": "input",
        "description": "Phase A current sense; connect the sense resistor between SENSA and PGND, with SENSA rated -0.3 to 1 V with respect to PGND."
      },
      {
        "number": "2",
        "name": "OAP",
        "type": "output",
        "description": "Motor connection for phase A, positive terminal; positive phase current flows from OAM to OAP."
      },
      {
        "number": "3",
        "name": "RESETn",
        "type": "input",
        "description": "Resets faults when pulsed low and forces low-power sleep mode when held low longer than tRSD; can be pulled to VBB through 38 kΩ."
      },
      {
        "number": "4",
        "name": "DIR",
        "type": "input",
        "description": "Direction logic input with internal pull-down; in serial mode it is the SDI serial data input accepting a 16-bit MSB-first word."
      },
      {
        "number": "5",
        "name": "REF",
        "type": "input",
        "description": "Reference input that sets the absolute maximum current level for both phases; it defaults to the internal reference when driven above 2.5 V."
      },
      {
        "number": "6",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog reference ground and quiet return for measurement and input references; connect to PGND."
      },
      {
        "number": "7",
        "name": "MS",
        "type": "input",
        "description": "Microstep resolution select input with internal pull-down; in serial mode it is the SCK serial clock and must be held high when STEP changes."
      },
      {
        "number": "8",
        "name": "OBP",
        "type": "output",
        "description": "Motor connection for phase B, positive terminal; positive phase current flows from OBM to OBP."
      },
      {
        "number": "9",
        "name": "PGND",
        "type": "power_in",
        "description": "Digital and power ground; connect to the supply ground and to AGND."
      },
      {
        "number": "10",
        "name": "SENSB",
        "type": "input",
        "description": "Phase B current sense; connect the sense resistor between SENSB and PGND, with SENSB rated -0.3 to 1 V with respect to PGND."
      },
      {
        "number": "11",
        "name": "VBB",
        "type": "power_in",
        "description": "Main motor supply and chip supply for the internal regulators and charge pump; both VBB pins must be connected together and decoupled to ground."
      },
      {
        "number": "12",
        "name": "OBM",
        "type": "output",
        "description": "Motor connection for phase B, negative terminal."
      },
      {
        "number": "13",
        "name": "VREG",
        "type": "power_out",
        "description": "Regulated supply for bridge gate drive, decoupled to ground with a 470 nF (10 V) ceramic capacitor."
      },
      {
        "number": "14",
        "name": "DIAG",
        "type": "output",
        "description": "Diagnostic open-drain output, active low, indicating a fault when low; it requires an external pull-up resistor."
      },
      {
        "number": "15",
        "name": "STEP",
        "type": "input",
        "description": "Step logic input with internal pull-down; the motor advances on the rising edge, and in serial mode it is the active-low STRn serial data strobe."
      },
      {
        "number": "16",
        "name": "VCP",
        "type": "power_out",
        "description": "Above-supply voltage for high-side drive; a 100 nF (16 V) ceramic capacitor is connected between VCP and VBB."
      },
      {
        "number": "17",
        "name": "CP1",
        "type": "passive",
        "description": "Charge pump capacitor connection; a 100 nF (50 V) ceramic capacitor is connected between CP1 and CP2."
      },
      {
        "number": "18",
        "name": "CP2",
        "type": "passive",
        "description": "Charge pump capacitor connection; a 100 nF (50 V) ceramic capacitor is connected between CP1 and CP2."
      },
      {
        "number": "19",
        "name": "OAM",
        "type": "output",
        "description": "Motor connection for phase A, negative terminal; positive phase current flows from OAM to OAP."
      },
      {
        "number": "20",
        "name": "VBB",
        "type": "power_in",
        "description": "Main motor supply and chip supply for the internal regulators and charge pump; both VBB pins must be connected together and decoupled to ground."
      },
      {
        "number": "21",
        "name": "EP",
        "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 exposed thermal pad (PAD) is listed in the terminal list with no pin number (printed as a dash),; Pin descriptions are taken from the Pin Functions section on page 11. Only the Absolute Maximum Rati",
          "7/21 pins cited to the wrong page (name found elsewhere): ['7:MS@p11', '14:DIAG@p11', '15:STEP@p11', '17:CP1@p11']"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0241,
        "at": "2026-10-27T00:36:25"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/105b4f81448bc6cc3fbfd4dc286d5b97.pdf",
        "pages": 29,
        "sha256": "16cbf88bc32f0574",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "a4992klptr-t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.41,
          6.5,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b7d5b61e585e5097ad0b2ca5908cb3cc0c061ea0507fa8f3005445bab6251393",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "a4992klptr-t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.41,
          6.5,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "32250171b85c99419d077e68b18a18215f2aade5798d68e5959c8e2b082dbba1",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}