A4956KLPTR-T

{
  "slug": "a4956klptr-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",
    "a4956klptr-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "a4956klptr-t.kicad_sym",
    "a4956klptr-t.kicad_mod",
    "a4956klptr-t.glb",
    "a4956klptr-t.step",
    "a4956klptr-t.lbr",
    "docs/hero.png",
    "docs/a4956klptr-t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "a4956klptr-t-hero.glb",
    "a4956klptr-t-hero.overlay.json",
    "a4956klptr-t-etched.glb"
  ],
  "component": {
    "mpn": "A4956KLPTR-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/cf725cf80beb0b470c5504791f360f11.pdf",
    "parts": {
      "symbol": "a4956klptr-t.kicad_sym",
      "footprint": "a4956klptr-t.kicad_mod",
      "model_3d": "a4956klptr-t-hero.glb",
      "model_3d_plain": "a4956klptr-t-etched.glb",
      "model_3d_step": "a4956klptr-t-etched.step",
      "model_3d_step_plain": "a4956klptr-t.step",
      "lbr": "a4956klptr-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C2688272",
      "digikey": "620-A4956KLPTR-TTR-ND",
      "mouser": "250-A4956KLPTR-T"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T00:38:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "620-A4956KLPTR-TTR-ND",
        "status": "found",
        "lifecycle": "Not For New Designs"
      },
      "mouser": {
        "pn": "250-A4956KLPTR-T",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground terminal for the device, listed in the terminal table as Ground."
      },
      {
        "number": "2",
        "name": "AIOUT",
        "type": "output",
        "description": "Analog output proportional to VSENSE, with a gain of 9 to 11 V/V (VAIOUT/VSENSE for VSENSE = 50 to 200 mV) and an output impedance of 0.75 to 1.45 kΩ."
      },
      {
        "number": "3",
        "name": "OCLn",
        "type": "output",
        "description": "Open-drain overcurrent and VDS-fault flag that is driven low during PWM current limiting or a latched VDS fault, with leakage of 5 µA maximum at 5 V in normal operation."
      },
      {
        "number": "4",
        "name": "VREF",
        "type": "power_in",
        "description": "Analog overcurrent reference input with a range of 0 to 2.5 V that sets the peak current via I = VREF / (10 × RSENSE); absolute maximum rating is -0.3 to 5.5 V."
      },
      {
        "number": "5",
        "name": "ENABLE",
        "type": "input",
        "description": "Digital enable input with VIH minimum of 2.0 V, VIL maximum of 0.8 V, 30 to 70 kΩ pull-down, and an absolute maximum rating of -0.3 to 5.5 V; held low for about 1 ms enters standby."
      },
      {
        "number": "6",
        "name": "PHASE",
        "type": "input",
        "description": "Digital phase input that selects bridge direction, with VIH minimum of 2.0 V, VIL maximum of 0.8 V, and an absolute maximum rating of -0.3 to 5.5 V."
      },
      {
        "number": "7",
        "name": "RC",
        "type": "passive",
        "description": "Terminal for an external RC network to ground that sets the fixed off-time and blank-time, with RRC of 12 to 100 kΩ and CRC of 470 to 1500 pF for the off-time equation."
      },
      {
        "number": "8",
        "name": "ISET",
        "type": "passive",
        "description": "Terminal for a resistor to ground that sets the gate drive current, with RISET recommended between 15 and 150 kΩ."
      },
      {
        "number": "9",
        "name": "MODE",
        "type": "input",
        "description": "Digital mode input that selects slow decay when logic high or fast decay when logic low on ENABLE low, with an absolute maximum rating of -0.3 to 5.5 V."
      },
      {
        "number": "10",
        "name": "SENSE",
        "type": "passive",
        "description": "Sense resistor connection and low-side gate return, with an absolute maximum rating of -0.5 to 0.5 V (-4 to 4 V for tW < 500 ns)."
      },
      {
        "number": "11",
        "name": "GLB",
        "type": "output",
        "description": "Low-side gate drive output for the B half-bridge, with VGL of 6.5 to 7.5 V at VBB of 8 to 50 V."
      },
      {
        "number": "12",
        "name": "GLA",
        "type": "output",
        "description": "Low-side gate drive output for the A half-bridge, with VGL of 6.5 to 7.5 V at VBB of 8 to 50 V."
      },
      {
        "number": "13",
        "name": "GHB",
        "type": "output",
        "description": "High-side gate drive output for the B half-bridge, with VGH of 6.5 to 7.5 V relative to VBB at VBB of 8 to 50 V."
      },
      {
        "number": "14",
        "name": "SB",
        "type": "passive",
        "description": "High-side bridge reference for the B half-bridge, with motor output voltage VSx rated -2 to 52 V per the absolute maximum ratings."
      },
      {
        "number": "15",
        "name": "GHA",
        "type": "output",
        "description": "High-side gate drive output for the A half-bridge, with VGH of 6.5 to 7.5 V relative to VBB at VBB of 8 to 50 V."
      },
      {
        "number": "16",
        "name": "SA",
        "type": "passive",
        "description": "High-side bridge reference for the A half-bridge, with motor output voltage VSx rated -2 to 52 V per the absolute maximum ratings."
      },
      {
        "number": "17",
        "name": "VCP",
        "type": "power_out",
        "description": "Charge pump reservoir capacitor connection, which is internally monitored so that a low VCP fault disables the outputs."
      },
      {
        "number": "18",
        "name": "CP2",
        "type": "passive",
        "description": "Charge pump terminal used to generate a supply above VBB for the high-side MOSFETs."
      },
      {
        "number": "19",
        "name": "VBB",
        "type": "power_in",
        "description": "Load supply voltage with an absolute maximum rating of 50 V; the UVLO enable threshold is 5.10 to 5.40 V rising."
      },
      {
        "number": "20",
        "name": "CP1",
        "type": "passive",
        "description": "Charge pump terminal used to generate a supply above VBB for the high-side MOSFETs."
      },
      {
        "number": "21",
        "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-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 MPN A4956KLPTR-T is the LP (20-lead eTSSOP with exposed thermal pad) variant per the selection g; The exposed thermal pad (PAD) is not a numbered terminal and is therefore not listed in the pins arr; The datasheet footnote on page 2 states that the A4956KLPTR-T is NOT FOR NEW DESIGN, samples are no ",
          "exposed pad 21 added from the footprint",
          "2/21 pins cited to the wrong page (name found elsewhere): ['17:VCP@p7', '18:CP2@p7']"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0644,
        "at": "2026-10-31T00:37:53"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/cf725cf80beb0b470c5504791f360f11.pdf",
        "pages": 11,
        "sha256": "28580082f838a5f5",
        "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": "a4956klptr-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": "fd341b5b1ce4f399fe3733dc75f652fb5035c0ffe7e791080be7ffde3cdd064e",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "a4956klptr-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": "7607725c5c1edc8130c328de92c07066f1b21ae8615b0a21584ef1558e75caa3",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "LP",
      "source_page": 10,
      "D": {
        "nom_mm": 6.5,
        "range_mm": [
          null,
          null
        ]
      },
      "E1": {
        "nom_mm": 4.4,
        "range_mm": [
          null,
          null
        ]
      },
      "E": {
        "nom_mm": 6.4,
        "range_mm": [
          null,
          null
        ]
      },
      "e": {
        "nom_mm": 0.65,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.2,
        "range_mm": [
          null,
          1.2
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "a4956klptr-t.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}