A4956GLPTR-T

{
  "schema_version": 1,
  "type": "component",
  "slug": "a4956glptr-t",
  "title": "A4956GLPTR-T",
  "brief": "Allegro MicroSystems, LLC Motor Driver ICs, TSSOP-20-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",
    "a4956glptr-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "A4956GLPTR-T",
    "manufacturer": "Allegro MicroSystems, LLC",
    "package": "TSSOP-20-EP",
    "pin_count": 21,
    "category": "Power Management ICs",
    "subcategory": "Motor Driver ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/47dd9677932c66c53055f7617f9cfa43.pdf",
    "parts": {
      "symbol": "a4956glptr-t.kicad_sym",
      "footprint": "a4956glptr-t.kicad_mod",
      "model_3d": "a4956glptr-t-hero.glb",
      "model_3d_plain": "a4956glptr-t-etched.glb",
      "model_3d_step": "a4956glptr-t-etched.step",
      "model_3d_step_plain": "a4956glptr-t.step",
      "lbr": "a4956glptr-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C2150498",
      "digikey": "620-1773-2-ND",
      "mouser": "250-A4956GLPTR-T"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T23:01:04Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "620-1773-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "250-A4956GLPTR-T",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return for the device; the datasheet gives no numeric limit for this pin."
      },
      {
        "number": "2",
        "name": "AIOUT",
        "type": "output",
        "description": "Analog output proportional to VSENSE with a gain of 9 to 11 V/V (VSENSE = 50 to 200 mV) and an output impedance of 0.75 to 1.45 kΩ, absolute maximum -0.3 to 5.5 V."
      },
      {
        "number": "3",
        "name": "OCLn",
        "type": "output",
        "description": "Open-drain overcurrent and VDS-fault flag output, driven low at up to 0.3 V with 2 mA sink, with absolute maximum -0.3 to 5.5 V."
      },
      {
        "number": "4",
        "name": "VREF",
        "type": "power_in",
        "description": "Analog overcurrent reference input with a valid range of 0 to 2.5 V and absolute maximum -0.3 to 5.5 V; it sets the peak current limit via VREF/(10 × RSENSE)."
      },
      {
        "number": "5",
        "name": "ENABLE",
        "type": "input",
        "description": "Digital enable input with VIH minimum 2.0 V and VIL maximum 0.8 V; holding it low for about 1 ms (tSTB, typical) enters low-power standby mode."
      },
      {
        "number": "6",
        "name": "PHASE",
        "type": "input",
        "description": "Digital phase input that sets the bridge direction, with VIH minimum 2.0 V, VIL maximum 0.8 V, and absolute maximum 5.5 V."
      },
      {
        "number": "7",
        "name": "RC",
        "type": "passive",
        "description": "Connection for the external RC network to ground that sets fixed off-time and blank-time, using RRC of 12 to 100 kΩ and CRC of 470 to 1500 pF."
      },
      {
        "number": "8",
        "name": "ISET",
        "type": "passive",
        "description": "A resistor from this terminal to ground sets the gate drive current, with RISET specified between 15 and 150 kΩ."
      },
      {
        "number": "9",
        "name": "MODE",
        "type": "input",
        "description": "Digital input that selects slow decay (logic high) or fast decay (logic low) when ENABLE goes low, with VIH minimum 2.0 V and VIL maximum 0.8 V."
      },
      {
        "number": "10",
        "name": "SENSE",
        "type": "passive",
        "description": "Sense resistor connection and low-side gate return, rated -0.5 to 0.5 V continuous and -4 to 4 V for tW < 500 ns."
      },
      {
        "number": "11",
        "name": "GLB",
        "type": "output",
        "description": "Low-side gate drive output for half-bridge B, specified at 6.5 to 7.5 V (VBB = 8 to 50 V, IGATE = 200 µA)."
      },
      {
        "number": "12",
        "name": "GLA",
        "type": "output",
        "description": "Low-side gate drive output for half-bridge A, specified at 6.5 to 7.5 V (VBB = 8 to 50 V, IGATE = 200 µA)."
      },
      {
        "number": "13",
        "name": "GHB",
        "type": "output",
        "description": "High-side gate drive output for half-bridge B, specified at 6.5 to 7.5 V relative to VBB (VBB = 8 to 50 V, IGATE = 200 µA)."
      },
      {
        "number": "14",
        "name": "SB",
        "type": "passive",
        "description": "High-side bridge reference connection for half-bridge B, with the motor output voltage range of -2 to 52 V relative to VBB."
      },
      {
        "number": "15",
        "name": "GHA",
        "type": "output",
        "description": "High-side gate drive output for half-bridge A, specified at 6.5 to 7.5 V relative to VBB (VBB = 8 to 50 V, IGATE = 200 µA)."
      },
      {
        "number": "16",
        "name": "SA",
        "type": "passive",
        "description": "High-side bridge reference connection for half-bridge A, with the motor output voltage range of -2 to 52 V relative to VBB."
      },
      {
        "number": "17",
        "name": "VCP",
        "type": "passive",
        "description": "Charge pump reservoir capacitor connection, monitored internally, with outputs disabled on a low-VCP fault."
      },
      {
        "number": "18",
        "name": "CP2",
        "type": "passive",
        "description": "Charge pump terminal for the internal charge pump generating the high-side gate supply above VBB."
      },
      {
        "number": "19",
        "name": "VBB",
        "type": "power_in",
        "description": "Load supply voltage with absolute maximum 50 V; the internal UVLO enables at 5.10 to 5.40 V (rising)."
      },
      {
        "number": "20",
        "name": "CP1",
        "type": "passive",
        "description": "Charge pump terminal for the internal charge pump generating the high-side gate supply above VBB."
      },
      {
        "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 (labelled PAD in the terminal list) has no printed pin number and its electr; The datasheet does not give KiCad ERC types for pins. Types were assigned from the pin functions des; Pin descriptions for GHx/GLx and SA/SB are taken from the electrical characteristics and absolute ma",
          "exposed pad 21 added from the footprint",
          "2/21 pins cited to the wrong page (name found elsewhere): ['17:VCP@p7', '18:CP2@p8']"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0659,
        "at": "2026-10-28T23:00:34"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/47dd9677932c66c53055f7617f9cfa43.pdf",
        "pages": 11,
        "sha256": "139b044dfc18bf37",
        "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": "a4956glptr-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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e660502f4920f0e05bb7529a379756e5791a2ceb244ad3735ca55c651cd3786f",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "a4956glptr-t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5a714dcc887a0d5518bdeb4b0bee18ecca53abc850d78c7bae87a84431df3f56",
        "checked": "2026-10-28",
        "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": [
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        ]
      },
      "E": {
        "nom_mm": 6.4,
        "range_mm": [
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      },
      "e": {
        "nom_mm": 0.65,
        "range_mm": [
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      },
      "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": "a4956glptr-t.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Allegro MicroSystems, LLC",
      "Package": "TSSOP-20-EP",
      "Category": "Power Management ICs",
      "Pins": "21"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "139b044dfc18bf3728d766c17dda2625625a0dfcdeec6895a58fc25b0b535a82",
      "rows": [
        {
          "name": "Load Supply Voltage",
          "symbol": "VBB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Motor Outputs",
          "symbol": "VSx",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -2,
          "typ": null,
          "max": 52,
          "conditions": "VSx – VSENSE; VBB – VSx",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "SENSE",
          "symbol": "VSENSE",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "SENSE transient",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -4,
          "typ": null,
          "max": 4,
          "conditions": "tW < 500 ns",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "OCLn",
          "symbol": "VOCLn",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "VREF",
          "symbol": "VREF",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "ISET",
          "symbol": "VISET",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "AIOUT",
          "symbol": "VAIOUT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage Range",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "PHASE, ENABLE, MODE",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range, Range G",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 105,
          "conditions": "Range G (this part; A4956GLPTR-T)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient, LP (eTSSOP) package",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 28,
          "max": null,
          "conditions": "4-Layer PCB, 1 in.2 Cu",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage operating range",
          "symbol": "VBB",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 5.5,
          "typ": null,
          "max": 50,
          "conditions": "Electrical characteristics header: Range G at TJ = 25°C, VBB = 5.5 to 50 V, unless otherwise specified",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VBB Supply Current",
          "symbol": "IBB",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 6,
          "max": 10,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Standby supply current",
          "symbol": "IBB",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "SLEEPn = low, Standby Mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High-Side Gate Drive Output",
          "symbol": "VGH",
          "kind": "electrical",
          "unit": "V",
          "min": 6.5,
          "typ": 6.8,
          "max": 7.5,
          "conditions": "Relative to VBB, IGATE = 200 µA, VBB = 8 to 50 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Low-Side Gate Drive Output",
          "symbol": "VGL",
          "kind": "electrical",
          "unit": "V",
          "min": 6.5,
          "typ": 6.8,
          "max": 7.5,
          "conditions": "IGATE = 200 µA, VBB = 8 to 50 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Gate Drive Pull-Up Current",
          "symbol": "IGPU",
          "kind": "electrical",
          "unit": "mA",
          "min": 21,
          "typ": 30,
          "max": 39,
          "conditions": "RISET = 30 kΩ; VGH = VGL = 4 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Gate Drive Pull-Down Current",
          "symbol": "IGPD",
          "kind": "electrical",
          "unit": "mA",
          "min": 47,
          "typ": 68,
          "max": 89,
          "conditions": "RISET = 30 kΩ; VGH = VGL = 4 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Passive Pull-Down Resistance",
          "symbol": "RGPD",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 30,
          "typ": 50,
          "max": 70,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic Output Voltage",
          "symbol": "VOCLn",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.2,
          "max": 0.3,
          "conditions": "I = 2 mA, overcurrent detected",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic Output Leakage",
          "symbol": "IOCLn",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "V = 5 V, normal operation",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "PWM Current Limit Flag Timer",
          "symbol": "tOCLn",
          "kind": "timing",
          "unit": "µs",
          "min": 300,
          "typ": 500,
          "max": 600,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage High",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage Low",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage Low, standby",
          "symbol": "VIL(STANDBY)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "Standby Mode, ENABLE input",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Pull-Down Resistor",
          "symbol": "RPD",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 30,
          "typ": 50,
          "max": 70,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VREF Input Current",
          "symbol": "IVREF",
          "kind": "electrical",
          "unit": "µA",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "VREF = 2.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VREF Input Range",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 2.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Current Gain",
          "symbol": "AV",
          "kind": "electrical",
          "unit": "V/V",
          "min": 9.5,
          "typ": null,
          "max": 10.5,
          "conditions": "VREF / VSENSE, VREF = 2.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Offset, SENSE",
          "symbol": "VOSSENSE",
          "kind": "electrical",
          "unit": "mV",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Blank-Time",
          "symbol": "tBLK",
          "kind": "timing",
          "unit": "µs",
          "min": 2.1,
          "typ": 3,
          "max": 3.9,
          "conditions": "RRC = 30 kΩ, CRC = 1 nF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Standby Timer",
          "symbol": "",
          "kind": "timing",
          "unit": "ms",
          "min": 0.7,
          "typ": 1,
          "max": 1.3,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power-Up Delay",
          "symbol": "tpu",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": 50,
          "max": 300,
          "conditions": "Time until outputs are enabled",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "AIOUT Gain",
          "symbol": "AIOUT",
          "kind": "electrical",
          "unit": "V/V",
          "min": 9,
          "typ": 10,
          "max": 11,
          "conditions": "VAIOUT / VSENSE, VSENSE = 50 to 200 mV",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Offset, AIOUT",
          "symbol": "VOSAIOUT",
          "kind": "electrical",
          "unit": "mV",
          "min": -15,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Sample-and-Hold Droop Rate",
          "symbol": "VDROOP",
          "kind": "electrical",
          "unit": "mV/µs",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "AIOUT Output Impedance",
          "symbol": "ROUT(AIOUT)",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 0.75,
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