A3918SESTR-T

{
  "schema_version": 1,
  "type": "component",
  "slug": "a3918sestr-t",
  "title": "A3918SESTR-T",
  "brief": "Allegro MicroSystems LLC Brushed DC Motor Drivers, QFN-16-EP(3x3). 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",
    "motor driver ics",
    "a3918sestr-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "A3918SESTR-T",
    "manufacturer": "Allegro MicroSystems LLC",
    "package": "QFN-16-EP(3x3)",
    "pin_count": 17,
    "category": "Motor Driver ICs",
    "subcategory": "Brushed DC Motor Drivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588930927317684224",
    "parts": {
      "symbol": "a3918sestr-t.kicad_sym",
      "footprint": "a3918sestr-t.kicad_mod",
      "model_3d": "a3918sestr-t-hero.glb",
      "model_3d_plain": "a3918sestr-t-etched.glb",
      "model_3d_step": "a3918sestr-t-etched.step",
      "model_3d_step_plain": "a3918sestr-t.step",
      "lbr": "a3918sestr-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C2649429",
      "digikey": "620-1476-2-ND",
      "mouser": "250-A3918SESTR-T"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T01:58:39Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "620-1476-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "250-A3918SESTR-T",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CP2",
        "type": "passive",
        "description": "Charge pump capacitor terminal 2; a 0.1 µF ceramic capacitor connects between CP1 and CP2 for pumping."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground terminal that should connect to a low-impedance single-point star ground located very close to the device."
      },
      {
        "number": "3",
        "name": "SLEEP",
        "type": "input",
        "description": "Active-low sleep logic input; VIN below 0.4 V puts the device in sleep mode (150 nA typ, 500 nA max) and a logic high allows normal operation."
      },
      {
        "number": "4",
        "name": "IN1",
        "type": "input",
        "description": "Control input 1 for PWM and direction control, with VIN(1) min 2.0 V, VIN(0) max 0.8 V, and absolute logic input range -0.3 to 7 V."
      },
      {
        "number": "5",
        "name": "IN2",
        "type": "input",
        "description": "Control input 2 for PWM and direction control, with VIN(1) min 2.0 V, VIN(0) max 0.8 V, and absolute logic input range -0.3 to 7 V."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground terminal that should connect to a low-impedance single-point star ground located very close to the device."
      },
      {
        "number": "7",
        "name": "FL",
        "type": "output",
        "description": "Current limit flag output that is pulled low when the peak current is reached, with asserted voltage max 200 mV at 1 mA and leakage max 1 µA; it does not affect driver operation."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground terminal that should connect to a low-impedance single-point star ground located very close to the device."
      },
      {
        "number": "9",
        "name": "VBB",
        "type": "power_in",
        "description": "Load supply voltage with operating range 2.5 to 9 V and absolute maximum 9.6 V."
      },
      {
        "number": "10",
        "name": "OUTB",
        "type": "output",
        "description": "DMOS full-bridge output B driving the motor winding, with continuous output current rated at 1 A and peak 1.5 A (DC < 30%)."
      },
      {
        "number": "11",
        "name": "SENSE",
        "type": "passive",
        "description": "Current sense resistor terminal whose voltage must not exceed 0.5 V continuous or 1 V pulsed (tw < 1 µs), and which should be shorted to ground if internal current limiting is not used."
      },
      {
        "number": "12",
        "name": "OUTA",
        "type": "output",
        "description": "DMOS full-bridge output A driving the motor winding, with continuous output current rated at 1 A and peak 1.5 A (DC < 30%)."
      },
      {
        "number": "13",
        "name": "VCP",
        "type": "passive",
        "description": "Reservoir capacitor terminal; a 0.1 µF ceramic capacitor is required between VCP and VBB to supply the high-side DMOS gates."
      },
      {
        "number": "14",
        "name": "CP3",
        "type": "passive",
        "description": "Charge pump capacitor terminal 3; a 0.1 µF ceramic capacitor connects between CP3 and CP4 for pumping."
      },
      {
        "number": "15",
        "name": "CP1",
        "type": "passive",
        "description": "Charge pump capacitor terminal 1; a 0.1 µF ceramic capacitor connects between CP1 and CP2 for pumping."
      },
      {
        "number": "16",
        "name": "CP4",
        "type": "passive",
        "description": "Charge pump capacitor terminal 4; a 0.1 µF ceramic capacitor connects between CP3 and CP4 for pumping."
      },
      {
        "number": "17",
        "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 exposed thermal pad is shown as '–' in the terminal list and as 'PAD' in the pin-out diagram, so; Pin types for the charge pump terminals (CP1-CP4) and VCP, and for SENSE, are inferred from their st; Pin-out diagram text on page 2 is garbled in extraction; pin numbers were taken from the TERMINAL LI",
          "exposed pad 17 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0529,
        "at": "2026-10-21T01:56:01"
      },
      "datasheet": {
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        "pages": 9,
        "sha256": "3987b834a8bd9efc",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Allegro MicroSystems LLC",
      "Package": "QFN-16-EP(3x3)",
      "Category": "Motor Driver ICs",
      "Pins": "17"
    },
    "appearance": {
      "contacts": {
        "quote": "thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.",
        "page": 1,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "3987b834a8bd9efc60304d9dd2836aa753537544ba1ea1835dd9cdd5daca8694"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
        {
          "name": "Load Supply Voltage",
          "symbol": "VBB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 9.6,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage Range",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Sense Voltage, continuous",
          "symbol": "VSENSE",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "Continuous",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Sense Voltage, pulsed",
          "symbol": "VSENSE",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Pulsed, tw < 1 µs",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Current, continuous",
          "symbol": "IOUT",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Continuous; may be limited by duty cycle, ambient temperature, and heat sinking",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Current, peak",
          "symbol": "IOUT",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "Peak, DC < 30%",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -20,
          "typ": null,
          "max": 85,
          "conditions": "Range S",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ(max)",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Package Thermal Resistance",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "ºC/W",
          "min": null,
          "typ": 42,
          "max": null,
          "conditions": "4-layer PCB based on JEDEC standard",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Voltage Range",
          "symbol": "VBB",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": 9,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VBB Supply Current (sleep mode)",
          "symbol": "IBB",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 150,
          "max": 500,
          "conditions": "Sleep mode, VIN < 0.4 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Resistance, source driver",
          "symbol": "RDS(on)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.52,
          "max": 0.6,
          "conditions": "Source driver, IOUT = 400 mA, VBB = 3 V, TJ = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Resistance, sink driver",
          "symbol": "RDS(on)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.62,
          "max": 0.74,
          "conditions": "Sink driver, IOUT = 400 mA, VBB = 3 V, TJ = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Trip Sense Voltage",
          "symbol": "VSENSE",
          "kind": "electrical",
          "unit": "mV",
          "min": 160,
          "typ": 200,
          "max": 240,
          "conditions": "FL falling edge",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Clamp Diode Voltage",
          "symbol": "Vf",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "I = 400 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Leakage Current",
          "symbol": "IDSS",
          "kind": "electrical",
          "unit": "µA",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "Outputs, VOUT = 9 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage, high",
          "symbol": "VIN(1)",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage, low",
          "symbol": "VIN(0)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Current, high",
          "symbol": "IIN(1)",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "VIN = 5.5 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Current, low",
          "symbol": "IIN(0)",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": null,
          "max": -500,
          "conditions": "VIN = 0.8 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SLEEP Input Voltage, low",
          "symbol": "VSLEEP(0)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SLEEP Input Voltage, high",
          "symbol": "VSLEEP(1)",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Fault Output Voltage",
          "symbol": "VFL",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "Flag asserted, IFL = 1 mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Fault Output Leakage Current",
          "symbol": "IFL",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VFL = 5 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Blank Time",
          "symbol": "tBLANK",
          "kind": "timing",
          "unit": "µs",
          "min": 2.1,
          "typ": 3,
          "max": 3.9,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay Time, on",
          "symbol": "tpd(on)",
          "kind": "timing",
          "unit": "ns",
          "min": 100,
          "typ": 235,
          "max": 350,
          "conditions": "Input high to source on, input low to source off",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay Time, off",
          "symbol": "tpd(off)",
          "kind": "timing",
          "unit": "ns",
          "min": 50,
          "typ": 100,
          "max": 200,
          "conditions": "Input low to sink off, input high to sink on",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Crossover Delay",
          "symbol": "tCOD",
          "kind": "timing",
          "unit": "ns",
          "min": 200,
          "typ": 425,
          "max": 650,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VBB Undervoltage Lockout Threshold",
          "symbol": "VBBUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": 2.2,
          "typ": 2.31,
          "max": 2.45,
          "conditions": "VBB rising",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VBB Undervoltage Lockout Hysteresis",
          "symbol": "VBBUVHYS",
          "kind": "electrical",
          "unit": "mV",
          "min": 200,
          "typ": 300,
          "max": 400,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
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  "discovery_pitch": "A3918SESTR-T (Allegro MicroSystems LLC) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
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    "name": "Ray",
    "email": "[email protected]"
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