main
Ray Set visibility: public 0ad219b 9d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "a3916gestr-t-1",
  "title": "A3916GESTR-T-1",
  "brief": "Allegro MicroSystems LLC Stepper Motor Driver, QFN-20-EP(4x4). 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",
    "a3916gestr-t-1",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "A3916GESTR-T-1",
    "manufacturer": "Allegro MicroSystems LLC",
    "package": "QFN-20-EP(4x4)",
    "pin_count": 21,
    "category": "Motor Driver ICs",
    "subcategory": "Stepper Motor Driver",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893307762053120",
    "parts": {
      "symbol": "a3916gestr-t-1.kicad_sym",
      "footprint": "a3916gestr-t-1.kicad_mod",
      "model_3d": "a3916gestr-t-1-hero.glb",
      "model_3d_plain": "a3916gestr-t-1-etched.glb",
      "model_3d_step": "a3916gestr-t-1-etched.step",
      "model_3d_step_plain": "a3916gestr-t-1.step",
      "lbr": "a3916gestr-t-1.lbr"
    },
    "distributor_links": {
      "lcsc": "C156195"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T16:14:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection on the 20-contact ES,-1 package."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground terminal for the device, serving as the ground reference for the A3916."
      },
      {
        "number": "3",
        "name": "SLEEPn",
        "type": "input",
        "description": "Active-low sleep input where a logic high allows normal operation, with VIN(1) of at least 2.0 V and VIN(0) of at most 0.4 V, and the device needs 1.5 ms after leaving sleep before a command is issued."
      },
      {
        "number": "4",
        "name": "IN1",
        "type": "input",
        "description": "Bridge 1 control input with VIN(1) of at least 2.0 V, VIN(0) of at most 0.8 V, and a logic input voltage range of -0.3 to 5.5 V."
      },
      {
        "number": "5",
        "name": "IN2",
        "type": "input",
        "description": "Bridge 1 control input with VIN(1) of at least 2.0 V, VIN(0) of at most 0.8 V, and a logic input voltage range of -0.3 to 5.5 V."
      },
      {
        "number": "6",
        "name": "IN3",
        "type": "input",
        "description": "Bridge 2 control input with VIN(1) of at least 2.0 V, VIN(0) of at most 0.8 V, and a logic input voltage range of -0.3 to 5.5 V."
      },
      {
        "number": "7",
        "name": "IN4",
        "type": "input",
        "description": "Bridge 2 control input with VIN(1) of at least 2.0 V, VIN(0) of at most 0.8 V, and a logic input voltage range of -0.3 to 5.5 V."
      },
      {
        "number": "8",
        "name": "FAULTn",
        "type": "output",
        "description": "Open-drain fault output pulled low during a thermal shutdown or overcurrent protection event, with VFAULTn of at most 200 mV at 1 mA when asserted."
      },
      {
        "number": "9",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection on the 20-contact ES,-1 package."
      },
      {
        "number": "10",
        "name": "OUT2A",
        "type": "output",
        "description": "DMOS H-bridge 2, output A, driving the bridge 2 motor winding."
      },
      {
        "number": "11",
        "name": "SENSE2",
        "type": "passive",
        "description": "Sense resistor terminal for bridge 2; the SENSEx rating is 0.5 V continuous and 2.5 V pulsed for under 1 µs, and tying it to ground disables internal current limiting."
      },
      {
        "number": "12",
        "name": "OUT2B",
        "type": "output",
        "description": "DMOS H-bridge 2, output B, driving the bridge 2 motor winding."
      },
      {
        "number": "13",
        "name": "VBB",
        "type": "power_in",
        "description": "Motor supply voltage with an operating range of 2.7 to 15 V and an absolute maximum of 15 V."
      },
      {
        "number": "14",
        "name": "OUT1B",
        "type": "output",
        "description": "DMOS H-bridge 1, output B, driving the bridge 1 motor winding."
      },
      {
        "number": "15",
        "name": "SENSE1",
        "type": "passive",
        "description": "Sense resistor terminal for bridge 1; the SENSEx rating is 0.5 V continuous and 2.5 V pulsed for under 1 µs, and tying it to ground disables internal current limiting."
      },
      {
        "number": "16",
        "name": "OUT1A",
        "type": "output",
        "description": "DMOS H-bridge 1, output A, driving the bridge 1 motor winding."
      },
      {
        "number": "17",
        "name": "VCP",
        "type": "passive",
        "description": "Charge pump capacitor connection, which the application circuit shows with a 0.1 µF capacitor."
      },
      {
        "number": "18",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection on the 20-contact ES,-1 package."
      },
      {
        "number": "19",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection on the 20-contact ES,-1 package."
      },
      {
        "number": "20",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection on the 20-contact ES,-1 package."
      },
      {
        "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 exposed pad has no printed number in the terminal list (shown as '–'), so it is listed as 'PAD'.; The 20-contact pin diagram text on page 3 is scrambled in extraction. The pin-to-name mapping here c; The datasheet gives no electrical-type classification for SENSEx or VCP beyond their function; they ",
          "exposed pad 21 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0643,
        "at": "2026-10-17T16:13:22"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893307762053120",
        "pages": 11,
        "sha256": "50e67b813f034161",
        "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": "a3916gestr-t-1.step",
        "role": "plain",
        "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": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "a3916gestr-t-1-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
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        "sha256": "331e67cc44e1775ec8efdaf1ea842b37189aab28561ba5de44589d9b3de77667",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Allegro MicroSystems LLC",
      "Package": "QFN-20-EP(4x4)",
      "Category": "Motor Driver ICs",
      "Pins": "21"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "50e67b813f0341612bd048be004721bbd77c6b7818f920a83eeb7991c05f1bf6",
      "rows": [
        {
          "name": "Supply Voltage (absolute maximum)",
          "symbol": "VBB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Current (absolute maximum)",
          "symbol": "IOUT",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "Continuous",
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          "source": "datasheet"
        },
        {
          "name": "Output Current, parallel mode (absolute maximum)",
          "symbol": "IOUT(PAR)",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1.8,
          "conditions": "Continuous",
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          "source": "datasheet"
        },
        {
          "name": "Sense Voltage (absolute maximum)",
          "symbol": "VSENSEx",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "Continuous",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Sense Voltage (absolute maximum)",
          "symbol": "VSENSEx",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 2.5,
          "conditions": "Pulsed, tw < 1 µs",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage Range (absolute maximum)",
          "symbol": "VIO",
          "kind": "absolute_maximum",
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          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature (absolute maximum)",
          "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": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 105,
          "conditions": "Range G",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Load Supply Voltage Range",
          "symbol": "VBB",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 15,
          "conditions": "Operating",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output On Resistance, high side",
          "symbol": "RDS(ON,HS)",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 335,
          "max": 450,
          "conditions": "TJ = 25°C, 500 mA, VBB = 5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output On Resistance, low side",
          "symbol": "RDS(ON,LS)",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 375,
          "max": 525,
          "conditions": "TJ = 25°C, 500 mA, VBB = 5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Diode Forward Voltage",
          "symbol": "VF",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.85,
          "max": 1,
          "conditions": "I = 500 mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VBB Supply Current, 2.7 V",
          "symbol": "IBB(2p7V)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.2,
          "max": 4.5,
          "conditions": "Outputs disabled, VBB = 2.7 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VBB Supply Current, 15 V",
          "symbol": "IBB(15V)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.1,
          "max": 4.5,
          "conditions": "Outputs disabled, VBB = 15 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VBB Supply Current, sleep mode",
          "symbol": "IBB(SLEEP)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "Sleep Mode",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage, INx high",
          "symbol": "VIN(1)",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage, INx low",
          "symbol": "VIN(0)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage, SLEEPn high",
          "symbol": "VIN(1)",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Voltage, SLEEPn low",
          "symbol": "VIN(0)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Hysteresis",
          "symbol": "VHYS",
          "kind": "electrical",
          "unit": "mV",
          "min": 100,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 33,
          "max": 50,
          "conditions": "VIN = 3.3 V, pulldown = 100 kΩ",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Fault Output Voltage",
          "symbol": "VFAULTn",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "Flag asserted, IFAULTn = 1 mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Fault Output Leakage Current",
          "symbol": "IFAULTn",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VFAULTn = 5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VSENSE Blank time",
          "symbol": "tBLANK",
          "kind": "timing",
          "unit": "µs",
          "min": 2.1,
          "typ": 3.1,
          "max": 4.1,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VSENSE Trip Voltage",
          "symbol": "VTRIP",
          "kind": "electrical",
          "unit": "mV",
          "min": 170,
          "typ": 205,
          "max": 240,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Fixed Off-Time",
          "symbol": "tOFF",
          "kind": "timing",
          "unit": "µs",
          "min": 20,
          "typ": 30,
          "max": 40,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Crossover Delay",
          "symbol": "tOCD",
          "kind": "timing",
          "unit": "ns",
          "min": 200,
          "typ": 550,
          "max": 1000,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VBB Undervoltage Lockout",
          "symbol": "VBB(UVLO)",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 2.55,
          "max": 2.65,
          "conditions": "VBB rising",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Temperature",
          "symbol": "TJ1",
          "kind": "electrical",
          "unit": "°C",
          "min": 150,
          "typ": 165,
          "max": 180,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VBB Hysteresis",
          "symbol": "VBB(UVLO,HYS)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 125,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Hysteresis",
          "symbol": "ΔTJ1",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient, 4 × 4 mm ES-1 package",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 37,
          "max": null,
          "conditions": "4-layer PCB based on JEDEC standard",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
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  ],
  "discovery_triggers": [
    "a3916gestr-t-1"
  ],
  "discovery_pitch": "A3916GESTR-T-1 (Allegro MicroSystems LLC) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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