A5984GESTR-T

{
  "slug": "a5984gestr-t",
  "version": "0.1.0",
  "type": "component",
  "description": "Allegro MicroSystems LLC Stepper Motor Driver, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "motor driver ics",
    "a5984gestr-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "a5984gestr-t.kicad_sym",
    "a5984gestr-t.kicad_mod",
    "a5984gestr-t.glb",
    "a5984gestr-t.step",
    "a5984gestr-t.lbr",
    "docs/hero.png",
    "docs/a5984gestr-t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "a5984gestr-t-hero.glb",
    "a5984gestr-t-hero.overlay.json",
    "a5984gestr-t-etched.glb"
  ],
  "component": {
    "mpn": "A5984GESTR-T",
    "manufacturer": "Allegro MicroSystems LLC",
    "package": "QFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Motor Driver ICs",
    "subcategory": "Stepper Motor Driver",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588953508599517184",
    "parts": {
      "symbol": "a5984gestr-t.kicad_sym",
      "footprint": "a5984gestr-t.kicad_mod",
      "model_3d": "a5984gestr-t-hero.glb",
      "model_3d_plain": "a5984gestr-t-etched.glb",
      "model_3d_step": "a5984gestr-t-etched.step",
      "model_3d_step_plain": "a5984gestr-t.step",
      "lbr": "a5984gestr-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C2653533",
      "digikey": "620-1786-2-ND",
      "mouser": "250-A5984GESTR-T"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T00:04:34Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "620-1786-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "250-A5984GESTR-T",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OUT2B",
        "type": "output",
        "description": "DMOS full-bridge 2 output B; the output drive capacity of the device is up to 40 V and ±2 A."
      },
      {
        "number": "2",
        "name": "ENABLE",
        "type": "input",
        "description": "Logic input that disables all FET outputs when high and enables them as required when low, while STEP, DIR and MSx stay active regardless of its state."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; the GND pins must be tied together externally by connecting to the PAD ground plane under the device."
      },
      {
        "number": "4",
        "name": "CP1",
        "type": "passive",
        "description": "Charge pump capacitor terminal; a 0.1 µF ceramic capacitor (Class 2, ±15% max) is connected between CP1 and CP2."
      },
      {
        "number": "5",
        "name": "CP2",
        "type": "passive",
        "description": "Charge pump capacitor terminal; a 0.1 µF ceramic capacitor (Class 2, ±15% max) is connected between CP1 and CP2."
      },
      {
        "number": "6",
        "name": "VCP",
        "type": "passive",
        "description": "Reservoir capacitor terminal; a 0.1 µF ceramic capacitor is required between VCP and VBB to act as a reservoir for the high-side FET gates."
      },
      {
        "number": "7",
        "name": "nFAULT",
        "type": "output",
        "description": "Open-drain fault output, active low; it is enabled when an overcurrent event disables the device and latches the outputs off."
      },
      {
        "number": "8",
        "name": "MS1",
        "type": "input",
        "description": "Logic input that sets the microstep resolution together with MS2 and MS3 per Table 1; it has an internal 100 kΩ pull-down and changes take effect at the next STEP rising edge."
      },
      {
        "number": "9",
        "name": "MS2",
        "type": "input",
        "description": "Logic input that sets the microstep resolution together with MS1 and MS3 per Table 1; it has an internal 100 kΩ pull-down and changes take effect at the next STEP rising edge."
      },
      {
        "number": "10",
        "name": "RESET",
        "type": "input",
        "description": "Logic input that sets the translator to the Home state and turns off all FET outputs when low; STEP inputs are ignored until RESET is high."
      },
      {
        "number": "11",
        "name": "ROSC",
        "type": "passive",
        "description": "Timing set pin: connecting to GND selects APFD with a 16 µs off-time, a resistor to GND sets off-time to ROSC/825 µs, and a pull-up above 3 V selects mixed decay with a 30 µs off-time."
      },
      {
        "number": "12",
        "name": "SLEEP",
        "type": "input",
        "description": "Logic input where a logic low puts the device into Sleep mode (current below 10 µA), and 1 ms must elapse after leaving Sleep before a STEP command."
      },
      {
        "number": "13",
        "name": "MS3",
        "type": "input",
        "description": "Logic input that sets the microstep resolution together with MS1 and MS2 per Table 1; it has an internal 100 kΩ pull-down and changes take effect at the next STEP rising edge."
      },
      {
        "number": "14",
        "name": "STEP",
        "type": "input",
        "description": "Logic input where each low-to-high transition advances the motor one microstep, with minimum HIGH and LOW pulse widths of 1 µs."
      },
      {
        "number": "15",
        "name": "REF",
        "type": "input",
        "description": "Gm reference voltage input with a 0 to 4 V range that sets the maximum current ITripMAX = VREF/(8 × RS)."
      },
      {
        "number": "16",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; the GND pins must be tied together externally by connecting to the PAD ground plane under the device."
      },
      {
        "number": "17",
        "name": "DIR",
        "type": "input",
        "description": "Logic input that sets the direction of motor rotation; changes take effect at the next STEP input rising edge."
      },
      {
        "number": "18",
        "name": "OUT1B",
        "type": "output",
        "description": "DMOS full-bridge 1 output B; the output drive capacity of the device is up to 40 V and ±2 A."
      },
      {
        "number": "19",
        "name": "VBB1",
        "type": "power_in",
        "description": "Load supply with an operating range of 8 to 40 V."
      },
      {
        "number": "20",
        "name": "SENSE1",
        "type": "passive",
        "description": "Sense resistor terminal for bridge 1; the SENSE1 pin must not exceed its rated -0.5 to 0.5 V."
      },
      {
        "number": "21",
        "name": "OUT1A",
        "type": "output",
        "description": "DMOS full-bridge 1 output A; the output drive capacity of the device is up to 40 V and ±2 A."
      },
      {
        "number": "22",
        "name": "OUT2A",
        "type": "output",
        "description": "DMOS full-bridge 2 output A; the output drive capacity of the device is up to 40 V and ±2 A."
      },
      {
        "number": "23",
        "name": "SENSE2",
        "type": "passive",
        "description": "Sense resistor terminal for bridge 2; the SENSE2 pin must not exceed its rated -0.5 to 0.5 V."
      },
      {
        "number": "24",
        "name": "VBB2",
        "type": "power_in",
        "description": "Load supply with an operating range of 8 to 40 V."
      },
      {
        "number": "25",
        "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 pad is not given a numeric or ball number in the datasheet terminal list; it is included; The datasheet describes nFAULT as an open-drain fault output; it is typed output here because the ER; The datasheet does not assign electrical types to these pins; passive was chosen based on their desc"
        ],
        "pages_sent": 28,
        "cost_usd": 0.1083,
        "at": "2026-10-20T23:59:39"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588953508599517184",
        "pages": 28,
        "sha256": "e934c6cbe1bf6530",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "a5984gestr-t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "096fc110543e6d324c5120c2d38e3dca87a389da9b6fac234f1fe40856295ef4",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "a5984gestr-t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "fdc737610bf0ed4bea7fa8e4773660c90c10e6e4e2bb21e26cf6905b0b986833",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}