A5976GLPTR-T

{
  "slug": "a5976glptr-t",
  "version": "0.1.0",
  "type": "component",
  "description": "Allegro MicroSystems LLC Global Sourcing Parts, TSSOP-28-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "global sourcing parts",
    "a5976glptr-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "a5976glptr-t.kicad_sym",
    "a5976glptr-t.kicad_mod",
    "a5976glptr-t.glb",
    "a5976glptr-t.step",
    "a5976glptr-t.lbr",
    "docs/hero.png",
    "docs/a5976glptr-t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "a5976glptr-t-hero.glb",
    "a5976glptr-t-hero.overlay.json"
  ],
  "component": {
    "mpn": "A5976GLPTR-T",
    "manufacturer": "Allegro MicroSystems LLC",
    "package": "TSSOP-28-EP",
    "pin_count": 29,
    "category": "Global Sourcing Parts",
    "subcategory": "Global Sourcing Parts",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881538008698880",
    "parts": {
      "symbol": "a5976glptr-t.kicad_sym",
      "footprint": "a5976glptr-t.kicad_mod",
      "model_3d": "a5976glptr-t-hero.glb",
      "model_3d_plain": "a5976glptr-t.glb",
      "model_3d_step": "a5976glptr-t-etched.step",
      "model_3d_step_plain": "a5976glptr-t.step",
      "lbr": "a5976glptr-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C163304",
      "mouser": "250-A5976GLPTR-T"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T23:59:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "deferred",
        "error": "shared DigiKey quota guard: 514 calls left today"
      },
      "mouser": {
        "pn": "250-A5976GLPTR-T",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SENSE1",
        "type": "passive",
        "description": "Current-sense resistor connection for bridge 1, where the DC SENSE voltage must not exceed 0.5 V."
      },
      {
        "number": "2",
        "name": "FAULTn",
        "type": "output",
        "description": "Open-drain fault output that is pulled low when an overcurrent condition exists, latched until RESETn or a VBB power cycle."
      },
      {
        "number": "3",
        "name": "DIR",
        "type": "input",
        "description": "Logic input whose state sets the direction of motor rotation."
      },
      {
        "number": "4",
        "name": "OUT1A",
        "type": "output",
        "description": "Output A of DMOS full-bridge 1, driving the bipolar stepper motor winding."
      },
      {
        "number": "5",
        "name": "PFD",
        "type": "input",
        "description": "Analog input selecting decay mode: above 0.6×VDD selects slow decay, below 0.21×VDD selects fast decay, and it should be decoupled with a 0.1 µF capacitor."
      },
      {
        "number": "6",
        "name": "RC1",
        "type": "input",
        "description": "Analog fixed off-time timing terminal for bridge 1, with off-time set by external RT and CT to ground (RT 12 kΩ to 100 kΩ, CT 470 pF to 1500 pF)."
      },
      {
        "number": "7",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground, which must be connected externally together with PGND and the thermal pad."
      },
      {
        "number": "8",
        "name": "REF",
        "type": "input",
        "description": "Gm reference voltage input that sets the current limit; VREF should not exceed 4 V except in full-step mode, where it can go up to VDD."
      },
      {
        "number": "9",
        "name": "RC2",
        "type": "input",
        "description": "Analog fixed off-time timing terminal for bridge 2, with off-time set by external RT and CT to ground (RT 12 kΩ to 100 kΩ, CT 470 pF to 1500 pF)."
      },
      {
        "number": "10",
        "name": "VDD",
        "type": "power_in",
        "description": "Logic supply voltage, operating range 3 to 5.5 V."
      },
      {
        "number": "11",
        "name": "OUT2A",
        "type": "output",
        "description": "Output A of DMOS full-bridge 2, driving the bipolar stepper motor winding."
      },
      {
        "number": "12",
        "name": "MS2",
        "type": "input",
        "description": "Logic input that selects microstep resolution together with MS1 (L,L full step; L,H half step; H,L quarter step; H,H sixteenth step), latched on the STEP command."
      },
      {
        "number": "13",
        "name": "MS1",
        "type": "input",
        "description": "Logic input that selects microstep resolution together with MS2, with changes taking effect only at the next STEP command."
      },
      {
        "number": "14",
        "name": "SENSE2",
        "type": "passive",
        "description": "Current-sense resistor connection for bridge 2, where the DC SENSE voltage must not exceed 0.5 V."
      },
      {
        "number": "15",
        "name": "VBB2",
        "type": "power_in",
        "description": "Load supply for bridge 2, operating range 8 to 40 V."
      },
      {
        "number": "16",
        "name": "DECAY",
        "type": "input",
        "description": "Logic input that, when high, forces slow decay on steps where DAC levels increase or stay equal and otherwise uses the PFD setting; when low, decay is always set by PFD."
      },
      {
        "number": "17",
        "name": "RESETn",
        "type": "input",
        "description": "Active-low logic input that sets the translator to the home state and turns off all DMOS outputs, with STEP inputs ignored until it returns high."
      },
      {
        "number": "18",
        "name": "OUT2B",
        "type": "output",
        "description": "Output B of DMOS full-bridge 2, driving the bipolar stepper motor winding."
      },
      {
        "number": "19",
        "name": "STEP",
        "type": "input",
        "description": "Logic input where a low-to-high transition advances the motor one microstep, requiring a minimum high and low pulse width of 1 µs."
      },
      {
        "number": "20",
        "name": "VREG",
        "type": "power_out",
        "description": "Internally generated regulator voltage for the sink-side DMOS gates, to be decoupled with a 0.22 µF capacitor to ground."
      },
      {
        "number": "21",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground, which must be connected externally together with GND and the thermal pad."
      },
      {
        "number": "22",
        "name": "VCP",
        "type": "power_out",
        "description": "Charge-pump reservoir capacitor terminal, requiring a 0.22 µF ceramic capacitor between VCP and VBB."
      },
      {
        "number": "23",
        "name": "CP1",
        "type": "passive",
        "description": "Charge-pump capacitor terminal, requiring a 0.22 µF ceramic capacitor between CP1 and CP2."
      },
      {
        "number": "24",
        "name": "CP2",
        "type": "passive",
        "description": "Charge-pump capacitor terminal, requiring a 0.22 µF ceramic capacitor between CP1 and CP2."
      },
      {
        "number": "25",
        "name": "OUT1B",
        "type": "output",
        "description": "Output B of DMOS full-bridge 1, driving the bipolar stepper motor winding."
      },
      {
        "number": "26",
        "name": "ENABLEn",
        "type": "input",
        "description": "Active-low logic input that enables all DMOS outputs, with outputs disabled when logic-high."
      },
      {
        "number": "27",
        "name": "SLEEPn",
        "type": "input",
        "description": "Active-low logic input for sleep mode, where a logic-high allows normal operation and 1 ms is required after wakeup before a STEP command."
      },
      {
        "number": "28",
        "name": "VBB1",
        "type": "power_in",
        "description": "Load supply for bridge 1, operating range 8 to 40 V."
      },
      {
        "number": "29",
        "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 datasheet's terminal list gives the exposed thermal pad no pin number (printed as '–' / 'PAD'), ; FAULTn is described as an open-drain output; it is mapped to KiCad 'output' since no open-drain clas; SENSE1/SENSE2 are sense-resistor connections with no stated electrical type; mapped to 'passive' as ",
          "exposed pad 29 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint",
          "12/29 pins cited to the wrong page (name found elsewhere): ['1:SENSE1@p7', '6:RC1@p7', '9:RC2@p7', '14:SENSE2@p7']"
        ],
        "pages_sent": 16,
        "cost_usd": 0.0911,
        "at": "2026-10-09T23:56:52"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881538008698880",
        "pages": 16,
        "sha256": "9f6d952911c0119c",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 29,
        "described": 29,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "a5976glptr-t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.2,
          9.7,
          1.05
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ff242f1d3be9d09e7f929707a2c5b1ee974a4f882053b04bcdb1cd2cb21223ef",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "a5976glptr-t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.2,
          9.7,
          1.05
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "719afa097b743e03338ac66af7082c304095d14573df69403b20d7f901623d85",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}