L9177ATR

{
  "slug": "l9177atr",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics Power Management - Specialized, TQFP-64-EP(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "l9177atr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "l9177atr.kicad_sym",
    "l9177atr.kicad_mod",
    "l9177atr.glb",
    "l9177atr.step",
    "l9177atr.lbr",
    "docs/hero.png",
    "docs/l9177atr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
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    "l9177atr-etched.glb"
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  "component": {
    "mpn": "L9177ATR",
    "manufacturer": "STMicroelectronics",
    "package": "TQFP-64-EP(10x10)",
    "pin_count": 65,
    "category": "Power Management (PMIC)",
    "subcategory": "Power Management - Specialized",
    "datasheet": "https://www.st.com/resource/en/datasheet/l9177atr.pdf",
    "parts": {
      "symbol": "l9177atr.kicad_sym",
      "footprint": "l9177atr.kicad_mod",
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      "lbr": "l9177atr.lbr"
    },
    "distributor_links": {
      "lcsc": "C472536",
      "digikey": "497-17754-2-ND",
      "mouser": "511-L9177ATR"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T16:21:39Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-17754-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-L9177ATR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DIR",
        "type": "input",
        "description": "Logic input that sets the stepper motor direction."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "3",
        "name": "VDD_TRK",
        "type": "power_out",
        "description": "Output of the 5 V tracking voltage regulator, rated 40 mA with short to battery protection."
      },
      {
        "number": "4",
        "name": "REXT",
        "type": "input",
        "description": "External resistor connection for the precision current reference (10 kOhm 1% pull-up in the application circuit)."
      },
      {
        "number": "5",
        "name": "HS_OUT",
        "type": "power_out",
        "description": "High side switch output, protected with 100 mA minimum current limitation threshold."
      },
      {
        "number": "6",
        "name": "VRIN+",
        "type": "input",
        "description": "Positive differential input of the variable reluctance sensor (VRS) interface."
      },
      {
        "number": "7",
        "name": "VRIN-",
        "type": "input",
        "description": "Negative differential input of the variable reluctance sensor (VRS) interface."
      },
      {
        "number": "8",
        "name": "VROUT",
        "type": "output",
        "description": "Output of the variable reluctance sensor (VRS) interface."
      },
      {
        "number": "9",
        "name": "O2H",
        "type": "power_out",
        "description": "O2 sensor heater output, clamped to 45 V with minimum guaranteed output current 3 A."
      },
      {
        "number": "10",
        "name": "TACH",
        "type": "power_out",
        "description": "Tachometer driver output, minimum guaranteed output current 25 mA."
      },
      {
        "number": "11",
        "name": "ILS_TACH",
        "type": "input",
        "description": "Input of the tachometer driver."
      },
      {
        "number": "12",
        "name": "GND_O2H",
        "type": "power_in",
        "description": "Ground for the O2 sensor heater driver."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "14",
        "name": "INO2H",
        "type": "input",
        "description": "Input command for the O2 sensor heater driver."
      },
      {
        "number": "15",
        "name": "RESET",
        "type": "output",
        "description": "Reset signal output to the microcontroller."
      },
      {
        "number": "16",
        "name": "IN_REL2",
        "type": "input",
        "description": "Parallel control input for relay driver 2."
      },
      {
        "number": "17",
        "name": "IN_REL1",
        "type": "input",
        "description": "Parallel control input for relay driver 1."
      },
      {
        "number": "18",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "19",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "20",
        "name": "REL2",
        "type": "power_out",
        "description": "Relay 2 driver output, clamped to 45 V with minimum guaranteed output current 1 A."
      },
      {
        "number": "21",
        "name": "GND_P_1",
        "type": "power_in",
        "description": "Power ground for relay drivers 1 and 2."
      },
      {
        "number": "22",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "23",
        "name": "REL1",
        "type": "power_out",
        "description": "Relay 1 driver output, clamped to 45 V with minimum guaranteed output current 1 A."
      },
      {
        "number": "24",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "25",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "26",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "27",
        "name": "REL3",
        "type": "power_out",
        "description": "Relay 3 driver output, clamped to 45 V with minimum guaranteed output current 1 A."
      },
      {
        "number": "28",
        "name": "GND_P_2",
        "type": "power_in",
        "description": "Power ground for the current limited low side driver."
      },
      {
        "number": "29",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "30",
        "name": "L",
        "type": "power_out",
        "description": "Current limited low side driver output, clamped to 45 V with minimum guaranteed output current 1 A (2 A during in-rush)."
      },
      {
        "number": "31",
        "name": "L",
        "type": "power_out",
        "description": "Current limited low side driver output, clamped to 45 V with minimum guaranteed output current 1 A (2 A during in-rush)."
      },
      {
        "number": "32",
        "name": "SO",
        "type": "output",
        "description": "SPI data output."
      },
      {
        "number": "33",
        "name": "SI",
        "type": "input",
        "description": "SPI data input."
      },
      {
        "number": "34",
        "name": "SCK",
        "type": "input",
        "description": "SPI serial clock input."
      },
      {
        "number": "35",
        "name": "CS",
        "type": "input",
        "description": "SPI chip select input."
      },
      {
        "number": "36",
        "name": "KEY",
        "type": "input",
        "description": "Key signal input."
      },
      {
        "number": "37",
        "name": "INJ1",
        "type": "power_out",
        "description": "Injector 1 driver power output, clamped to 60 V with minimum overcurrent at 2.8 A."
      },
      {
        "number": "38",
        "name": "IN1",
        "type": "input",
        "description": "Injector 1 driver input command."
      },
      {
        "number": "39",
        "name": "GND_INJ1",
        "type": "power_in",
        "description": "Ground for injector 1 driver."
      },
      {
        "number": "40",
        "name": "GND_INJ2",
        "type": "power_in",
        "description": "Ground for injector 2 driver."
      },
      {
        "number": "41",
        "name": "IN2",
        "type": "input",
        "description": "Injector 2 driver input command."
      },
      {
        "number": "42",
        "name": "INJ2",
        "type": "power_out",
        "description": "Injector 2 driver power output, clamped to 60 V with minimum overcurrent at 2.8 A."
      },
      {
        "number": "43",
        "name": "KL_TX",
        "type": "input",
        "description": "K-Line transmit digital input."
      },
      {
        "number": "44",
        "name": "KL_RX",
        "type": "output",
        "description": "K-Line receive digital output."
      },
      {
        "number": "45",
        "name": "KL_LINE",
        "type": "bidirectional",
        "description": "K-Line bus input/output (standard ISO-9141 compatible)."
      },
      {
        "number": "46",
        "name": "VDD",
        "type": "power_out",
        "description": "Output of the 5 V main voltage regulator, rated 300 mA."
      },
      {
        "number": "47",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "48",
        "name": "PWM",
        "type": "input",
        "description": "Logic input that sets the stepper motor speed."
      },
      {
        "number": "49",
        "name": "VDD_SB",
        "type": "power_out",
        "description": "Output of the 5 V standby voltage regulator, rated 2.5 mA."
      },
      {
        "number": "50",
        "name": "VB",
        "type": "power_in",
        "description": "Battery line supplying bridge 2, rated 6 V to 18 V operating range."
      },
      {
        "number": "51",
        "name": "OUTD",
        "type": "power_out",
        "description": "Stepper motor bridge 2 output D."
      },
      {
        "number": "52",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "53",
        "name": "OUTC",
        "type": "power_out",
        "description": "Stepper motor bridge 2 output C."
      },
      {
        "number": "54",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "55",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "56",
        "name": "GND",
        "type": "power_in",
        "description": "Analog and power ground."
      },
      {
        "number": "57",
        "name": "GND",
        "type": "power_in",
        "description": "Analog and power ground."
      },
      {
        "number": "58",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "59",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "60",
        "name": "OUTB",
        "type": "power_out",
        "description": "Stepper motor bridge 1 output B."
      },
      {
        "number": "61",
        "name": "OUTA",
        "type": "power_out",
        "description": "Stepper motor bridge 1 output A."
      },
      {
        "number": "62",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected."
      },
      {
        "number": "63",
        "name": "VB_1",
        "type": "power_in",
        "description": "Battery line supplying bridge 1, rated 6 V to 18 V operating range."
      },
      {
        "number": "64",
        "name": "EN",
        "type": "input",
        "description": "Logic input that enables the stepper motor driver."
      },
      {
        "number": "65",
        "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 exposed pad is listed in Table 1 as '-' with no numbered pin. It is recorded here as"
        ],
        "pages_sent": 17,
        "cost_usd": 0.037,
        "at": "2026-10-28T16:20:55"
      },
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/l9177atr.pdf",
        "pages": 53,
        "sha256": "c31d74b08aa6c4dc",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 65,
        "described": 65,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "role": "plain",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "61ecab0d2805ca665ea882fdeefc607305973ad2f37b10e7efa4453dc9b3ac9f",
        "checked": "2026-10-28",
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      },
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        "sha256": "1be7c2ce36e55a2623e0ae853a49de4aa9a2cf6835d5f955d93b92b0d3d241c1",
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      }
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  }
}