LMX2572LPRHAT

{
  "slug": "lmx2572lprhat",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Clock Generators / Frequency Synthesizers / PLL, HVQFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "rtc-clock chip",
    "lmx2572lprhat",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "lmx2572lprhat.kicad_sym",
    "lmx2572lprhat.kicad_mod",
    "lmx2572lprhat.glb",
    "lmx2572lprhat.step",
    "lmx2572lprhat.lbr",
    "docs/hero.png",
    "docs/lmx2572lprhat-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lmx2572lprhat-hero.glb",
    "lmx2572lprhat-hero.overlay.json"
  ],
  "component": {
    "mpn": "LMX2572LPRHAT",
    "manufacturer": "Texas Instruments",
    "package": "HVQFN-40-EP(6x6)",
    "pin_count": 41,
    "category": "RTC/Clock Chip",
    "subcategory": "Clock Generators / Frequency Synthesizers / PLL",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lmx2572lp",
    "parts": {
      "symbol": "lmx2572lprhat.kicad_sym",
      "footprint": "lmx2572lprhat.kicad_mod",
      "model_3d": "lmx2572lprhat-hero.glb",
      "model_3d_plain": "lmx2572lprhat.glb",
      "model_3d_step": "lmx2572lprhat-etched.step",
      "model_3d_step_plain": "lmx2572lprhat.step",
      "lbr": "lmx2572lprhat.lbr"
    },
    "distributor_links": {
      "lcsc": "C2662636",
      "digikey": "296-51375-2-ND",
      "mouser": "595-LMX2572LPRHAT"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T20:06:49Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-51375-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-LMX2572LPRHAT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CE",
        "type": "input",
        "description": "Chip enable: high-impedance CMOS input for 1.8-V to 3.3-V logic; active HIGH powers on the device."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "VCO ground."
      },
      {
        "number": "3",
        "name": "VbiasVCO",
        "type": "passive",
        "description": "Bypass VCO bias; connect a 470-nF (X7R) decoupling capacitor to VCO ground as close to this pin as possible."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "VCO ground."
      },
      {
        "number": "5",
        "name": "SYNC",
        "type": "input",
        "description": "Phase synchronization trigger; configurable to accept CMOS input (1.8-V to 3.3-V logic) or differential input."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "7",
        "name": "VccDIG",
        "type": "power_in",
        "description": "Digital power supply; connect a 0.1-µF decoupling capacitor to digital ground."
      },
      {
        "number": "8",
        "name": "OSCinP",
        "type": "input",
        "description": "Reference input clock (+); high-impedance self-biasing pin that requires AC-coupling."
      },
      {
        "number": "9",
        "name": "OSCinM",
        "type": "input",
        "description": "Reference input clock (-); high-impedance self-biasing pin that requires AC-coupling."
      },
      {
        "number": "10",
        "name": "VregIN",
        "type": "passive",
        "description": "Input reference path regulator output; connect a 1-µF decoupling capacitor to RF ground as close to this pin as possible."
      },
      {
        "number": "11",
        "name": "VccCP",
        "type": "power_in",
        "description": "Supply for charge pump; connect a 0.1-µF decoupling capacitor to charge pump ground."
      },
      {
        "number": "12",
        "name": "CPout",
        "type": "output",
        "description": "Charge pump output; place C1 of the loop filter close to this pin."
      },
      {
        "number": "13",
        "name": "GND",
        "type": "power_in",
        "description": "Charge pump ground."
      },
      {
        "number": "14",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "15",
        "name": "VccMASH",
        "type": "power_in",
        "description": "Digital power supply; connect a 1-µF decoupling capacitor to digital ground."
      },
      {
        "number": "16",
        "name": "SCK",
        "type": "input",
        "description": "SPI clock: high-impedance CMOS input for 1.8-V to 3.3-V logic."
      },
      {
        "number": "17",
        "name": "SDI",
        "type": "input",
        "description": "SPI data: high-impedance CMOS input for 1.8-V to 3.3-V logic."
      },
      {
        "number": "18",
        "name": "RFoutBM",
        "type": "output",
        "description": "Differential output B (-): low-impedance output that requires AC-coupling."
      },
      {
        "number": "19",
        "name": "RFoutBP",
        "type": "output",
        "description": "Differential output B (+): low-impedance output that requires AC-coupling."
      },
      {
        "number": "20",
        "name": "MUXout",
        "type": "output",
        "description": "Multiplexed output configurable between lock detect and register readback."
      },
      {
        "number": "21",
        "name": "VccBUF",
        "type": "power_in",
        "description": "Supply for output buffers; connect a 0.1-µF decoupling capacitor to RF ground."
      },
      {
        "number": "22",
        "name": "RFoutAM",
        "type": "output",
        "description": "Differential output A (-): low-impedance output that requires AC-coupling."
      },
      {
        "number": "23",
        "name": "RFoutAP",
        "type": "output",
        "description": "Differential output A (+): low-impedance output that requires AC-coupling."
      },
      {
        "number": "24",
        "name": "CSB",
        "type": "input",
        "description": "SPI latch: high-impedance CMOS input for 1.8-V to 3.3-V logic."
      },
      {
        "number": "25",
        "name": "GND",
        "type": "power_in",
        "description": "VCO ground."
      },
      {
        "number": "26",
        "name": "VccVCO2",
        "type": "power_in",
        "description": "Supply for VCO; connect a 1-µF decoupling capacitor to VCO ground."
      },
      {
        "number": "27",
        "name": "VbiasVCO2",
        "type": "passive",
        "description": "Bypass VCO bias; connect a 100-nF (X7R) decoupling capacitor to VCO ground."
      },
      {
        "number": "28",
        "name": "SysRefReq",
        "type": "input",
        "description": "FSK I2S frame sync input: high-impedance CMOS input for 1.8-V to 3.3-V logic."
      },
      {
        "number": "29",
        "name": "VrefVCO2",
        "type": "passive",
        "description": "Bypass VCO supply reference; connect a 10-µF decoupling capacitor to VCO ground."
      },
      {
        "number": "30",
        "name": "RampClk",
        "type": "input",
        "description": "Ramp trigger in automatic ramping mode or ramp clock in manual ramping mode; can also serve as FSK I2S clock input; high-impedance CMOS input for 1.8-V to 3.3-V logic."
      },
      {
        "number": "31",
        "name": "GND",
        "type": "power_in",
        "description": "VCO ground."
      },
      {
        "number": "32",
        "name": "RampDir",
        "type": "input",
        "description": "Ramp trigger in automatic ramping mode or ramp segment selection in manual ramping mode; can also serve as FSK I2S data input; high-impedance CMOS input for 1.8-V to 3.3-V logic."
      },
      {
        "number": "33",
        "name": "VbiasVARAC",
        "type": "passive",
        "description": "Bypass VCO varactor bias; connect a 10-µF decoupling capacitor to VCO ground."
      },
      {
        "number": "34",
        "name": "GND",
        "type": "power_in",
        "description": "VCO ground."
      },
      {
        "number": "35",
        "name": "Vtune",
        "type": "input",
        "description": "VCO tuning voltage input; connect a 1.5-nF or larger capacitor to VCO ground (see External Loop Filter)."
      },
      {
        "number": "36",
        "name": "VrefVCO",
        "type": "passive",
        "description": "Bypass VCO supply reference; connect a 10-µF decoupling capacitor to VCO ground."
      },
      {
        "number": "37",
        "name": "VccVCO",
        "type": "power_in",
        "description": "Supply for VCO; connect a 1-µF decoupling capacitor to VCO ground."
      },
      {
        "number": "38",
        "name": "VregVCO",
        "type": "passive",
        "description": "Bypass VCO regulator node; connect a 10-nF decoupling capacitor to VCO ground."
      },
      {
        "number": "39",
        "name": "GND",
        "type": "power_in",
        "description": "VCO ground."
      },
      {
        "number": "40",
        "name": "GND",
        "type": "power_in",
        "description": "Digital ground."
      },
      {
        "number": "41",
        "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: Package name mismatch: the requested hint is HVQFN-40-EP(6x6), while the datasheet and ordering adde; The exposed die pad (DAP) has no printed pin number in the datasheet (listed as '—'). It is included; Pin types for bypass/decoupling and regulator-node pins (VbiasVCO, VbiasVCO2, VbiasVARAC, VrefVCO, V",
          "exposed pad 41 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 11,
        "cost_usd": 0.1036,
        "at": "2026-10-08T20:05:57"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lmx2572lp",
        "pages": 87,
        "sha256": "69f0bb4362d891e6",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 41,
        "described": 41,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "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": "fd098c9be49cbb87441f4e4e025c27ec4faf99e55b57717c22b6e489282c72c2",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
        "file": "lmx2572lprhat-etched.step",
        "role": "eda",
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
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        "sha256": "7dbdd7b8394f3006118cf265792afa26a64bf3b203df714caedb35a370a5f0d2",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}