LMX2531LQ1742

{
  "slug": "lmx2531lq1742",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Clock Generators, PLLs, Frequency Synthesizers, WQFN-36(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "clock-timing",
    "lmx2531lq1742",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "lmx2531lq1742.kicad_sym",
    "lmx2531lq1742.kicad_mod",
    "lmx2531lq1742.glb",
    "lmx2531lq1742.step",
    "lmx2531lq1742.lbr",
    "docs/hero.png",
    "docs/lmx2531lq1742-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lmx2531lq1742-hero.glb",
    "lmx2531lq1742-hero.overlay.json"
  ],
  "component": {
    "mpn": "LMX2531LQ1742",
    "manufacturer": "Texas Instruments",
    "package": "WQFN-36(6x6)",
    "pin_count": 37,
    "category": "Clock/Timing",
    "subcategory": "Clock Generators, PLLs, Frequency Synthesizers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lmx2531",
    "parts": {
      "symbol": "lmx2531lq1742.kicad_sym",
      "footprint": "lmx2531lq1742.kicad_mod",
      "model_3d": "lmx2531lq1742-hero.glb",
      "model_3d_plain": "lmx2531lq1742.glb",
      "model_3d_step": "lmx2531lq1742-etched.step",
      "model_3d_step_plain": "lmx2531lq1742.step",
      "lbr": "lmx2531lq1742.lbr"
    },
    "distributor_links": {
      "lcsc": "C2870733"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T21:13:47Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VccDIG",
        "type": "power_in",
        "description": "Power supply for the digital LDO circuitry, input range 2.8 V to 3.2 V, with bypass capacitors placed as close as possible to the pin."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "4",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "6",
        "name": "VregBUF",
        "type": "power_out",
        "description": "Internally regulated voltage for the VCO buffer circuitry; connect to ground with a capacitor."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "8",
        "name": "DATA",
        "type": "input",
        "description": "MICROWIRE serial data input (high-impedance CMOS) that must not exceed 2.75 V; data is clocked in MSB first and the last bits form the control or register select bits."
      },
      {
        "number": "9",
        "name": "CLK",
        "type": "input",
        "description": "MICROWIRE clock input (high-impedance CMOS) that must not exceed 2.75 V; data is clocked into the shift register on the rising edge."
      },
      {
        "number": "10",
        "name": "LE",
        "type": "input",
        "description": "MICROWIRE latch enable input (high-impedance CMOS) that must not exceed 2.75 V; data in the shift register is loaded into the selected latch when LE goes high."
      },
      {
        "number": "11",
        "name": "CE",
        "type": "input",
        "description": "Chip enable input (high-impedance CMOS) that must not exceed 2.75 V; bringing CE high powers up the device."
      },
      {
        "number": "12",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "13",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; do NOT ground this pin or the pad above it."
      },
      {
        "number": "15",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; do NOT ground this pin or the pad above it."
      },
      {
        "number": "16",
        "name": "VccVCO",
        "type": "power_in",
        "description": "Power supply for the VCO regulator circuitry, input range 2.8 V to 3.2 V, with bypass capacitors placed as close as possible to the pin."
      },
      {
        "number": "17",
        "name": "VregVCO",
        "type": "power_out",
        "description": "Internally regulated voltage for the VCO circuitry, not intended to drive an external load; connect to ground with a capacitor and some series resistance."
      },
      {
        "number": "18",
        "name": "VrefVCO",
        "type": "passive",
        "description": "Internal reference voltage for the VCO LDO, not intended to drive an external load; connect to ground with a capacitor."
      },
      {
        "number": "19",
        "name": "GND",
        "type": "power_in",
        "description": "Ground for the VCO circuitry."
      },
      {
        "number": "20",
        "name": "GND",
        "type": "power_in",
        "description": "Ground for the VCO output buffer circuitry."
      },
      {
        "number": "21",
        "name": "Fout",
        "type": "output",
        "description": "Buffered RF output for the VCO."
      },
      {
        "number": "22",
        "name": "VccBUF",
        "type": "power_in",
        "description": "Power supply for the VCO buffer circuitry, input range 2.8 V to 3.2 V, with bypass capacitors placed as close as possible to the pin."
      },
      {
        "number": "23",
        "name": "Vtune",
        "type": "input",
        "description": "VCO tuning voltage input, connected to CPout through an external passive loop filter."
      },
      {
        "number": "24",
        "name": "CPout",
        "type": "output",
        "description": "PLL charge pump output, connected to Vtune through an external passive loop filter."
      },
      {
        "number": "25",
        "name": "FLout",
        "type": "output",
        "description": "Open-drain NMOS output used for FastLock or as a general-purpose output; a pull-up resistor is required when used open-drain."
      },
      {
        "number": "26",
        "name": "VregPLL1",
        "type": "power_out",
        "description": "Internally regulated voltage for the PLL charge pump, not intended to drive an external load; connect to ground with a capacitor."
      },
      {
        "number": "27",
        "name": "VccPLL",
        "type": "power_in",
        "description": "Power supply for the PLL, input range 2.8 V to 3.2 V, with bypass capacitors placed as close as possible to the pin."
      },
      {
        "number": "28",
        "name": "VregPLL2",
        "type": "power_out",
        "description": "Internally regulated voltage for the RF digital circuitry, not intended to drive an external load; connect to ground with a capacitor."
      },
      {
        "number": "29",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "30",
        "name": "Ftest/LD",
        "type": "output",
        "description": "Multiplexed CMOS output used to monitor PLL lock condition or for diagnostics; its output levels are set by VOH and VOL, not by the supply voltage."
      },
      {
        "number": "31",
        "name": "OSCin",
        "type": "input",
        "description": "Oscillator input."
      },
      {
        "number": "32",
        "name": "OSCin*",
        "type": "input",
        "description": "Complementary oscillator input; when a single-ended source is used, a bypass capacitor should be placed as close as possible to this pin and connected to ground."
      },
      {
        "number": "33",
        "name": "Test",
        "type": "output",
        "description": "Test pin for test purposes that must be grounded for normal operation."
      },
      {
        "number": "34",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "35",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect."
      },
      {
        "number": "36",
        "name": "VregDIG",
        "type": "power_out",
        "description": "Internally regulated voltage for the digital LDO circuitry, connected to ground with a capacitor."
      },
      {
        "number": "37",
        "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 variant: LMX2531LQ1742/NOPB is listed in the orderable addendum (page 39) as WQFN (NJG), 36 ; Drawing ambiguity: the page 3 pin-diagram text for the D and A outlines differs in several positions; Types for pins 18 (VrefVCO) and 33 (Test) are not stated in the datasheet pin table (VrefVCO is '—';",
          "exposed pad 37 added from the footprint"
        ],
        "pages_sent": 16,
        "cost_usd": 0.1244,
        "at": "2026-10-08T21:12:58"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lmx2531",
        "pages": 47,
        "sha256": "640d071469707184",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 37,
        "described": 37,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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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": "6212c4fd2463ccb7c6ae2c35f5e24c80884153fcaeaf8e86549c0e49087bc8bb",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
        "file": "lmx2531lq1742-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "sha256": "2fc879e5c42ce143f5c339515b1961e822b9423aca0851621ea234ee31c1e1de",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}