LMK00338RTAT

{
  "slug": "lmk00338rtat",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Clock Buffers, Drivers, WQFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "rtc-clock chip",
    "lmk00338rtat",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lmk00338rtat.kicad_sym",
    "lmk00338rtat.kicad_mod",
    "lmk00338rtat.glb",
    "lmk00338rtat.step",
    "lmk00338rtat.lbr",
    "docs/hero.png",
    "docs/lmk00338rtat-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lmk00338rtat-hero.glb",
    "lmk00338rtat-hero.overlay.json"
  ],
  "component": {
    "mpn": "LMK00338RTAT",
    "manufacturer": "Texas Instruments",
    "package": "WQFN-40-EP(6x6)",
    "pin_count": 41,
    "category": "RTC/Clock Chip",
    "subcategory": "Clock Buffers, Drivers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lmk00338",
    "parts": {
      "symbol": "lmk00338rtat.kicad_sym",
      "footprint": "lmk00338rtat.kicad_mod",
      "model_3d": "lmk00338rtat-hero.glb",
      "model_3d_plain": "lmk00338rtat.glb",
      "model_3d_step": "lmk00338rtat-etched.step",
      "model_3d_step_plain": "lmk00338rtat.step",
      "lbr": "lmk00338rtat.lbr"
    },
    "distributor_links": {
      "lcsc": 2651411,
      "digikey": "296-47794-2-ND",
      "mouser": "595-LMK00338RTAT"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T23:57:05Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-47794-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-LMK00338RTAT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CLKoutA0",
        "type": "output",
        "description": "Differential clock output A0"
      },
      {
        "number": "2",
        "name": "CLKoutA0*",
        "type": "output",
        "description": "Differential clock output A0"
      },
      {
        "number": "3",
        "name": "VCCOA",
        "type": "power_in",
        "description": "Power supply for Bank A Output buffers operating from 3.3 V or 2.5 V"
      },
      {
        "number": "4",
        "name": "CLKoutA1",
        "type": "output",
        "description": "Differential clock output A1"
      },
      {
        "number": "5",
        "name": "CLKoutA1*",
        "type": "output",
        "description": "Differential clock output A1"
      },
      {
        "number": "6",
        "name": "VCCOA",
        "type": "power_in",
        "description": "Power supply for Bank A Output buffers operating from 3.3 V or 2.5 V"
      },
      {
        "number": "7",
        "name": "CLKoutA2",
        "type": "output",
        "description": "Differential clock output A2"
      },
      {
        "number": "8",
        "name": "CLKoutA2*",
        "type": "output",
        "description": "Differential clock output A2"
      },
      {
        "number": "9",
        "name": "CLKoutA3",
        "type": "output",
        "description": "Differential clock output A3"
      },
      {
        "number": "10",
        "name": "CLKoutA3*",
        "type": "output",
        "description": "Differential clock output A3"
      },
      {
        "number": "11",
        "name": "CLKoutA_EN",
        "type": "input",
        "description": "Bank A low active output buffer enable"
      },
      {
        "number": "12",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply for Core and Input buffer blocks operating at 3.3 V"
      },
      {
        "number": "13",
        "name": "OSCin",
        "type": "input",
        "description": "Input for crystal accepting 10 MHz to 40 MHz crystal or single-ended clock"
      },
      {
        "number": "14",
        "name": "OSCout",
        "type": "output",
        "description": "Output for crystal, leave floating if OSCin is driven by single-ended clock"
      },
      {
        "number": "15",
        "name": "CLKin_SEL0",
        "type": "input",
        "description": "Clock input selection pin"
      },
      {
        "number": "16",
        "name": "CLKin0",
        "type": "input",
        "description": "Universal clock input 0 (differential or single-ended) up to 400 MHz"
      },
      {
        "number": "17",
        "name": "CLKin0*",
        "type": "input",
        "description": "Universal clock input 0 (differential or single-ended) up to 400 MHz"
      },
      {
        "number": "18",
        "name": "CLKin_SEL1",
        "type": "input",
        "description": "Clock input selection pin"
      },
      {
        "number": "19",
        "name": "CLKoutB_EN",
        "type": "input",
        "description": "Bank B low active output buffer enable"
      },
      {
        "number": "20",
        "name": "GND",
        "type": "power_in",
        "description": "Ground"
      },
      {
        "number": "21",
        "name": "CLKoutB3*",
        "type": "output",
        "description": "Differential clock output B3"
      },
      {
        "number": "22",
        "name": "CLKoutB3",
        "type": "output",
        "description": "Differential clock output B3"
      },
      {
        "number": "23",
        "name": "CLKoutB2*",
        "type": "output",
        "description": "Differential clock output B2"
      },
      {
        "number": "24",
        "name": "CLKoutB2",
        "type": "output",
        "description": "Differential clock output B2"
      },
      {
        "number": "25",
        "name": "VCCOB",
        "type": "power_in",
        "description": "Power supply for Bank B Output buffers operating from 3.3 V or 2.5 V"
      },
      {
        "number": "26",
        "name": "CLKoutB1*",
        "type": "output",
        "description": "Differential clock output B1"
      },
      {
        "number": "27",
        "name": "CLKoutB1",
        "type": "output",
        "description": "Differential clock output B1"
      },
      {
        "number": "28",
        "name": "VCCOB",
        "type": "power_in",
        "description": "Power supply for Bank B Output buffers operating from 3.3 V or 2.5 V"
      },
      {
        "number": "29",
        "name": "CLKoutB0*",
        "type": "output",
        "description": "Differential clock output B0"
      },
      {
        "number": "30",
        "name": "CLKoutB0",
        "type": "output",
        "description": "Differential clock output B0"
      },
      {
        "number": "31",
        "name": "GND",
        "type": "power_in",
        "description": "Ground"
      },
      {
        "number": "32",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply for Core and Input buffer blocks operating at 3.3 V"
      },
      {
        "number": "33",
        "name": "CLKin1*",
        "type": "input",
        "description": "Universal clock input 1 (differential or single-ended) up to 400 MHz"
      },
      {
        "number": "34",
        "name": "CLKin1",
        "type": "input",
        "description": "Universal clock input 1 (differential or single-ended) up to 400 MHz"
      },
      {
        "number": "35",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply for Core and Input buffer blocks operating at 3.3 V"
      },
      {
        "number": "36",
        "name": "REFout",
        "type": "output",
        "description": "LVCMOS reference output"
      },
      {
        "number": "37",
        "name": "VCCOC",
        "type": "power_in",
        "description": "Power supply for REFout Output buffer operating from 3.3 V or 2.5 V"
      },
      {
        "number": "38",
        "name": "REFout_EN",
        "type": "input",
        "description": "REFout enable input with internal synchronization to selected clock input"
      },
      {
        "number": "39",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply for Core and Input buffer blocks operating at 3.3 V"
      },
      {
        "number": "40",
        "name": "GND",
        "type": "power_in",
        "description": "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-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "exposed pad 41 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 8,
        "cost_usd": 0.1558,
        "at": "2026-10-05T23:56:48"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lmk00338",
        "pages": 34,
        "sha256": "89b6e86d2a67b80d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 41,
        "described": 41,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    }
  }
}