LMK01801BISQE

{
  "schema_version": 1,
  "type": "component",
  "slug": "lmk01801bisqe",
  "title": "LMK01801BISQE",
  "brief": "Texas Instruments Clock Buffers, Drivers, VQFN-48-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "rtc-clock chip",
    "lmk01801bisqe",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LMK01801BISQE",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-48-EP(7x7)",
    "pin_count": 49,
    "category": "RTC/Clock Chip",
    "subcategory": "Clock Buffers, Drivers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lmk01801",
    "parts": {
      "symbol": "lmk01801bisqe.kicad_sym",
      "footprint": "lmk01801bisqe.kicad_mod",
      "model_3d": "lmk01801bisqe-hero.glb",
      "model_3d_plain": "lmk01801bisqe.glb",
      "model_3d_step": "lmk01801bisqe-etched.step",
      "model_3d_step_plain": "lmk01801bisqe.step",
      "lbr": "lmk01801bisqe.lbr"
    },
    "distributor_links": {
      "lcsc": "C2673010"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T18:44:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "LEuWire/CLKoutDIV_2",
        "type": "input",
        "description": "MICROWIRE Latch Enable input in MICROWIRE mode; in pin control mode it selects the clock divider 2 setting (CMOS / 3-State input)."
      },
      {
        "number": "2",
        "name": "CLKout0",
        "type": "output",
        "description": "Programmable clock output 0, selectable as LVDS or LVPECL, forming a differential pair with CLKout0*."
      },
      {
        "number": "3",
        "name": "CLKout0*",
        "type": "output",
        "description": "Complementary programmable clock output 0 (LVDS or LVPECL), forming a differential pair with CLKout0."
      },
      {
        "number": "4",
        "name": "CLKout1*",
        "type": "output",
        "description": "Complementary programmable clock output 1 (LVDS or LVPECL), forming a differential pair with CLKout1."
      },
      {
        "number": "5",
        "name": "CLKout1",
        "type": "output",
        "description": "Programmable clock output 1, selectable as LVDS or LVPECL, forming a differential pair with CLKout1*."
      },
      {
        "number": "6",
        "name": "Vcc1_CLKout0_1_2_3",
        "type": "power_in",
        "description": "Power supply for clock outputs 0, 1, 2 and 3; all Vcc pins must always be connected, with ferrite beads recommended on CLKout Vcc pins."
      },
      {
        "number": "7",
        "name": "CLKout2",
        "type": "output",
        "description": "Programmable clock output 2, selectable as LVDS or LVPECL, forming a differential pair with CLKout2*."
      },
      {
        "number": "8",
        "name": "CLKout2*",
        "type": "output",
        "description": "Complementary programmable clock output 2 (LVDS or LVPECL), forming a differential pair with CLKout2."
      },
      {
        "number": "9",
        "name": "CLKout3*",
        "type": "output",
        "description": "Complementary programmable clock output 3 (LVDS or LVPECL), forming a differential pair with CLKout3."
      },
      {
        "number": "10",
        "name": "CLKout3",
        "type": "output",
        "description": "Programmable clock output 3, selectable as LVDS or LVPECL, forming a differential pair with CLKout3*."
      },
      {
        "number": "11",
        "name": "Test/CLKoutTYPE_0",
        "type": "bidirectional",
        "description": "Reserved test pin; in pin control mode it selects the clock output type for CLKout0 to CLKout7 (CMOS / 3-State I/O)."
      },
      {
        "number": "12",
        "name": "SYNC0/CLKoutTYPE_1",
        "type": "input",
        "description": "SYNC0 input for clock output synchronization of bank A; in pin control mode it selects the clock output type 1 (CMOS / 3-State input)."
      },
      {
        "number": "13",
        "name": "CLKin0",
        "type": "input",
        "description": "Clock input 0 (bank A reference input), supporting clocking types including but not limited to LVDS, LVPECL and LVCMOS."
      },
      {
        "number": "14",
        "name": "CLKin0*",
        "type": "input",
        "description": "Complementary clock input 0, used with CLKin0 for differential clocking types including but not limited to LVDS, LVPECL and LVCMOS."
      },
      {
        "number": "15",
        "name": "Vcc2_CLKin0",
        "type": "power_in",
        "description": "Power supply for clock input 0; all Vcc pins must always be connected."
      },
      {
        "number": "16",
        "name": "CLKout4",
        "type": "output",
        "description": "Programmable clock output 4, selectable as LVDS, LVPECL or LVCMOS, forming a differential pair with CLKout4*."
      },
      {
        "number": "17",
        "name": "CLKout4*",
        "type": "output",
        "description": "Complementary programmable clock output 4 (LVDS, LVPECL or LVCMOS), forming a differential pair with CLKout4."
      },
      {
        "number": "18",
        "name": "CLKout5*",
        "type": "output",
        "description": "Complementary programmable clock output 5 (LVDS, LVPECL or LVCMOS), forming a differential pair with CLKout5."
      },
      {
        "number": "19",
        "name": "CLKout5",
        "type": "output",
        "description": "Programmable clock output 5, selectable as LVDS, LVPECL or LVCMOS, forming a differential pair with CLKout5*."
      },
      {
        "number": "20",
        "name": "Vcc3_CLKout4_5_6_7",
        "type": "power_in",
        "description": "Power supply for clock outputs 4, 5, 6 and 7; all Vcc pins must always be connected."
      },
      {
        "number": "21",
        "name": "CLKout6",
        "type": "output",
        "description": "Programmable clock output 6, selectable as LVDS, LVPECL or LVCMOS, forming a differential pair with CLKout6*."
      },
      {
        "number": "22",
        "name": "CLKout6*",
        "type": "output",
        "description": "Complementary programmable clock output 6 (LVDS, LVPECL or LVCMOS), forming a differential pair with CLKout6."
      },
      {
        "number": "23",
        "name": "CLKout7*",
        "type": "output",
        "description": "Complementary programmable clock output 7 (LVDS, LVPECL or LVCMOS), forming a differential pair with CLKout7."
      },
      {
        "number": "24",
        "name": "CLKout7",
        "type": "output",
        "description": "Programmable clock output 7, selectable as LVDS, LVPECL or LVCMOS, forming a differential pair with CLKout7*."
      },
      {
        "number": "25",
        "name": "Vcc4_Bias",
        "type": "power_in",
        "description": "Power supply for the Bias circuit; the Bias pin must be bypassed with a 1-µF capacitor to this pin for low-noise performance."
      },
      {
        "number": "26",
        "name": "Bias",
        "type": "passive",
        "description": "Bias bypass pin, to be bypassed with a 1-µF capacitor connected to Vcc4_Bias (Pin 25) for low noise performance."
      },
      {
        "number": "27",
        "name": "EN_PIN_CTRL",
        "type": "input",
        "description": "Selects MICROWIRE (SPI) or pin control mode (3-State input); floating selects SPI mode per the pin control mode tables."
      },
      {
        "number": "28",
        "name": "CLKout8",
        "type": "output",
        "description": "Programmable clock output 8, selectable as LVDS, LVPECL or LVCMOS, forming a differential pair with CLKout8*."
      },
      {
        "number": "29",
        "name": "CLKout8*",
        "type": "output",
        "description": "Complementary programmable clock output 8 (LVDS, LVPECL or LVCMOS), forming a differential pair with CLKout8."
      },
      {
        "number": "30",
        "name": "CLKout9*",
        "type": "output",
        "description": "Complementary programmable clock output 9 (LVDS, LVPECL or LVCMOS), forming a differential pair with CLKout9."
      },
      {
        "number": "31",
        "name": "CLKout9",
        "type": "output",
        "description": "Programmable clock output 9, selectable as LVDS, LVPECL or LVCMOS, forming a differential pair with CLKout9*."
      },
      {
        "number": "32",
        "name": "Vcc5_CLKout8_9_10_11",
        "type": "power_in",
        "description": "Power supply for clock outputs 8, 9, 10 and 11; all Vcc pins must always be connected."
      },
      {
        "number": "33",
        "name": "CLKout10",
        "type": "output",
        "description": "Programmable clock output 10, selectable as LVDS, LVPECL or LVCMOS, forming a differential pair with CLKout10*."
      },
      {
        "number": "34",
        "name": "CLKout10*",
        "type": "output",
        "description": "Complementary programmable clock output 10 (LVDS, LVPECL or LVCMOS), forming a differential pair with CLKout10."
      },
      {
        "number": "35",
        "name": "CLKout11*",
        "type": "output",
        "description": "Complementary programmable clock output 11 (LVDS, LVPECL or LVCMOS), forming a differential pair with CLKout11."
      },
      {
        "number": "36",
        "name": "CLKout11",
        "type": "output",
        "description": "Programmable clock output 11, selectable as LVDS, LVPECL or LVCMOS, forming a differential pair with CLKout11*."
      },
      {
        "number": "37",
        "name": "Vcc6_CLKin1",
        "type": "power_in",
        "description": "Power supply for clock input 1; all Vcc pins must always be connected."
      },
      {
        "number": "38",
        "name": "CLKin1",
        "type": "input",
        "description": "Clock input 1 (bank B reference input), supporting clocking types including but not limited to LVDS, LVPECL and LVCMOS."
      },
      {
        "number": "39",
        "name": "CLKin1*",
        "type": "input",
        "description": "Complementary clock input 1, used with CLKin1 for differential clocking types including but not limited to LVDS, LVPECL and LVCMOS."
      },
      {
        "number": "40",
        "name": "SYNC1/CLKoutTYPE_2",
        "type": "input",
        "description": "SYNC pin for CLKin1 and bank B; in pin control mode it selects the clock output type 2 (CMOS / 3-State input)."
      },
      {
        "number": "41",
        "name": "Vcc7_CLKout12_13",
        "type": "power_in",
        "description": "Power supply for clock outputs 12 and 13; all Vcc pins must always be connected."
      },
      {
        "number": "42",
        "name": "CLKout12",
        "type": "output",
        "description": "Programmable clock output 12, selectable as LVDS, LVPECL or LVCMOS, forming a differential pair with CLKout12*."
      },
      {
        "number": "43",
        "name": "CLKout12*",
        "type": "output",
        "description": "Complementary programmable clock output 12 (LVDS, LVPECL or LVCMOS), forming a differential pair with CLKout12."
      },
      {
        "number": "44",
        "name": "CLKout13*",
        "type": "output",
        "description": "Complementary programmable clock output 13 (LVDS, LVPECL or LVCMOS), forming a differential pair with CLKout13."
      },
      {
        "number": "45",
        "name": "CLKout13",
        "type": "output",
        "description": "Programmable clock output 13, selectable as LVDS, LVPECL or LVCMOS, forming a differential pair with CLKout13*."
      },
      {
        "number": "46",
        "name": "Vcc8_DIG",
        "type": "power_in",
        "description": "Power supply for the digital core; all Vcc pins must always be connected."
      },
      {
        "number": "47",
        "name": "DATAuWire/CLKoutDIV_0",
        "type": "input",
        "description": "MICROWIRE DATA pin in MICROWIRE mode; in pin control mode it selects clock divider 0 (CMOS / 3-State input)."
      },
      {
        "number": "48",
        "name": "CLKuWire/CLKoutDIV_1",
        "type": "input",
        "description": "MICROWIRE CLK pin in MICROWIRE mode; in pin control mode it selects clock divider 1 (CMOS / 3-State input)."
      },
      {
        "number": "49",
        "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 naming differs from the hint: the datasheet calls this package VQFN (48) 7.00 mm x 7.00 mm, ; Pin 11, 12, 27, 40, 47 and 48 have dual functions (MICROWIRE / SYNC / pin control mode). Which funct; Pin types for the CLKin and Bias pins are not given as KiCad classes in the datasheet. CLKin0/CLKin1",
          "exposed pad 49 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 13,
        "cost_usd": 0.1147,
        "at": "2026-10-08T18:43:20"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lmk01801",
        "pages": 59,
        "sha256": "5a3a7e0e51658147",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 49,
        "described": 49,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lmk01801bisqe.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          7,
          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "f2b38b0b4bf967c77e683e8d4599608b9f0503055ec535b93c4ebb5d0163e916",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lmk01801bisqe-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          7,
          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "491e18aae5240617603dbb0feedcffcc85d2b8158fe6f736fd960802040abbdb",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "VQFN-48-EP(7x7)",
      "Category": "RTC/Clock Chip",
      "Pins": "49"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lmk01801bisqe"
  ],
  "discovery_pitch": "LMK01801BISQE (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lmk01801bisqe.kicad_sym",
    "lmk01801bisqe.kicad_mod",
    "lmk01801bisqe.glb",
    "lmk01801bisqe.step",
    "lmk01801bisqe.lbr",
    "docs/hero.png",
    "docs/lmk01801bisqe-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lmk01801bisqe-hero.glb",
    "lmk01801bisqe-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}