component
LMX2531LQ1146E
Public Made by Adomby adom
Texas Instruments Clock Generators, PLLs, Frequency Synthesizers, WQFN-36(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"type": "component",
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"title": "LMX2531LQ1146E",
"brief": "Texas Instruments Clock Generators, PLLs, Frequency Synthesizers, WQFN-36(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
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"component": {
"mpn": "LMX2531LQ1146E",
"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": {
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"distributor_links": {
"lcsc": "C2662644"
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"distributor_check": {
"checked_at": "2026-10-08T15:51:59Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
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"pn": null,
"status": "no match"
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"pins": [
{
"number": "1",
"name": "VccDIG",
"type": "power_in",
"description": "Power supply for the digital LDO circuitry; input may range from 2.8 to 3.2 V, with bypass capacitors placed as close as possible to the pin and ground."
},
{
"number": "2",
"name": "NC",
"type": "unconnected",
"description": "No connect pin; the datasheet notes there is no advantage to grounding it."
},
{
"number": "3",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "4",
"name": "NC",
"type": "unconnected",
"description": "No connect pin; the datasheet notes there is no advantage to grounding it."
},
{
"number": "5",
"name": "NC",
"type": "unconnected",
"description": "No connect pin; the datasheet notes there is no advantage to grounding it."
},
{
"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 pin; the datasheet notes there is no advantage to grounding it."
},
{
"number": "8",
"name": "DATA",
"type": "input",
"description": "MICROWIRE serial data input; high-impedance CMOS input that must not exceed 2.75 V, with data clocked in MSB first."
},
{
"number": "9",
"name": "CLK",
"type": "input",
"description": "MICROWIRE clock input; high-impedance CMOS input that must not exceed 2.75 V, with data clocked into the shift register on the rising edge."
},
{
"number": "10",
"name": "LE",
"type": "input",
"description": "MICROWIRE latch enable input; high-impedance CMOS input that must not exceed 2.75 V, with shift register data loaded into the selected latch when LE goes HIGH."
},
{
"number": "11",
"name": "CE",
"type": "input",
"description": "Chip enable input; high-impedance CMOS input that must not exceed 2.75 V, with the device powered up when CE is high."
},
{
"number": "12",
"name": "NC",
"type": "unconnected",
"description": "No connect pin; the datasheet notes there is no advantage to grounding it."
},
{
"number": "13",
"name": "NC",
"type": "unconnected",
"description": "No connect pin; the datasheet notes there is no advantage to grounding it."
},
{
"number": "14",
"name": "NC",
"type": "unconnected",
"description": "No connect pin that must not be grounded; the datasheet states this also applies to the pad above these pins."
},
{
"number": "15",
"name": "NC",
"type": "unconnected",
"description": "No connect pin that must not be grounded; the datasheet states this also applies to the pad above these pins."
},
{
"number": "16",
"name": "VccVCO",
"type": "power_in",
"description": "Power supply for the VCO regulator circuitry; input may range from 2.8 to 3.2 V, with bypass capacitors placed as close as possible to the pin and ground."
},
{
"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": "power_out",
"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 may range from 2.8 to 3.2 V, with bypass capacitors placed as close as possible to the pin and ground."
},
{
"number": "23",
"name": "Vtune",
"type": "input",
"description": "Tuning voltage input for the VCO, connected to the CPout pin through an external passive loop filter."
},
{
"number": "24",
"name": "CPout",
"type": "output",
"description": "Charge pump output for the PLL, 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."
},
{
"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 may range from 2.8 to 3.2 V, with bypass capacitors placed as close as possible to the pin and ground."
},
{
"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 pin; the datasheet notes there is no advantage to grounding it."
},
{
"number": "30",
"name": "Ftest/LD",
"type": "output",
"description": "Multiplexed CMOS output typically used to monitor PLL lock condition; 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 that should be grounded for normal operation."
},
{
"number": "34",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "35",
"name": "NC",
"type": "unconnected",
"description": "No connect pin; the datasheet notes there is no advantage to grounding it."
},
{
"number": "36",
"name": "VregDIG",
"type": "power_out",
"description": "Internally regulated voltage for the LDO digital circuitry; a 10 nF bypass capacitor is recommended."
},
{
"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: The Pin Configuration drawing text is garbled in the extract, so pin numbers were taken from the Pin; The datasheet assigns LMX2531LQ1146E to the NJH0036D (D version) package drawing; the NJG0036A (A ve; The exposed die attach pad (DAP) is referenced in the Do's and Don'ts section as grounded but has no",
"exposed pad 37 added from the footprint"
],
"pages_sent": 16,
"cost_usd": 0.1256,
"at": "2026-10-08T15:51:40"
},
"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": {
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"described": 37,
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},
"metadata": {
"specs": {
"Manufacturer": "Texas Instruments",
"Package": "WQFN-36(6x6)",
"Category": "Clock/Timing",
"Pins": "37"
}
},
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"email": "[email protected]"
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