component
LM4040CYM3-4.1-TR
Public Made by Adomby adom
Microchip Tech Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526
{
"schema_version": 1,
"type": "component",
"slug": "lm4040cym3-4-1-tr",
"title": "LM4040CYM3-4.1-TR",
"brief": "Microchip Tech Voltage Reference, SOT-23. 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",
"power management (pmic)",
"lm4040cym3-4.1-tr",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "LM4040CYM3-4.1-TR",
"manufacturer": "Microchip Tech",
"package": "SOT-23",
"pin_count": 3,
"category": "Power Management (PMIC)",
"subcategory": "Voltage Reference",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586187184911093760",
"parts": {
"symbol": "lm4040cym3-4-1-tr.kicad_sym",
"footprint": "lm4040cym3-4-1-tr.kicad_mod",
"model_3d": "lm4040cym3-4-1-tr-hero.glb",
"model_3d_plain": "lm4040cym3-4-1-tr-etched.glb",
"model_3d_step": "lm4040cym3-4-1-tr-etched.step",
"model_3d_step_plain": "lm4040cym3-4-1-tr.step",
"lbr": "lm4040cym3-4-1-tr.lbr"
},
"distributor_links": {
"lcsc": "C75691",
"digikey": "576-2568-2-ND",
"mouser": "998-LM4040CYM3-4.1TR"
},
"distributor_check": {
"checked_at": "2026-10-21T00:11:34Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "576-2568-2-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "998-LM4040CYM3-4.1TR",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "+",
"type": "passive",
"description": "Cathode (+) of the fixed shunt reference; connect to the positive voltage node."
},
{
"number": "2",
"name": "–",
"type": "power_in",
"description": "Anode (-) of the reference; connect to the negative voltage node, and on the SOT-23 package pin 3 must float or be connected to this pin."
},
{
"number": "3",
"name": "NC",
"type": "unconnected",
"description": "Not internally connected; it must be left floating or connected to the - pin (pin 2)."
}
],
"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 datasheet covers the LM4040 fixed-version pinout (3-pin SOT-23, pin 1 = +, pin 2 = -, pin 3 = NC; Pin types are assigned by judgment, not stated in the datasheet: the anode is marked as the negative"
],
"pages_sent": 7,
"cost_usd": 0.0273,
"at": "2026-10-21T00:09:05"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586187184911093760",
"pages": 30,
"sha256": "0e4fb1d4d0ad4f92",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 3,
"described": 3,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "lm4040cym3-4-1-tr.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
2.5,
3,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "dd5d1711204e1d8d26cd11490923bd84340820baa69538c385a4300ec2539bc0",
"checked": "2026-10-21",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "lm4040cym3-4-1-tr-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
2.5,
3,
1.2
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "bc53131606b82b38e5858ff7ffd539207525fe1c80417cda8d62895ff19d87f4",
"checked": "2026-10-21",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "SOT-23",
"Category": "Power Management (PMIC)",
"Pins": "3"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "0e4fb1d4d0ad4f923e26103ae00ed72273dc669d4de034bec6103872e5f2a6e5",
"rows": [
{
"name": "Reverse-Breakdown Voltage Tolerance (C-grade, 25°C)",
"symbol": "",
"kind": "tolerance",
"unit": "mV",
"min": -20,
"typ": null,
"max": 20,
"conditions": "IR = 100 µA, TA = +25°C",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Reverse-Breakdown Voltage Tolerance (C-grade, overtemperature)",
"symbol": "",
"kind": "tolerance",
"unit": "mV",
"min": -47,
"typ": null,
"max": 47,
"conditions": "IR = 100 µA",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Minimum Operating Current",
"symbol": "IRMIN",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 50,
"max": 68,
"conditions": "TA = +25°C",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Minimum Operating Current (overtemperature)",
"symbol": "IRMIN",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 73,
"conditions": "",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Average Reverse-Breakdown Voltage Temperature Coefficient",
"symbol": "∆VR/∆T",
"kind": "temperature_coefficient",
"unit": "ppm/°C",
"min": -100,
"typ": 20,
"max": 100,
"conditions": "IR = 1 mA",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Reverse-Breakdown Voltage Change with Operating Current Change",
"symbol": "∆VR/∆IR",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 0.5,
"max": 0.9,
"conditions": "IRMIN ≤ IR ≤ 1 mA, TA = +25°C",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Reverse-Breakdown Voltage Change with Operating Current Change (overtemperature)",
"symbol": "∆VR/∆IR",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": null,
"max": 1.2,
"conditions": "IRMIN ≤ IR ≤ 1 mA",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Reverse-Breakdown Voltage Change with Operating Current Change",
"symbol": "∆VR/∆IR",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 3,
"max": 7,
"conditions": "1 mA ≤ IR ≤ 15 mA, TA = +25°C",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Reverse-Breakdown Voltage Change with Operating Current Change (overtemperature)",
"symbol": "∆VR/∆IR",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": null,
"max": 10,
"conditions": "1 mA ≤ IR ≤ 15 mA",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Reverse Dynamic Impedance",
"symbol": "ZR",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 0.5,
"max": 1,
"conditions": "IR = 1 mA, f = 120 Hz, IAC = 0.1 IR, TA = +25°C",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Reverse Current (LM4040-4.1) lower operating limit",
"symbol": "IR",
"kind": "recommended_operating",
"unit": "µA",
"min": 68,
"typ": null,
"max": null,
"conditions": "Operating Ratings, LM4040-4.1",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Reverse Current (LM4040-4.1) upper operating limit",
"symbol": "IR",
"kind": "recommended_operating",
"unit": "mA",
"min": null,
"typ": null,
"max": 15,
"conditions": "Operating Ratings, LM4040-4.1",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Operating Temperature Range",
"symbol": "TA",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "",
"source_page": 15,
"source": "datasheet"
},
{
"name": "Reverse Current",
"symbol": "IR",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 20,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Forward Current",
"symbol": "IF",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 10,
"conditions": "",
"source_page": 3,
"source": "datasheet"
},
{
"name": "ESD Susceptibility (HBM)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "kV",
"min": null,
"typ": null,
"max": 2,
"conditions": "Human body model, Note 2",
"source_page": 3,
"source": "datasheet"
},
{
"name": "ESD Susceptibility (MM)",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 200,
"conditions": "Machine model, Note 2",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Storage Temperature",
"symbol": "TS",
"kind": "absolute_maximum",
"unit": "°C",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 15,
"source": "datasheet"
},
{
"name": "Maximum Junction Temperature",
"symbol": "TJMAX",
"kind": "absolute_maximum",
"unit": "°C",
"min": null,
"typ": null,
"max": 125,
"conditions": "Note 1",
"source_page": 3,
"source": "datasheet"
},
{
"name": "Lead Temperature (vapor phase)",
"symbol": "",
"kind": "thermal",
"unit": "°C",
"min": null,
"typ": null,
"max": 215,
"conditions": "Vapor phase, 60 s",
"source_page": 15,
"source": "datasheet"
},
{
"name": "Lead Temperature (infrared)",
"symbol": "",
"kind": "thermal",
"unit": "°C",
"min": null,
"typ": null,
"max": 220,
"conditions": "Infrared, 15 s",
"source_page": 15,
"source": "datasheet"
},
{
"name": "Reverse-Breakdown Voltage",
"symbol": "VR",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": 4.096,
"max": null,
"conditions": "IR = 100 µA, TA = +25°C",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Average Reverse-Breakdown Voltage Temperature Coefficient",
"symbol": "∆VR/∆T",
"kind": "temperature_coefficient",
"unit": "ppm/°C",
"min": null,
"typ": 30,
"max": null,
"conditions": "IR = 10 mA, TA = +25°C",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Average Reverse-Breakdown Voltage Temperature Coefficient",
"symbol": "∆VR/∆T",
"kind": "temperature_coefficient",
"unit": "ppm/°C",
"min": null,
"typ": 20,
"max": null,
"conditions": "IR = 100 µA, TA = +25°C",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Wideband Noise",
"symbol": "eN",
"kind": "electrical",
"unit": "µVRMS",
"min": null,
"typ": 80,
"max": null,
"conditions": "IR = 100 µA, TA = +25°C, 10 Hz ≤ f ≤ 10 kHz",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Reverse-Breakdown Voltage Long-Term Stability",
"symbol": "∆VR",
"kind": "electrical",
"unit": "ppm",
"min": null,
"typ": 120,
"max": null,
"conditions": "t = 1000 hrs., TA = +25°C ±0.1°C, IR = 100 µA",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Package Thermal Resistance, junction to ambient (3-Pin SOT-23)",
"symbol": "ΘJA",
"kind": "thermal",
"unit": "°C/W",
"min": null,
"typ": 326,
"max": null,
"conditions": "Board-mounted",
"source_page": 15,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"lm4040cym3-4.1-tr"
],
"discovery_pitch": "LM4040CYM3-4.1-TR (Microchip Tech) 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",
"lm4040cym3-4-1-tr.kicad_sym",
"lm4040cym3-4-1-tr.kicad_mod",
"lm4040cym3-4-1-tr.glb",
"lm4040cym3-4-1-tr.step",
"lm4040cym3-4-1-tr.lbr",
"docs/hero.png",
"docs/lm4040cym3-4-1-tr-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"lm4040cym3-4-1-tr-hero.glb",
"lm4040cym3-4-1-tr-hero.overlay.json",
"lm4040cym3-4-1-tr-etched.glb"
],
"visibility": {
"public": true
}
}