component
TL431CSF
Public Made by Adomby adom
HTC Korea TAEJIN Tech Voltage Reference, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403
{
"schema_version": 1,
"type": "component",
"slug": "tl431csf",
"title": "TL431CSF",
"brief": "HTC Korea TAEJIN 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)",
"tl431csf",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "TL431CSF",
"manufacturer": "HTC Korea TAEJIN Tech",
"package": "SOT-23",
"pin_count": 3,
"category": "Power Management (PMIC)",
"subcategory": "Voltage Reference",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586182808603660288",
"parts": {
"symbol": "tl431csf.kicad_sym",
"footprint": "tl431csf.kicad_mod",
"model_3d": "tl431csf-hero.glb",
"model_3d_plain": "tl431csf-etched.glb",
"model_3d_step": "tl431csf-etched.step",
"model_3d_step_plain": "tl431csf.step",
"lbr": "tl431csf.lbr"
},
"distributor_links": {
"lcsc": "C126097"
},
"distributor_check": {
"checked_at": "2026-10-18T09:38:06Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"pins": [
{
"number": "1",
"name": "Reference",
"type": "input",
"description": "Reference voltage input that sets the cathode regulation point (VREF about 2.495 V; TL431C 2.483 to 2.507 V at IK = 10 mA) and must be driven through the external divider resistors."
},
{
"number": "2",
"name": "Anode",
"type": "power_in",
"description": "Ground (common) terminal of the shunt regulator, through which the cathode current returns; recommended cathode current IK is 0.5 mA to 100 mA."
},
{
"number": "3",
"name": "Cathode",
"type": "power_in",
"description": "Cathode (regulated output) terminal, specified as Input Supply Voltage in the datasheet, with recommended operating voltage VREF to 40 V, absolute maximum cathode voltage 42 V, and continuous cathode current -100 to 150 mA."
}
],
"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's pin description table labels pin 2 'Ground' and pin 3 'Input Supply Voltage', so I m; Pin numbers are confirmed for the SOT-23 package only as printed in the page 1 and page 4 pin listin; The datasheet does not give a separate pinout for the TL431CSF variant; the single pinout applies to"
],
"pages_sent": 12,
"cost_usd": 0.0385,
"at": "2026-10-18T09:35:12"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586182808603660288",
"pages": 12,
"sha256": "0a0d5fc0a3221190",
"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": "tl431csf.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": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "tl431csf-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": "9083448a02e74592fcb1b5f46ffd7cd809c457753b5b892f5911c9e9efca5f5b",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "HTC Korea TAEJIN Tech",
"Package": "SOT-23",
"Category": "Power Management (PMIC)",
"Pins": "3"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "0a0d5fc0a322119015c6323473cf5ab4838370b4fd2ea536b3056c3983cd0d5d",
"rows": [
{
"name": "Reference Input Voltage (TL431C, 0.5%)",
"symbol": "VREF",
"kind": "electrical",
"unit": "V",
"min": 2.483,
"typ": 2.495,
"max": 2.507,
"conditions": "VKA =VREF, IK =10mA",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Deviation of Reference Input Voltage (full range)",
"symbol": "ΔVREF/ΔT",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 8,
"max": 20,
"conditions": "VKA = VREF, IK =10mA, TA =Full Range",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Ratio of Change in Reference Input Voltage to Change in Cathode Voltage (ΔVKA=10V-VREF)",
"symbol": "ΔVREF/ΔVKA",
"kind": "electrical",
"unit": "mV/V",
"min": null,
"typ": -1.4,
"max": -2.7,
"conditions": "IK =10mA, ΔVKA=10V -VREF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Ratio of Change in Reference Input Voltage to Change in Cathode Voltage (ΔVKA=36V-10V)",
"symbol": "ΔVREF/ΔVKA",
"kind": "electrical",
"unit": "mV/V",
"min": null,
"typ": -1,
"max": -2,
"conditions": "IK =10mA, ΔVKA=36V-10V",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Reference Input Current",
"symbol": "IREF",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 1.8,
"max": 4,
"conditions": "IKA=10mA, R1=10kΩ, R2=∞",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Deviation of Reference Input Current (full range)",
"symbol": "ΔIREF/ΔT",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 0.4,
"max": 1.2,
"conditions": "IK =10mA, R1=10kΩ, R2=∞, TA =Full Range",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Minimum Cathode Current for Regulation",
"symbol": "IK(MIN)",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.5,
"max": null,
"conditions": "VKA= VREF",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Off-State Cathode Current",
"symbol": "IK(OFF)",
"kind": "electrical",
"unit": "uA",
"min": null,
"typ": 0.17,
"max": 0.9,
"conditions": "VKA=36V, VREF=0",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Dynamic Impedance",
"symbol": "ZKA",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 0.27,
"max": 0.5,
"conditions": "VKA= VREF, IK =1mA~100mA, f ≤ 1kHz",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Cathode Voltage (recommended)",
"symbol": "VKA",
"kind": "recommended_operating",
"unit": "V",
"min": null,
"typ": null,
"max": 40,
"conditions": "Minimum is VREF (not a numeric limit)",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Cathode Current (recommended)",
"symbol": "IK",
"kind": "recommended_operating",
"unit": "mA",
"min": 0.5,
"typ": null,
"max": 100,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Cathode Voltage (absolute maximum)",
"symbol": "VKA",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 42,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Cathode Current Range (Continuous)",
"symbol": "IK",
"kind": "absolute_maximum",
"unit": "mA",
"min": -100,
"typ": null,
"max": 150,
"conditions": "Continuous",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Reference Input Current Range",
"symbol": "IREF",
"kind": "absolute_maximum",
"unit": "mA",
"min": -0.05,
"typ": null,
"max": 10,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Junction Temperature Range",
"symbol": "TJ",
"kind": "absolute_maximum",
"unit": "℃",
"min": -40,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Operating Temperature Range",
"symbol": "TOPR",
"kind": "absolute_maximum",
"unit": "℃",
"min": -40,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Storage Temperature Range",
"symbol": "TSTG",
"kind": "absolute_maximum",
"unit": "℃",
"min": -65,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 1,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"tl431csf"
],
"discovery_pitch": "TL431CSF (HTC Korea TAEJIN 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",
"tl431csf.kicad_sym",
"tl431csf.kicad_mod",
"tl431csf.glb",
"tl431csf.step",
"tl431csf.lbr",
"docs/hero.png",
"docs/tl431csf-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"tl431csf-hero.glb",
"tl431csf-hero.overlay.json",
"tl431csf-etched.glb"
],
"visibility": {
"public": true
}
}