component
TMI8120
Public Made by Adomby adom
TMI Stepper Motor Driver, QFN-20-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "tmi8120",
"version": "0.1.0",
"type": "component",
"description": "TMI Stepper Motor Driver, QFN-20-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"motor driver ics",
"tmi8120",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"tmi8120.kicad_sym",
"tmi8120.kicad_mod",
"tmi8120.glb",
"tmi8120.step",
"tmi8120.lbr",
"docs/hero.png",
"docs/tmi8120-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"tmi8120-hero.glb",
"tmi8120-hero.overlay.json",
"tmi8120-etched.glb"
],
"component": {
"mpn": "TMI8120",
"manufacturer": "TMI",
"package": "QFN-20-EP(3x3)",
"pin_count": 21,
"category": "Motor Driver ICs",
"subcategory": "Stepper Motor Driver",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590455774162939904",
"parts": {
"symbol": "tmi8120.kicad_sym",
"footprint": "tmi8120.kicad_mod",
"model_3d": "tmi8120-hero.glb",
"model_3d_plain": "tmi8120-etched.glb",
"model_3d_step": "tmi8120-etched.step",
"model_3d_step_plain": "tmi8120.step",
"lbr": "tmi8120.lbr"
},
"distributor_links": {
"lcsc": "C5259218"
},
"distributor_check": {
"checked_at": "2026-10-18T02:29:13Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "OUT1",
"type": "output",
"description": "H-bridge output to connect directly to the motor or other inductive load; channel 1 on-resistance is 550 mΩ typ at 1A load."
},
{
"number": "2",
"name": "IN2",
"type": "input",
"description": "Logic input controlling the H-bridge output; logic high requires at least 2.0V and logic low is 0.8V max, with an internal pulldown to GND."
},
{
"number": "3",
"name": "IN1",
"type": "input",
"description": "Logic input controlling the H-bridge output; logic high requires at least 2.0V and logic low is 0.8V max, with an internal pulldown to GND."
},
{
"number": "4",
"name": "OUT3",
"type": "output",
"description": "H-bridge output to connect directly to the motor or other inductive load; the datasheet lists this pin as OUT3 (see review notes)."
},
{
"number": "5",
"name": "OUT3",
"type": "output",
"description": "H-bridge output to connect directly to the motor or other inductive load; the datasheet lists this pin as OUT3 (see review notes)."
},
{
"number": "6",
"name": "IN3",
"type": "input",
"description": "Logic input controlling the H-bridge output; logic high requires at least 2.0V and logic low is 0.8V max, with an internal pulldown to GND."
},
{
"number": "7",
"name": "IN4",
"type": "input",
"description": "Logic input controlling the H-bridge output; logic high requires at least 2.0V and logic low is 0.8V max, with an internal pulldown to GND."
},
{
"number": "8",
"name": "VDD2",
"type": "power_in",
"description": "Power supply for the second H-bridge, 2.4V to 7.2V."
},
{
"number": "9",
"name": "VDD2",
"type": "power_in",
"description": "Power supply for the second H-bridge, 2.4V to 7.2V."
},
{
"number": "10",
"name": "OUT4",
"type": "output",
"description": "H-bridge output to connect directly to the motor or other inductive load; channel 2 on-resistance is 550 mΩ typ at 1A load."
},
{
"number": "11",
"name": "OUT4",
"type": "output",
"description": "H-bridge output to connect directly to the motor or other inductive load; channel 2 on-resistance is 550 mΩ typ at 1A load."
},
{
"number": "12",
"name": "NC",
"type": "unconnected",
"description": "Not connected."
},
{
"number": "13",
"name": "VDD1",
"type": "power_in",
"description": "Power supply for the first H-bridge, 2.4V to 7.2V."
},
{
"number": "14",
"name": "VDD1",
"type": "power_in",
"description": "Power supply for the first H-bridge, 2.4V to 7.2V."
},
{
"number": "15",
"name": "OUT2",
"type": "output",
"description": "H-bridge output to connect directly to the motor or other inductive load; channel 1 on-resistance is 550 mΩ typ at 1A load."
},
{
"number": "16",
"name": "OUT2",
"type": "output",
"description": "H-bridge output to connect directly to the motor or other inductive load; channel 1 on-resistance is 550 mΩ typ at 1A load."
},
{
"number": "17",
"name": "GND1",
"type": "power_in",
"description": "Logic ground; connect to board ground."
},
{
"number": "18",
"name": "GND1",
"type": "power_in",
"description": "Logic ground; connect to board ground."
},
{
"number": "19",
"name": "NC",
"type": "unconnected",
"description": "Not connected."
},
{
"number": "20",
"name": "OUT1",
"type": "output",
"description": "H-bridge output to connect directly to the motor or other inductive load; channel 1 on-resistance is 550 mΩ typ at 1A load."
},
{
"number": "21",
"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 datasheet pin table names both pin 4 and pin 5 as OUT3. Pins 10 and 11 are OUT4 and pins 1/20 ar; Pins 1 and 20 are both printed as OUT1. This looks like intentional paralleling of the output pins, ; The exposed pad is labeled TP (thermal pad, connect to ground) rather than a numbered pin. Its type ",
"exposed pad 21 added from the footprint",
"dropped thermal pad ['TP'] absent from footprint"
],
"pages_sent": 9,
"cost_usd": 0.0513,
"at": "2026-10-18T02:27:49"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590455774162939904",
"pages": 9,
"sha256": "0455e94341abc96b",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 21,
"described": 21,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
3.0,
3.0,
0.52
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "0ee4e1082236390795238cd34b082d96efd160d6292c636cc40201a5a30cdc63",
"checked": "2026-10-18",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "tmi8120-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
3.0,
3.0,
0.52
],
"zmin_mm": 0.0,
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"footprint_binding": "identity",
"sha256": "95b8b501ee1c0944d9f284995aa6a4a520fb90ab421c1dbaa3fedfdf3ffc6bfc",
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"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}