component
A4992KLPTR-T
Public Made by Adomby adom
Allegro MicroSystems, LLC Motor Driver ICs, TSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"type": "component",
"slug": "a4992klptr-t",
"title": "A4992KLPTR-T",
"brief": "Allegro MicroSystems, LLC Motor Driver ICs, TSSOP-20-EP. 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 supply chip",
"a4992klptr-t",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "A4992KLPTR-T",
"manufacturer": "Allegro MicroSystems, LLC",
"package": "TSSOP-20-EP",
"pin_count": 21,
"category": "Power Supply Chip",
"subcategory": "Motor Driver ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/105b4f81448bc6cc3fbfd4dc286d5b97.pdf",
"parts": {
"symbol": "a4992klptr-t.kicad_sym",
"footprint": "a4992klptr-t.kicad_mod",
"model_3d": "a4992klptr-t-hero.glb",
"model_3d_plain": "a4992klptr-t-etched.glb",
"model_3d_step": "a4992klptr-t-etched.step",
"model_3d_step_plain": "a4992klptr-t.step",
"lbr": "a4992klptr-t.lbr"
},
"distributor_links": {
"lcsc": "C459295",
"digikey": "620-1521-2-ND",
"mouser": "250-A4992KLPTR-T"
},
"distributor_check": {
"checked_at": "2026-10-27T00:36:58Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "620-1521-2-ND",
"status": "found"
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"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "SENSA",
"type": "input",
"description": "Phase A current sense; connect the sense resistor between SENSA and PGND, with SENSA rated -0.3 to 1 V with respect to PGND."
},
{
"number": "2",
"name": "OAP",
"type": "output",
"description": "Motor connection for phase A, positive terminal; positive phase current flows from OAM to OAP."
},
{
"number": "3",
"name": "RESETn",
"type": "input",
"description": "Resets faults when pulsed low and forces low-power sleep mode when held low longer than tRSD; can be pulled to VBB through 38 kΩ."
},
{
"number": "4",
"name": "DIR",
"type": "input",
"description": "Direction logic input with internal pull-down; in serial mode it is the SDI serial data input accepting a 16-bit MSB-first word."
},
{
"number": "5",
"name": "REF",
"type": "input",
"description": "Reference input that sets the absolute maximum current level for both phases; it defaults to the internal reference when driven above 2.5 V."
},
{
"number": "6",
"name": "AGND",
"type": "power_in",
"description": "Analog reference ground and quiet return for measurement and input references; connect to PGND."
},
{
"number": "7",
"name": "MS",
"type": "input",
"description": "Microstep resolution select input with internal pull-down; in serial mode it is the SCK serial clock and must be held high when STEP changes."
},
{
"number": "8",
"name": "OBP",
"type": "output",
"description": "Motor connection for phase B, positive terminal; positive phase current flows from OBM to OBP."
},
{
"number": "9",
"name": "PGND",
"type": "power_in",
"description": "Digital and power ground; connect to the supply ground and to AGND."
},
{
"number": "10",
"name": "SENSB",
"type": "input",
"description": "Phase B current sense; connect the sense resistor between SENSB and PGND, with SENSB rated -0.3 to 1 V with respect to PGND."
},
{
"number": "11",
"name": "VBB",
"type": "power_in",
"description": "Main motor supply and chip supply for the internal regulators and charge pump; both VBB pins must be connected together and decoupled to ground."
},
{
"number": "12",
"name": "OBM",
"type": "output",
"description": "Motor connection for phase B, negative terminal."
},
{
"number": "13",
"name": "VREG",
"type": "power_out",
"description": "Regulated supply for bridge gate drive, decoupled to ground with a 470 nF (10 V) ceramic capacitor."
},
{
"number": "14",
"name": "DIAG",
"type": "output",
"description": "Diagnostic open-drain output, active low, indicating a fault when low; it requires an external pull-up resistor."
},
{
"number": "15",
"name": "STEP",
"type": "input",
"description": "Step logic input with internal pull-down; the motor advances on the rising edge, and in serial mode it is the active-low STRn serial data strobe."
},
{
"number": "16",
"name": "VCP",
"type": "power_out",
"description": "Above-supply voltage for high-side drive; a 100 nF (16 V) ceramic capacitor is connected between VCP and VBB."
},
{
"number": "17",
"name": "CP1",
"type": "passive",
"description": "Charge pump capacitor connection; a 100 nF (50 V) ceramic capacitor is connected between CP1 and CP2."
},
{
"number": "18",
"name": "CP2",
"type": "passive",
"description": "Charge pump capacitor connection; a 100 nF (50 V) ceramic capacitor is connected between CP1 and CP2."
},
{
"number": "19",
"name": "OAM",
"type": "output",
"description": "Motor connection for phase A, negative terminal; positive phase current flows from OAM to OAP."
},
{
"number": "20",
"name": "VBB",
"type": "power_in",
"description": "Main motor supply and chip supply for the internal regulators and charge pump; both VBB pins must be connected together and decoupled to ground."
},
{
"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 exposed thermal pad (PAD) is listed in the terminal list with no pin number (printed as a dash),; Pin descriptions are taken from the Pin Functions section on page 11. Only the Absolute Maximum Rati",
"7/21 pins cited to the wrong page (name found elsewhere): ['7:MS@p11', '14:DIAG@p11', '15:STEP@p11', '17:CP1@p11']"
],
"pages_sent": 11,
"cost_usd": 0.0241,
"at": "2026-10-27T00:36:25"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/105b4f81448bc6cc3fbfd4dc286d5b97.pdf",
"pages": 29,
"sha256": "16cbf88bc32f0574",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 21,
"described": 21,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
},
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"file": "a4992klptr-t.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.41,
6.5,
1.2
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "b7d5b61e585e5097ad0b2ca5908cb3cc0c061ea0507fa8f3005445bab6251393",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "a4992klptr-t-etched.step",
"role": "eda",
"up": "Z",
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"origin": "footprint origin = pad-pattern centre",
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"footprint_binding": "identity",
"sha256": "32250171b85c99419d077e68b18a18215f2aade5798d68e5959c8e2b082dbba1",
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},
"metadata": {
"specs": {
"Manufacturer": "Allegro MicroSystems, LLC",
"Package": "TSSOP-20-EP",
"Category": "Power Supply Chip",
"Pins": "21"
},
"appearance": {
"contacts": {
"quote": "lead (Pb) free with 100% matte-tin lead frame plating. A4992-DS, Rev. 3",
"page": 1,
"doc": "ds.pdf",
"plating": "tin"
},
"version": 1,
"datasheet_sha256": "16cbf88bc32f05743e2e5c198c88b48680676b513df07584cfeb2921eb50678d"
},
"characteristics": {
"version": 1,
"source": "datasheet",
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"rows": [
{
"name": "Supply Voltage Range",
"symbol": "VBB",
"kind": "electrical",
"unit": "V",
"min": 0,
"typ": null,
"max": 50,
"conditions": "Functional, no unsafe states",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Supply Voltage Range (outputs driving)",
"symbol": "VBB",
"kind": "electrical",
"unit": "V",
"min": 3.8,
"typ": null,
"max": null,
"conditions": "Outputs driving",
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},
{
"name": "Supply Quiescent Current",
"symbol": "IBBQ",
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"unit": "mA",
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"conditions": "DIS = 1",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Supply Quiescent Current",
"symbol": "IBBQ",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": 1,
"max": 10,
"conditions": "RESETn < 0.5 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Internal Regulator Dropout Voltage",
"symbol": "VREGDO",
"kind": "electrical",
"unit": "mV",
"min": null,
"typ": 100,
"max": 200,
"conditions": "DIS = 1, RESETn = 1, VBB > 6 V",
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{
"name": "High-Side On-Resistance",
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"kind": "electrical",
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"max": 600,
"conditions": "VBB = 13.5 V, IOUT = –1 A, TJ = 25°C",
"source_page": 6,
"source": "datasheet"
},
{
"name": "High-Side On-Resistance",
"symbol": "RDS(on)H",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 900,
"max": 1100,
"conditions": "VBB = 13.5 V, IOUT = –1 A, TJ = 150°C",
"source_page": 6,
"source": "datasheet"
},
{
"name": "High-Side On-Resistance",
"symbol": "RDS(on)H",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 625,
"max": 750,
"conditions": "VBB = 7 V, IOUT = –1 A, TJ = 25°C",
"source_page": 6,
"source": "datasheet"
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{
"name": "High-Side Body Diode Forward Voltage",
"symbol": "VfH",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 1.4,
"conditions": "If = 1 A",
"source_page": 6,
"source": "datasheet"
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{
"name": "Low-Side On-Resistance",
"symbol": "RDS(on)L",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 500,
"max": 600,
"conditions": "VBB =13.5 V, IOUT = 1 A, TJ = 25°C",
"source_page": 6,
"source": "datasheet"
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{
"name": "Low-Side On-Resistance",
"symbol": "RDS(on)L",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 900,
"max": 1100,
"conditions": "VBB = 13.5 V, IOUT = 1 A, TJ = 150°C",
"source_page": 6,
"source": "datasheet"
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{
"name": "Low-Side On-Resistance",
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"unit": "mΩ",
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"typ": 625,
"max": 750,
"conditions": "VBB = 7 V, IOUT = 1 A, TJ = 25°C",
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{
"name": "Low-Side Body Diode Forward Voltage",
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"conditions": "If = –1 A",
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"source": "datasheet"
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{
"name": "Output Leakage Current",
"symbol": "IOUT(Lkg)",
"kind": "electrical",
"unit": "µA",
"min": -120,
"typ": -65,
"max": null,
"conditions": "DIS = 1, RESETn = 1, VOUT = VBB",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Output Leakage Current",
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"min": -200,
"typ": -120,
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"conditions": "DIS = 1, RESETn = 1, VOUT = 0 V",
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{
"name": "Output Leakage Current",
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"min": null,
"typ": null,
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"conditions": "DIS = 1, RESETn = 0, VOUT = VBB",
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{
"name": "Output Leakage Current",
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"kind": "electrical",
"unit": "µA",
"min": -20,
"typ": null,
"max": null,
"conditions": "DIS = 1, RESETn = 0, VOUT = 0 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Internal Oscillator Frequency",
"symbol": "fOSC",
"kind": "electrical",
"unit": "MHz",
"min": 3.6,
"typ": 4,
"max": 4.4,
"conditions": "",
"source_page": 6,
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},
{
"name": "Reference Input Voltage",
"symbol": "VREF",
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"min": 0.8,
"typ": null,
"max": 2,
"conditions": "",
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},
{
"name": "Internal Reference Voltage",
"symbol": "VREFint",
"kind": "electrical",
"unit": "V",
"min": 1.1,
"typ": 1.2,
"max": 1.3,
"conditions": "VREF > 2.5 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Current Trip Point Error",
"symbol": "EITrip",
"kind": "tolerance",
"unit": "%",
"min": -5,
"typ": null,
"max": 5,
"conditions": "VREF = 2 V",
"source_page": 6,
"source": "datasheet"
},
{
"name": "Input Low Voltage",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.8,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Input Low Voltage for Sleep Mode",
"symbol": "VILS",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.5,
"conditions": "RESETn input only",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Input High Voltage",
"symbol": "VIH",
"kind": "electrical",
"unit": "V",
"min": 2,
"typ": null,
"max": null,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Input Hysteresis",
"symbol": "VIHys",
"kind": "electrical",
"unit": "mV",
"min": 100,
"typ": 300,
"max": null,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Output Low Voltage",
"symbol": "VOL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.4,
"conditions": "IOL = 2 mA",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Reset Pulse Width",
"symbol": "tRST",
"kind": "timing",
"unit": "µs",
"min": 1,
"typ": null,
"max": 6,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Reset Shutdown Pulse Width",
"symbol": "tRSD",
"kind": "timing",
"unit": "µs",
"min": 40,
"typ": null,
"max": null,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "STEP High",
"symbol": "tSTPL",
"kind": "timing",
"unit": "µs",
"min": 1,
"typ": null,
"max": null,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "STEP Low",
"symbol": "tSTPH",
"kind": "timing",
"unit": "µs",
"min": 1,
"typ": null,
"max": null,
"conditions": "",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Setup Time",
"symbol": "tSU",
"kind": "timing",
"unit": "ns",
"min": 200,
"typ": null,
"max": null,
"conditions": "MS, DIR; from control input change to STEP change",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Hold Time",
"symbol": "tH",
"kind": "timing",
"unit": "ns",
"min": 200,
"typ": null,
"max": null,
"conditions": "MS, DIR; from STEP change to control input change",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Wake-Up from Reset",
"symbol": "tEN",
"kind": "timing",
"unit": "ms",
"min": null,
"typ": null,
"max": 1,
"conditions": "",
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"source": "datasheet"
},
{
"name": "Data In Hold Time from Clock Rising",
"symbol": "tSDIH",
"kind": "timing",
"unit": "ns",
"min": 10,
"typ": null,
"max": null,
"conditions": "Reference G",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Strobe High Time",
"symbol": "tSTRH",
"kind": "timing",
"unit": "ns",
"min": 1100,
"typ": null,
"max": null,
"conditions": "Reference E",
"source_page": 7,
"source": "datasheet"
},
{
"name": "Sequence Minimum Hold Time",
"symbol": "tSSH",
"kind": "timing",
"unit": "µs",
"min": 58,
"typ": 64.5,
"max": 72,
"conditions": "Reference H",
"source_page": 7,
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},
{
"name": "Serial Mode Exit Time",
"symbol": "tSSEX",
"kind": "timing",
"unit": "µs",
"min": null,
"typ": null,
"max": 2,
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