component
A3918SESTR-T
Public Made by Adomby adom
Allegro MicroSystems LLC Brushed DC Motor Drivers, QFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "a3918sestr-t",
"version": "0.1.0",
"type": "component",
"description": "Allegro MicroSystems LLC Brushed DC Motor Drivers, QFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"motor driver ics",
"a3918sestr-t",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"a3918sestr-t.kicad_sym",
"a3918sestr-t.kicad_mod",
"a3918sestr-t.glb",
"a3918sestr-t.step",
"a3918sestr-t.lbr",
"docs/hero.png",
"docs/a3918sestr-t-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"a3918sestr-t-hero.glb",
"a3918sestr-t-hero.overlay.json",
"a3918sestr-t-etched.glb"
],
"component": {
"mpn": "A3918SESTR-T",
"manufacturer": "Allegro MicroSystems LLC",
"package": "QFN-16-EP(3x3)",
"pin_count": 17,
"category": "Motor Driver ICs",
"subcategory": "Brushed DC Motor Drivers",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588930927317684224",
"parts": {
"symbol": "a3918sestr-t.kicad_sym",
"footprint": "a3918sestr-t.kicad_mod",
"model_3d": "a3918sestr-t-hero.glb",
"model_3d_plain": "a3918sestr-t-etched.glb",
"model_3d_step": "a3918sestr-t-etched.step",
"model_3d_step_plain": "a3918sestr-t.step",
"lbr": "a3918sestr-t.lbr"
},
"distributor_links": {
"lcsc": "C2649429",
"digikey": "620-1476-2-ND",
"mouser": "250-A3918SESTR-T"
},
"distributor_check": {
"checked_at": "2026-10-21T01:58:39Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "620-1476-2-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "250-A3918SESTR-T",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "CP2",
"type": "passive",
"description": "Charge pump capacitor terminal 2; a 0.1 µF ceramic capacitor connects between CP1 and CP2 for pumping."
},
{
"number": "2",
"name": "GND",
"type": "power_in",
"description": "Ground terminal that should connect to a low-impedance single-point star ground located very close to the device."
},
{
"number": "3",
"name": "SLEEP",
"type": "input",
"description": "Active-low sleep logic input; VIN below 0.4 V puts the device in sleep mode (150 nA typ, 500 nA max) and a logic high allows normal operation."
},
{
"number": "4",
"name": "IN1",
"type": "input",
"description": "Control input 1 for PWM and direction control, with VIN(1) min 2.0 V, VIN(0) max 0.8 V, and absolute logic input range -0.3 to 7 V."
},
{
"number": "5",
"name": "IN2",
"type": "input",
"description": "Control input 2 for PWM and direction control, with VIN(1) min 2.0 V, VIN(0) max 0.8 V, and absolute logic input range -0.3 to 7 V."
},
{
"number": "6",
"name": "GND",
"type": "power_in",
"description": "Ground terminal that should connect to a low-impedance single-point star ground located very close to the device."
},
{
"number": "7",
"name": "FL",
"type": "output",
"description": "Current limit flag output that is pulled low when the peak current is reached, with asserted voltage max 200 mV at 1 mA and leakage max 1 µA; it does not affect driver operation."
},
{
"number": "8",
"name": "GND",
"type": "power_in",
"description": "Ground terminal that should connect to a low-impedance single-point star ground located very close to the device."
},
{
"number": "9",
"name": "VBB",
"type": "power_in",
"description": "Load supply voltage with operating range 2.5 to 9 V and absolute maximum 9.6 V."
},
{
"number": "10",
"name": "OUTB",
"type": "output",
"description": "DMOS full-bridge output B driving the motor winding, with continuous output current rated at 1 A and peak 1.5 A (DC < 30%)."
},
{
"number": "11",
"name": "SENSE",
"type": "passive",
"description": "Current sense resistor terminal whose voltage must not exceed 0.5 V continuous or 1 V pulsed (tw < 1 µs), and which should be shorted to ground if internal current limiting is not used."
},
{
"number": "12",
"name": "OUTA",
"type": "output",
"description": "DMOS full-bridge output A driving the motor winding, with continuous output current rated at 1 A and peak 1.5 A (DC < 30%)."
},
{
"number": "13",
"name": "VCP",
"type": "passive",
"description": "Reservoir capacitor terminal; a 0.1 µF ceramic capacitor is required between VCP and VBB to supply the high-side DMOS gates."
},
{
"number": "14",
"name": "CP3",
"type": "passive",
"description": "Charge pump capacitor terminal 3; a 0.1 µF ceramic capacitor connects between CP3 and CP4 for pumping."
},
{
"number": "15",
"name": "CP1",
"type": "passive",
"description": "Charge pump capacitor terminal 1; a 0.1 µF ceramic capacitor connects between CP1 and CP2 for pumping."
},
{
"number": "16",
"name": "CP4",
"type": "passive",
"description": "Charge pump capacitor terminal 4; a 0.1 µF ceramic capacitor connects between CP3 and CP4 for pumping."
},
{
"number": "17",
"name": "PAD",
"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 is shown as '–' in the terminal list and as 'PAD' in the pin-out diagram, so; Pin types for the charge pump terminals (CP1-CP4) and VCP, and for SENSE, are inferred from their st; Pin-out diagram text on page 2 is garbled in extraction; pin numbers were taken from the TERMINAL LI",
"exposed pad 17 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint"
],
"pages_sent": 9,
"cost_usd": 0.0529,
"at": "2026-10-21T01:56:01"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588930927317684224",
"pages": 9,
"sha256": "3987b834a8bd9efc",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 17,
"described": 17,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "a3918sestr-t.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
3.0,
3.0,
0.785
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "3eb81ffac423a66cdcfead8efe56401da171edaf1f2257049aad7b2d3900f6c8",
"checked": "2026-10-21",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "a3918sestr-t-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
3.0,
3.0,
0.785
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "63242bbf7e5d6370df09761292afd861fd03ad28c731bee64271320c74065f3f",
"checked": "2026-10-21",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}