component
A3916GESTR-T-1
Public Made by Adomby adom
Allegro MicroSystems LLC Stepper Motor Driver, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "a3916gestr-t-1",
"version": "0.1.0",
"type": "component",
"description": "Allegro MicroSystems LLC Stepper Motor Driver, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"motor driver ics",
"a3916gestr-t-1",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"a3916gestr-t-1.kicad_sym",
"a3916gestr-t-1.kicad_mod",
"a3916gestr-t-1.glb",
"a3916gestr-t-1.step",
"a3916gestr-t-1.lbr",
"docs/hero.png",
"docs/a3916gestr-t-1-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"a3916gestr-t-1-hero.glb",
"a3916gestr-t-1-hero.overlay.json",
"a3916gestr-t-1-etched.glb"
],
"component": {
"mpn": "A3916GESTR-T-1",
"manufacturer": "Allegro MicroSystems LLC",
"package": "QFN-20-EP(4x4)",
"pin_count": 21,
"category": "Motor Driver ICs",
"subcategory": "Stepper Motor Driver",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893307762053120",
"parts": {
"symbol": "a3916gestr-t-1.kicad_sym",
"footprint": "a3916gestr-t-1.kicad_mod",
"model_3d": "a3916gestr-t-1-hero.glb",
"model_3d_plain": "a3916gestr-t-1-etched.glb",
"model_3d_step": "a3916gestr-t-1-etched.step",
"model_3d_step_plain": "a3916gestr-t-1.step",
"lbr": "a3916gestr-t-1.lbr"
},
"distributor_links": {
"lcsc": "C156195"
},
"distributor_check": {
"checked_at": "2026-10-17T16:14:40Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "quota"
},
"mouser": {
"pn": null,
"status": "quota"
}
},
"pins": [
{
"number": "1",
"name": "NC",
"type": "unconnected",
"description": "No internal connection on the 20-contact ES,-1 package."
},
{
"number": "2",
"name": "GND",
"type": "power_in",
"description": "Ground terminal for the device, serving as the ground reference for the A3916."
},
{
"number": "3",
"name": "SLEEPn",
"type": "input",
"description": "Active-low sleep input where a logic high allows normal operation, with VIN(1) of at least 2.0 V and VIN(0) of at most 0.4 V, and the device needs 1.5 ms after leaving sleep before a command is issued."
},
{
"number": "4",
"name": "IN1",
"type": "input",
"description": "Bridge 1 control input with VIN(1) of at least 2.0 V, VIN(0) of at most 0.8 V, and a logic input voltage range of -0.3 to 5.5 V."
},
{
"number": "5",
"name": "IN2",
"type": "input",
"description": "Bridge 1 control input with VIN(1) of at least 2.0 V, VIN(0) of at most 0.8 V, and a logic input voltage range of -0.3 to 5.5 V."
},
{
"number": "6",
"name": "IN3",
"type": "input",
"description": "Bridge 2 control input with VIN(1) of at least 2.0 V, VIN(0) of at most 0.8 V, and a logic input voltage range of -0.3 to 5.5 V."
},
{
"number": "7",
"name": "IN4",
"type": "input",
"description": "Bridge 2 control input with VIN(1) of at least 2.0 V, VIN(0) of at most 0.8 V, and a logic input voltage range of -0.3 to 5.5 V."
},
{
"number": "8",
"name": "FAULTn",
"type": "output",
"description": "Open-drain fault output pulled low during a thermal shutdown or overcurrent protection event, with VFAULTn of at most 200 mV at 1 mA when asserted."
},
{
"number": "9",
"name": "NC",
"type": "unconnected",
"description": "No internal connection on the 20-contact ES,-1 package."
},
{
"number": "10",
"name": "OUT2A",
"type": "output",
"description": "DMOS H-bridge 2, output A, driving the bridge 2 motor winding."
},
{
"number": "11",
"name": "SENSE2",
"type": "passive",
"description": "Sense resistor terminal for bridge 2; the SENSEx rating is 0.5 V continuous and 2.5 V pulsed for under 1 µs, and tying it to ground disables internal current limiting."
},
{
"number": "12",
"name": "OUT2B",
"type": "output",
"description": "DMOS H-bridge 2, output B, driving the bridge 2 motor winding."
},
{
"number": "13",
"name": "VBB",
"type": "power_in",
"description": "Motor supply voltage with an operating range of 2.7 to 15 V and an absolute maximum of 15 V."
},
{
"number": "14",
"name": "OUT1B",
"type": "output",
"description": "DMOS H-bridge 1, output B, driving the bridge 1 motor winding."
},
{
"number": "15",
"name": "SENSE1",
"type": "passive",
"description": "Sense resistor terminal for bridge 1; the SENSEx rating is 0.5 V continuous and 2.5 V pulsed for under 1 µs, and tying it to ground disables internal current limiting."
},
{
"number": "16",
"name": "OUT1A",
"type": "output",
"description": "DMOS H-bridge 1, output A, driving the bridge 1 motor winding."
},
{
"number": "17",
"name": "VCP",
"type": "passive",
"description": "Charge pump capacitor connection, which the application circuit shows with a 0.1 µF capacitor."
},
{
"number": "18",
"name": "NC",
"type": "unconnected",
"description": "No internal connection on the 20-contact ES,-1 package."
},
{
"number": "19",
"name": "NC",
"type": "unconnected",
"description": "No internal connection on the 20-contact ES,-1 package."
},
{
"number": "20",
"name": "NC",
"type": "unconnected",
"description": "No internal connection on the 20-contact ES,-1 package."
},
{
"number": "21",
"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 pad has no printed number in the terminal list (shown as '–'), so it is listed as 'PAD'.; The 20-contact pin diagram text on page 3 is scrambled in extraction. The pin-to-name mapping here c; The datasheet gives no electrical-type classification for SENSEx or VCP beyond their function; they ",
"exposed pad 21 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint"
],
"pages_sent": 11,
"cost_usd": 0.0643,
"at": "2026-10-17T16:13:22"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893307762053120",
"pages": 11,
"sha256": "50e67b813f034161",
"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": [
{
"file": "a3916gestr-t-1.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4.0,
4.0,
0.77
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
"checked": "2026-10-17",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "a3916gestr-t-1-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4.0,
4.0,
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],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "331e67cc44e1775ec8efdaf1ea842b37189aab28561ba5de44589d9b3de77667",
"checked": "2026-10-17",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}