component
A5977GLPTR-T
Public Made by Adomby adom
Allegro MicroSystems, LLC Motor Driver ICs, HTSSOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "a5977glptr-t",
"version": "0.1.0",
"type": "component",
"description": "Allegro MicroSystems, LLC Motor Driver ICs, HTSSOP-28. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"power management ics",
"a5977glptr-t",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"a5977glptr-t.kicad_sym",
"a5977glptr-t.kicad_mod",
"a5977glptr-t.glb",
"a5977glptr-t.step",
"a5977glptr-t.lbr",
"docs/hero.png",
"docs/a5977glptr-t-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"a5977glptr-t-hero.glb",
"a5977glptr-t-hero.overlay.json",
"a5977glptr-t-etched.glb"
],
"component": {
"mpn": "A5977GLPTR-T",
"manufacturer": "Allegro MicroSystems, LLC",
"package": "HTSSOP-28",
"pin_count": 29,
"category": "Power Management ICs",
"subcategory": "Motor Driver ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/fa246f25a49941769fb356f6221378d4.pdf",
"parts": {
"symbol": "a5977glptr-t.kicad_sym",
"footprint": "a5977glptr-t.kicad_mod",
"model_3d": "a5977glptr-t-hero.glb",
"model_3d_plain": "a5977glptr-t-etched.glb",
"model_3d_step": "a5977glptr-t-etched.step",
"model_3d_step_plain": "a5977glptr-t.step",
"lbr": "a5977glptr-t.lbr"
},
"distributor_links": {
"lcsc": "C163277",
"digikey": "620-1784-2-ND",
"mouser": "250-A5977GLPTR-T"
},
"distributor_check": {
"checked_at": "2026-10-23T09:11:35Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "620-1784-2-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "250-A5977GLPTR-T",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "SENSE1",
"type": "passive",
"description": "Sense resistor connection for bridge 1; SENSE voltage must not exceed 0.5 V."
},
{
"number": "2",
"name": "HOMEn",
"type": "output",
"description": "Logic output that is low when the translator is in the home state and high otherwise."
},
{
"number": "3",
"name": "DIR",
"type": "input",
"description": "Logic input that determines the direction of motor rotation."
},
{
"number": "4",
"name": "OUT1A",
"type": "output",
"description": "DMOS full-bridge 1 output A, rated for 40 V and ±2.8 A."
},
{
"number": "5",
"name": "PFD",
"type": "input",
"description": "Analog input for mixed-decay setting: above 0.6×VDD gives slow decay, below 0.21×VDD gives fast decay, between gives mixed decay; decouple with 0.1 µF."
},
{
"number": "6",
"name": "RC1",
"type": "passive",
"description": "Analog input for fixed off-time and blanking of bridge 1, set by an external RT and CT to ground."
},
{
"number": "7",
"name": "AGND",
"type": "power_in",
"description": "Analog ground; must be connected together with PGND and the thermal pad externally under the device."
},
{
"number": "8",
"name": "REF",
"type": "input",
"description": "Gm reference input voltage that sets ITRIPmax = VREF/(8×RS), range 0 to VDD."
},
{
"number": "9",
"name": "RC2",
"type": "passive",
"description": "Analog input for fixed off-time and blanking of bridge 2, set by an external RT and CT to ground."
},
{
"number": "10",
"name": "VDD",
"type": "power_in",
"description": "Logic supply voltage, 3 to 5.5 V operating range."
},
{
"number": "11",
"name": "OUT2A",
"type": "output",
"description": "DMOS full-bridge 2 output A, rated for 40 V and ±2.8 A."
},
{
"number": "12",
"name": "MS2",
"type": "input",
"description": "Logic input that with MS1 selects the microstep resolution (full to eighth step)."
},
{
"number": "13",
"name": "MS1",
"type": "input",
"description": "Logic input that with MS2 selects the microstep resolution (full to eighth step)."
},
{
"number": "14",
"name": "SENSE2",
"type": "passive",
"description": "Sense resistor connection for bridge 2; SENSE voltage must not exceed 0.5 V."
},
{
"number": "15",
"name": "VBB2",
"type": "power_in",
"description": "Load supply for bridge 2, 8 to 40 V operating."
},
{
"number": "16",
"name": "SR",
"type": "input",
"description": "Logic input where low enables synchronous rectification and high disables it."
},
{
"number": "17",
"name": "RESETn",
"type": "input",
"description": "Active-low input that sets the translator to the home state and turns off all DMOS outputs."
},
{
"number": "18",
"name": "OUT2B",
"type": "output",
"description": "DMOS full-bridge 2 output B, rated for 40 V and ±2.8 A."
},
{
"number": "19",
"name": "STEP",
"type": "input",
"description": "Logic input where each low-to-high transition advances the motor one increment."
},
{
"number": "20",
"name": "VREG",
"type": "passive",
"description": "Internally generated regulator for sink-side gate drive; decouple with 0.22 µF to ground."
},
{
"number": "21",
"name": "PGND",
"type": "power_in",
"description": "Power ground; must be connected together with AGND and the thermal pad externally under the device."
},
{
"number": "22",
"name": "VCP",
"type": "passive",
"description": "Charge pump reservoir capacitor; 0.22 µF ceramic required between VCP and VBB."
},
{
"number": "23",
"name": "CP1",
"type": "passive",
"description": "Charge pump capacitor terminal; 0.22 µF ceramic required between CP1 and CP2."
},
{
"number": "24",
"name": "CP2",
"type": "passive",
"description": "Charge pump capacitor terminal; 0.22 µF ceramic required between CP1 and CP2."
},
{
"number": "25",
"name": "OUT1B",
"type": "output",
"description": "DMOS full-bridge 1 output B, rated for 40 V and ±2.8 A."
},
{
"number": "26",
"name": "ENABLEn",
"type": "input",
"description": "Active-low input that enables all DMOS outputs; outputs are disabled when high."
},
{
"number": "27",
"name": "SLEEPn",
"type": "input",
"description": "Active-low input for minimum power sleep mode; a rising edge resets the translator to home and 1 ms is needed before STEP."
},
{
"number": "28",
"name": "VBB1",
"type": "power_in",
"description": "Load supply for bridge 1, 8 to 40 V operating."
},
{
"number": "29",
"name": "PAD",
"type": "power_in",
"description": "Exposed thermal pad (required); must be connected together with AGND and PGND externally under the device."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-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 lists the thermal pad as '–' with no pin number. I assigned it number 29 as a conventi; The datasheet gives no electrical type for the pins. I inferred types from the descriptions. The sen",
"1/29 pins cited to the wrong page (name found elsewhere): ['29:PAD@p3']"
],
"pages_sent": 16,
"cost_usd": 0.1426,
"at": "2026-10-23T09:11:23"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/fa246f25a49941769fb356f6221378d4.pdf",
"pages": 16,
"sha256": "37ec9fde01dc585e",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 29,
"described": 29,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
7.2,
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],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "ff242f1d3be9d09e7f929707a2c5b1ee974a4f882053b04bcdb1cd2cb21223ef",
"checked": "2026-10-23",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "a5977glptr-t-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "7d48e5d6795ddf3882ed70b23da62d7d958920d8c84387c77212fdfcf4f28491",
"checked": "2026-10-23",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}