component
A4984SETTR-T
Public Made by Adomby adom
Allegro MicroSystems, LLC Gate Drive ICs, QFN-32(5x5). 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": "a4984settr-t",
"title": "A4984SETTR-T",
"brief": "Allegro MicroSystems, LLC Gate Drive ICs, QFN-32(5x5). 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 management",
"a4984settr-t",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "A4984SETTR-T",
"manufacturer": "Allegro MicroSystems, LLC",
"package": "QFN-32(5x5)",
"pin_count": 33,
"category": "Power Management",
"subcategory": "Gate Drive ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/e183e23fbdd1138d7d4375881c5c76cb.pdf",
"parts": {
"symbol": "a4984settr-t.kicad_sym",
"footprint": "a4984settr-t.kicad_mod",
"model_3d": "a4984settr-t-hero.glb",
"model_3d_plain": "a4984settr-t-etched.glb",
"model_3d_step": "a4984settr-t-etched.step",
"model_3d_step_plain": "a4984settr-t.step",
"lbr": "a4984settr-t.lbr"
},
"distributor_links": {
"lcsc": "C459293",
"mouser": "250-A4984SETTR-T"
},
"distributor_check": {
"checked_at": "2026-10-28T23:56:25Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "deferred",
"error": "shared DigiKey quota guard: 988 calls left today"
},
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"pn": "250-A4984SETTR-T",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "OUT2B",
"type": "output",
"description": "DMOS full bridge 2 output B; motor output voltage is rated -2.0 to 37 V with output current up to ±2 A."
},
{
"number": "2",
"name": "NC",
"type": "unconnected",
"description": "No connection; in the ET package this pin separates critical output, sense and supply pins so that a pin-to-adjacent-pin short does not cause smoke or fire."
},
{
"number": "3",
"name": "VBB2",
"type": "power_in",
"description": "Load supply for full bridge 2; operating range is 8-35 V and 0-35 V during Sleep mode."
},
{
"number": "4",
"name": "NC",
"type": "unconnected",
"description": "No connection; no-connect pin placed between critical output, sense and supply pins for no-smoke-no-fire compliance."
},
{
"number": "5",
"name": "ENABLE",
"type": "input",
"description": "Active-low logic input that enables the FET outputs when low and disables them when high, while the translator inputs remain active; input high threshold is VDD × 0.7 minimum and low threshold is VDD × 0.3 maximum."
},
{
"number": "6",
"name": "GND",
"type": "power_in",
"description": "Ground pin; the GND pins must be tied together externally to the PAD ground plane under the device."
},
{
"number": "7",
"name": "CP1",
"type": "passive",
"description": "Charge pump capacitor terminal; a 0.1 µF ceramic capacitor is connected between CP1 and CP2."
},
{
"number": "8",
"name": "CP2",
"type": "passive",
"description": "Charge pump capacitor terminal; a 0.1 µF ceramic capacitor is connected between CP1 and CP2."
},
{
"number": "9",
"name": "VCP",
"type": "passive",
"description": "Charge pump reservoir capacitor terminal; a 0.1 µF ceramic capacitor is required between VCP and VBB, and an undervoltage on VCP disables the FET outputs."
},
{
"number": "10",
"name": "VREG",
"type": "power_out",
"description": "Internally generated regulator output with nominal 7 V, which must be decoupled with a 0.22 µF ceramic capacitor to ground."
},
{
"number": "11",
"name": "MS1",
"type": "input",
"description": "Microstep select logic input with a 100 kΩ internal pull-down that sets the step resolution together with MS2."
},
{
"number": "12",
"name": "MS2",
"type": "input",
"description": "Microstep select logic input with a 50 kΩ internal pull-down that sets the step resolution together with MS1."
},
{
"number": "13",
"name": "RESET",
"type": "input",
"description": "Active-low logic input that sets the translator to the Home state and turns off all FET outputs; STEP inputs are ignored until RESET is set high."
},
{
"number": "14",
"name": "ROSC",
"type": "input",
"description": "Timing set pin; tied to VDD or directly to GND sets a 30 µs off-time, while a resistor to ground sets tOFF ≈ ROSC/825 µs (tOFF in µs)."
},
{
"number": "15",
"name": "SLEEP",
"type": "input",
"description": "Active-low logic input; a logic low puts the device into Sleep mode (below 10 µA), and a 1 ms delay is required after leaving Sleep before issuing a STEP command."
},
{
"number": "16",
"name": "VDD",
"type": "power_in",
"description": "Logic supply with an operating range of 3.0-5.5 V."
},
{
"number": "17",
"name": "STEP",
"type": "input",
"description": "Step logic input; each low-to-high transition advances the motor one microstep, with minimum HIGH and LOW pulse widths of 1 µs."
},
{
"number": "18",
"name": "REF",
"type": "input",
"description": "Gm reference voltage input with an operating range of 0-4 V (absolute maximum 5.5 V), which sets the current trip level through ITripMAX = VREF/(8×RS)."
},
{
"number": "19",
"name": "GND",
"type": "power_in",
"description": "Ground pin; the GND pins must be tied together externally to the PAD ground plane under the device."
},
{
"number": "20",
"name": "DIR",
"type": "input",
"description": "Direction logic input; changes to this input do not take effect until the next STEP rising edge."
},
{
"number": "21",
"name": "NC",
"type": "unconnected",
"description": "No connection; no-connect pin placed between critical output, sense and supply pins for no-smoke-no-fire compliance."
},
{
"number": "22",
"name": "VBB1",
"type": "power_in",
"description": "Load supply for full bridge 1; operating range is 8-35 V and 0-35 V during Sleep mode."
},
{
"number": "23",
"name": "NC",
"type": "unconnected",
"description": "No connection; no-connect pin placed between critical output, sense and supply pins for no-smoke-no-fire compliance."
},
{
"number": "24",
"name": "OUT1B",
"type": "output",
"description": "DMOS full bridge 1 output B; motor output voltage is rated -2.0 to 37 V with output current up to ±2 A."
},
{
"number": "25",
"name": "SENSE1",
"type": "passive",
"description": "Sense resistor terminal for bridge 1; the SENSE1 voltage must not exceed the -0.5 V to 0.5 V absolute maximum rating."
},
{
"number": "26",
"name": "NC",
"type": "unconnected",
"description": "No connection; no-connect pin placed between critical output, sense and supply pins for no-smoke-no-fire compliance."
},
{
"number": "27",
"name": "OUT1A",
"type": "output",
"description": "DMOS full bridge 1 output A; motor output voltage is rated -2.0 to 37 V with output current up to ±2 A."
},
{
"number": "28",
"name": "NC",
"type": "unconnected",
"description": "No connection; no-connect pin placed between critical output, sense and supply pins for no-smoke-no-fire compliance."
},
{
"number": "29",
"name": "NC",
"type": "unconnected",
"description": "No connection; no-connect pin placed between critical output, sense and supply pins for no-smoke-no-fire compliance."
},
{
"number": "30",
"name": "OUT2A",
"type": "output",
"description": "DMOS full bridge 2 output A; motor output voltage is rated -2.0 to 37 V with output current up to ±2 A."
},
{
"number": "31",
"name": "NC",
"type": "unconnected",
"description": "No connection; no-connect pin placed between critical output, sense and supply pins for no-smoke-no-fire compliance."
},
{
"number": "32",
"name": "SENSE2",
"type": "passive",
"description": "Sense resistor terminal for bridge 2; the SENSE2 voltage must not exceed the -0.5 V to 0.5 V absolute maximum rating."
},
{
"number": "33",
"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 (listed as PAD in the terminal table) has no numbered pin on the package, so; The A4984SETTR-T is listed on the selection guide (page 2) as the 32-pin QFN with exposed thermal pa; The VREG pin type was set to power_out because the datasheet describes it as an internally generated",
"exposed pad 33 added from the footprint"
],
"pages_sent": 22,
"cost_usd": 0.1097,
"at": "2026-10-28T23:56:07"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/e183e23fbdd1138d7d4375881c5c76cb.pdf",
"pages": 22,
"sha256": "62200312e9097918",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 33,
"described": 33,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
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"footprint": "viewers/footprint.html"
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"centre_offset_mm": 0,
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},
{
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},
"metadata": {
"specs": {
"Manufacturer": "Allegro MicroSystems, LLC",
"Package": "QFN-32(5x5)",
"Category": "Power Management",
"Pins": "33"
},
"appearance": {
"contacts": {
"quote": "for enhanced thermal dissipation and are lead (Pb) free (suffix –T), with 100% matte tin plated leadframes.",
"page": 2,
"doc": "ds.pdf",
"plating": "tin"
},
"version": 1,
"datasheet_sha256": "62200312e90979186884cc2b84447fa7d9a6c51709aaca7d4b7448ee1e736991"
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"rows": [
{
"name": "Load Supply Voltage Range (Operating)",
"symbol": "VBB",
"kind": "recommended_operating",
"unit": "V",
"min": 8,
"typ": null,
"max": 35,
"conditions": "Operating",
"source_page": 4,
"source": "datasheet"
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{
"name": "Load Supply Voltage Range (During Sleep Mode)",
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"unit": "V",
"min": 0,
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"max": 35,
"conditions": "During Sleep Mode",
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{
"name": "Logic Supply Voltage Range",
"symbol": "VDD",
"kind": "recommended_operating",
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"min": 3,
"typ": null,
"max": 5.5,
"conditions": "Operating",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Output On Resistance (Source Driver)",
"symbol": "RDSON",
"kind": "electrical",
"unit": "mΩ",
"min": null,
"typ": 320,
"max": 430,
"conditions": "Source Driver, IOUT = –1.5 A",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Output On Resistance (Sink Driver)",
"symbol": "RDSON",
"kind": "electrical",
"unit": "mΩ",
"min": null,
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"conditions": "Sink Driver, IOUT = 1.5 A",
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"source": "datasheet"
},
{
"name": "Body Diode Forward Voltage (Source Diode)",
"symbol": "VF",
"kind": "electrical",
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"min": null,
"typ": null,
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"conditions": "Source Diode, IF = –1.5 A",
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},
{
"name": "Body Diode Forward Voltage (Sink Diode)",
"symbol": "VF",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 1.3,
"conditions": "Sink Diode, IF = 1.5 A",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Motor Supply Current",
"symbol": "IBB",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 4,
"conditions": "fPWM < 50 kHz",
"source_page": 4,
"source": "datasheet"
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{
"name": "Motor Supply Current (Operating, outputs disabled)",
"symbol": "IBB",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 2,
"conditions": "Operating, outputs disabled",
"source_page": 4,
"source": "datasheet"
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{
"name": "Motor Supply Current (Sleep Mode)",
"symbol": "IBB",
"kind": "electrical",
"unit": "μA",
"min": null,
"typ": null,
"max": 10,
"conditions": "Sleep Mode",
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{
"name": "Logic Supply Current",
"symbol": "IDD",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 8,
"conditions": "fPWM < 50 kHz",
"source_page": 4,
"source": "datasheet"
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{
"name": "Logic Supply Current (Outputs off)",
"symbol": "IDD",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": null,
"max": 5,
"conditions": "Outputs off",
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"source": "datasheet"
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{
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"kind": "electrical",
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"typ": null,
"max": 10,
"conditions": "Sleep Mode",
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"source": "datasheet"
},
{
"name": "Logic Input Current (high)",
"symbol": "IIN(1)",
"kind": "electrical",
"unit": "µA",
"min": -20,
"typ": null,
"max": 20,
"conditions": "VIN = VDD × 0.7",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Logic Input Current (low)",
"symbol": "IIN(0)",
"kind": "electrical",
"unit": "µA",
"min": -20,
"typ": null,
"max": 20,
"conditions": "VIN = VDD × 0.3",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Logic Input Hysteresis",
"symbol": "VHYS(IN)",
"kind": "electrical",
"unit": "%",
"min": 5,
"typ": 11,
"max": 19,
"conditions": "As a % of VDD",
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"source": "datasheet"
},
{
"name": "Blank Time",
"symbol": "tBLANK",
"kind": "timing",
"unit": "μs",
"min": 0.7,
"typ": 1,
"max": 1.3,
"conditions": "",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Fixed Off-Time",
"symbol": "tOFF",
"kind": "timing",
"unit": "μs",
"min": 20,
"typ": 30,
"max": 40,
"conditions": "OSC = VDD or GND",
"source_page": 4,
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},
{
"name": "Fixed Off-Time",
"symbol": "tOFF",
"kind": "timing",
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"min": 23,
"typ": 30,
"max": 37,
"conditions": "ROSC = 25 kΩ",
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{
"name": "Reference Input Voltage Range",
"symbol": "VREF",
"kind": "recommended_operating",
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"min": 0,
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{
"name": "Reference Input Current",
"symbol": "IREF",
"kind": "electrical",
"unit": "µA",
"min": -3,
"typ": 0,
"max": 3,
"conditions": "",
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},
{
"name": "Current Trip-Level Error",
"symbol": "errI",
"kind": "tolerance",
"unit": "%",
"min": -15,
"typ": null,
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"conditions": "VREF = 2 V, %ITripMAX = 38.27%",
"source_page": 4,
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{
"name": "Current Trip-Level Error",
"symbol": "errI",
"kind": "tolerance",
"unit": "%",
"min": -5,
"typ": null,
"max": 5,
"conditions": "VREF = 2 V, %ITripMAX = 70.71%",
"source_page": 4,
"source": "datasheet"
},
{
"name": "Crossover Dead Time",
"symbol": "tDT",
"kind": "timing",
"unit": "ns",
"min": 100,
"typ": 475,
"max": 800,
"conditions": "",
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{
"name": "Overcurrent Protection Threshold",
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"unit": "A",
"min": 2.1,
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"max": null,
"conditions": "",
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},
{
"name": "VDD Undervoltage Lockout",
"symbol": "VDDUVLO",
"kind": "electrical",
"unit": "V",
"min": 2.7,
"typ": 2.8,
"max": 2.9,
"conditions": "VDD rising",
"source_page": 4,
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{
"name": "Load Supply Voltage",
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"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 35,
"conditions": "",
"source_page": 2,
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},
{
"name": "Output Current",
"symbol": "IOUT",
"kind": "absolute_maximum",
"unit": "A",
"min": -2,
"typ": null,
"max": 2,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Logic Input Voltage",
"symbol": "VIN",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 5.5,
"conditions": "",
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"source": "datasheet"
},
{
"name": "Logic Supply Voltage",
"symbol": "VDD",
"kind": "absolute_maximum",
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"min": -0.3,
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"conditions": "",
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"source": "datasheet"
},
{
"name": "Motor Outputs Voltage",
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"kind": "absolute_maximum",
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"min": -2,
"typ": null,
"max": 37,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Sense Voltage",
"symbol": "VSENSE",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.5,
"typ": null,
"max": 0.5,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
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