component
L6474HTR
Public Made by Adomby adom
STMicroelectronics Motor Driver ICs, HTSSOP-28-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"title": "L6474HTR",
"brief": "STMicroelectronics Motor Driver ICs, HTSSOP-28-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
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"mpn": "L6474HTR",
"manufacturer": "STMicroelectronics",
"package": "HTSSOP-28-EP",
"pin_count": 29,
"category": "Power Management ICs",
"subcategory": "Motor Driver ICs",
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"lcsc": "C2150658",
"digikey": "497-12828-2-ND",
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"pins": [
{
"number": "1",
"name": "OUT1A",
"type": "output",
"description": "Full bridge A output 1."
},
{
"number": "2",
"name": "VSA",
"type": "power_in",
"description": "Full bridge A power supply pin; it must be connected to VSB."
},
{
"number": "3",
"name": "STBY\\RST",
"type": "input",
"description": "Standby and reset pin: LOW logic level resets the logic and puts the device into standby mode; if not used, it should be connected to VDD."
},
{
"number": "4",
"name": "DIR",
"type": "input",
"description": "Direction input."
},
{
"number": "5",
"name": "ADCIN",
"type": "input",
"description": "Internal analog to digital converter input."
},
{
"number": "6",
"name": "VREG",
"type": "power_out",
"description": "Internal 3 V voltage regulator output and 3.3 V external logic supply."
},
{
"number": "7",
"name": "OSCIN",
"type": "input",
"description": "Oscillator pin 1: connects an external oscillator or clock source; if unused, it should be left floating."
},
{
"number": "8",
"name": "OSCOUT",
"type": "output",
"description": "Oscillator pin 2: connects an external oscillator; when the internal oscillator is used this pin can supply 2/4/8/16 MHz, and if unused it should be left floating."
},
{
"number": "9",
"name": "AGND",
"type": "power_in",
"description": "Analog ground."
},
{
"number": "10",
"name": "CP",
"type": "output",
"description": "Charge pump oscillator output."
},
{
"number": "11",
"name": "VBOOT",
"type": "power_in",
"description": "Bootstrap voltage needed for driving the high-side power DMOS of both bridges (A and B)."
},
{
"number": "12",
"name": "VSB",
"type": "power_in",
"description": "Full bridge B power supply pin; it must be connected to VSA."
},
{
"number": "13",
"name": "PGND",
"type": "power_in",
"description": "Power ground pin."
},
{
"number": "14",
"name": "OUT1B",
"type": "output",
"description": "Full bridge B output 1."
},
{
"number": "15",
"name": "OUT2B",
"type": "output",
"description": "Full bridge B output 2."
},
{
"number": "16",
"name": "VSB",
"type": "power_in",
"description": "Full bridge B power supply pin; it must be connected to VSA."
},
{
"number": "17",
"name": "VDD",
"type": "power_in",
"description": "Logic outputs supply voltage (pull-up reference)."
},
{
"number": "18",
"name": "SDO",
"type": "output",
"description": "Data output pin for serial interface."
},
{
"number": "19",
"name": "CK",
"type": "input",
"description": "Serial interface clock."
},
{
"number": "20",
"name": "SDI",
"type": "input",
"description": "Data input pin for serial interface."
},
{
"number": "21",
"name": "DGND",
"type": "power_in",
"description": "Digital ground."
},
{
"number": "22",
"name": "SYNC",
"type": "output",
"description": "Synchronization signal, open drain output."
},
{
"number": "23",
"name": "CS",
"type": "input",
"description": "Chip select input pin for serial interface."
},
{
"number": "24",
"name": "FLAG",
"type": "output",
"description": "Status flag pin: an internal open drain transistor can pull the pin to GND when a programmed alarm condition occurs (step loss, OCD, thermal pre-warning or shutdown, UVLO, wrong command, non performable command)."
},
{
"number": "25",
"name": "STCK",
"type": "input",
"description": "Step clock input."
},
{
"number": "26",
"name": "VSA",
"type": "power_in",
"description": "Full bridge A power supply pin; it must be connected to VSB."
},
{
"number": "27",
"name": "PGND",
"type": "power_in",
"description": "Power ground pin."
},
{
"number": "28",
"name": "OUT2A",
"type": "output",
"description": "Full bridge A output 2."
},
{
"number": "29",
"name": "EP",
"type": "passive",
"description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
}
],
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"primary_model": "claude-haiku-5-5",
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"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The HTSSOP28 pin numbers come from the HTSSOP column of Table 6 (Pin description), because the Figur"
],
"pages_sent": 23,
"cost_usd": 0.0327,
"at": "2026-11-02T17:29:34"
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"Package": "HTSSOP-28-EP",
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"conditions": "VSA = VSB = VS",
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{
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{
"name": "VS UVLO turn-on threshold",
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{
"name": "VS UVLO threshold hysteresis",
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"min": 0.7,
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{
"name": "Quiescent motor supply current",
"symbol": "Iq",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.5,
"max": 0.65,
"conditions": "Internal oscillator selected; VREG = 3.3 V ext; CP floating",
"source_page": 10,
"source": "datasheet"
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{
"name": "Minimum charge pump oscillator frequency",
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"min": 660,
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{
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"typ": null,
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{
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"min": null,
"typ": null,
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"source": "datasheet"
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{
"name": "High logic level input voltage",
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"min": 2,
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{
"name": "Low logic level output voltage",
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"conditions": "VDD = 3.3 V, IOL = 4 mA",
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{
"name": "High logic level output voltage",
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"conditions": "VDD = 3.3 V, IOH = 4 mA",
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{
"name": "High logic level output voltage",
"symbol": "VOH",
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"min": 4.7,
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"conditions": "VDD = 5 V, IOH = 4 mA",
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{
"name": "CS pull-up and STBY pull-down resistors",
"symbol": "RPU",
"kind": "electrical",
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"min": 335,
"typ": 430,
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"conditions": "CS = GND; STBY/RST = 5 V",
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{
"name": "DIR input pull-up resistance",
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"min": 60,
"typ": 85,
"max": 110,
"conditions": "DIR = GND",
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{
"name": "Internal oscillator frequency tolerance",
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"kind": "tolerance",
"unit": "%",
"min": -3,
"typ": null,
"max": 3,
"conditions": "Tj = 25 °C, VREG = 3.3 V",
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{
"name": "Programmable external oscillator frequency",
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"unit": "MHz",
"min": 8,
"typ": null,
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{
"name": "OSCOUT clock source high level voltage",
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"kind": "electrical",
"unit": "V",
"min": 2.4,
"typ": null,
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"conditions": "Internal oscillator 3.3 V VREG externally supplied; IOSCOUT = 4 mA",
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},
{
"name": "OSCOUT clock source low level voltage",
"symbol": "VOSCOUTL",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.3,
"conditions": "Internal oscillator 3.3 V VREG externally supplied; IOSCOUT = 4 mA",
"source_page": 12,
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{
"name": "Step clock input frequency",
"symbol": "fSTCK",
"kind": "electrical",
"unit": "MHz",
"min": null,
"typ": null,
"max": 2,
"conditions": "",
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{
"name": "Maximum SPI clock frequency",
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"kind": "electrical",
"unit": "MHz",
"min": null,
"typ": null,
"max": 5,
"conditions": "",
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{
"name": "Chip select setup time",
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"min": 350,
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{
"name": "Chip select hold time",
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"min": 10,
"typ": null,
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{
"name": "Deselect time",
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"min": 800,
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{
"name": "Data input setup time",
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{
"name": "Data input hold time",
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"min": 20,
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{
"name": "Data output enable time",
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{
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