component
IS31FL3729-QFLS4-TR
Public Made by Adomby adom
ISSI Integrated Silicon Solution LED Drivers, QFN-32-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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{
"slug": "is31fl3729-qfls4-tr",
"version": "0.1.0",
"type": "component",
"description": "ISSI Integrated Silicon Solution LED Drivers, QFN-32-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"led drivers",
"is31fl3729-qfls4-tr",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
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"path": "docs/hero.png"
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"files": [
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"README.md",
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"is31fl3729-qfls4-tr.kicad_mod",
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"is31fl3729-qfls4-tr.step",
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"docs/is31fl3729-qfls4-tr-datasheet.pdf",
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"is31fl3729-qfls4-tr-hero.overlay.json",
"is31fl3729-qfls4-tr-etched.glb"
],
"component": {
"mpn": "IS31FL3729-QFLS4-TR",
"manufacturer": "ISSI Integrated Silicon Solution",
"package": "QFN-32-EP(4x4)",
"pin_count": 33,
"category": "LED Drivers",
"subcategory": "LED Drivers",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589836133233156096",
"parts": {
"symbol": "is31fl3729-qfls4-tr.kicad_sym",
"footprint": "is31fl3729-qfls4-tr.kicad_mod",
"model_3d": "is31fl3729-qfls4-tr-hero.glb",
"model_3d_plain": "is31fl3729-qfls4-tr-etched.glb",
"model_3d_step": "is31fl3729-qfls4-tr-etched.step",
"model_3d_step_plain": "is31fl3729-qfls4-tr.step",
"lbr": "is31fl3729-qfls4-tr.lbr"
},
"distributor_links": {
"lcsc": "C2940549",
"digikey": "2521-IS31FL3729-QFLS4-TR-ND",
"mouser": "870-IS31FL3729QFLS4T"
},
"distributor_check": {
"checked_at": "2026-10-17T08:41:35Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "2521-IS31FL3729-QFLS4-TR-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "870-IS31FL3729QFLS4T",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "CS4",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "2",
"name": "CS5",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "3",
"name": "CS6",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "4",
"name": "CS7",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "5",
"name": "CS8",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "6",
"name": "CS9",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "7",
"name": "CS10",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "8",
"name": "CS11",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "9",
"name": "GND",
"type": "power_in",
"description": "Ground; must be connected to the thermal pad and system ground."
},
{
"number": "10",
"name": "CS12",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "11",
"name": "CS13",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "12",
"name": "CS14",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "13",
"name": "CS15",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "14",
"name": "SW9/CS16",
"type": "power_out",
"description": "Switch power source SW9 for the matrix row, also functioning as current sink CS16; SWx carries the combined current of the CSy pins, so its trace must be much wider than a CSy trace."
},
{
"number": "15",
"name": "SW8",
"type": "power_out",
"description": "Switch power source for matrix row 8; SWx carries the combined current of the CSy pins, so its trace must be much wider than a CSy trace."
},
{
"number": "16",
"name": "SW7",
"type": "power_out",
"description": "Switch power source for matrix row 7; SWx carries the combined current of the CSy pins, so its trace must be much wider than a CSy trace."
},
{
"number": "17",
"name": "SW6",
"type": "power_out",
"description": "Switch power source for matrix row 6; SWx carries the combined current of the CSy pins, so its trace must be much wider than a CSy trace."
},
{
"number": "18",
"name": "SW5",
"type": "power_out",
"description": "Switch power source for matrix row 5; SWx carries the combined current of the CSy pins, so its trace must be much wider than a CSy trace."
},
{
"number": "19",
"name": "SW4",
"type": "power_out",
"description": "Switch power source for matrix row 4; SWx carries the combined current of the CSy pins, so its trace must be much wider than a CSy trace."
},
{
"number": "20",
"name": "SW3",
"type": "power_out",
"description": "Switch power source for matrix row 3; SWx carries the combined current of the CSy pins, so its trace must be much wider than a CSy trace."
},
{
"number": "21",
"name": "SW2",
"type": "power_out",
"description": "Switch power source for matrix row 2; SWx carries the combined current of the CSy pins, so its trace must be much wider than a CSy trace."
},
{
"number": "22",
"name": "SW1",
"type": "power_out",
"description": "Switch power source for matrix row 1; SWx carries the combined current of the CSy pins, so its trace must be much wider than a CSy trace."
},
{
"number": "23",
"name": "VCC",
"type": "power_in",
"description": "Power supply, 2.7 V to 5.5 V; place VCC capacitors close to this pin."
},
{
"number": "24",
"name": "GND",
"type": "power_in",
"description": "Ground; must be connected to the thermal pad and system ground."
},
{
"number": "25",
"name": "ISET",
"type": "passive",
"description": "Current setting pin; an external resistor RISET to GND sets the output current (example RISET=10kΩ), and it should be placed close to the chip."
},
{
"number": "26",
"name": "SDA",
"type": "bidirectional",
"description": "I2C serial data, open-collector with pull-up resistor (about 4.7kΩ at 400kHz, 2kΩ at 1MHz); logic 0 max 0.4 V or 0.6 V depending on LGC."
},
{
"number": "27",
"name": "SCL",
"type": "input",
"description": "I2C serial clock input, supporting up to 1MHz; logic-high threshold is 1.4 V or 2.4 V depending on LGC."
},
{
"number": "28",
"name": "AD",
"type": "input",
"description": "I2C address setting; tie to GND, SCL, SDA or VCC to select A2:A1 of the 7-bit slave address."
},
{
"number": "29",
"name": "SDB",
"type": "input",
"description": "Shutdown pin; pulling low places the chip in hardware shutdown, and a rising edge after VCC is above 2.4 V resets the I2C interface."
},
{
"number": "30",
"name": "CS1",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "31",
"name": "CS2",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"number": "32",
"name": "CS3",
"type": "output",
"description": "Current sink output for the LED matrix; maximum constant current is 35 mA per CSy at RISET=10kΩ."
},
{
"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 QFN-32 top-view figure text on page 3 is not positionally extractable, so the pin-to-name mappin; The QFN-32 exposed thermal pad is not given a pin number in the datasheet ('Thermal Pad Need to conn; Pin 14 is dual-function (SW9/CS16); it is typed power_out as a switch source. Pin types for CS, SW, ",
"exposed pad 33 added from the footprint"
],
"pages_sent": 24,
"cost_usd": 0.1131,
"at": "2026-10-17T08:41:17"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589836133233156096",
"pages": 24,
"sha256": "afd9a2c45d575a8c",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 33,
"described": 33,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4.0,
4.0,
0.6
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "7b482a511cdf2cf875c31931f9fea7f745b8dac2ea6203531cd6604f40a290cb",
"checked": "2026-10-17",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "is31fl3729-qfls4-tr-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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4.0,
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"footprint_binding": "identity",
"sha256": "4262ca4835cc3590f255b438be8ce03b7172279b9dc42f7dbb05d5a40f8abdf3",
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}
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}
}