component
M41ST85WMX6TR
Public Made by Adomby adom
STMicroelectronics Real Time Clocks, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "m41st85wmx6tr",
"title": "M41ST85WMX6TR",
"brief": "STMicroelectronics Real Time Clocks, SOIC-28-300mil. 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",
"clock-timing",
"m41st85wmx6tr",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "M41ST85WMX6TR",
"manufacturer": "STMicroelectronics",
"package": "SOIC-28-300mil",
"pin_count": 28,
"category": "Clock/Timing",
"subcategory": "Real Time Clocks",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589040739070185472",
"parts": {
"symbol": "m41st85wmx6tr.kicad_sym",
"footprint": "m41st85wmx6tr.kicad_mod",
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"model_3d_plain": "m41st85wmx6tr.glb",
"model_3d_step": "m41st85wmx6tr-etched.step",
"model_3d_step_plain": "m41st85wmx6tr.step",
"lbr": "m41st85wmx6tr.lbr"
},
"distributor_links": {
"lcsc": "C2651507",
"digikey": "497-13794-2-ND",
"mouser": "511-M41ST85WMX6TR"
},
"distributor_check": {
"checked_at": "2026-10-08T03:06:13Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "497-13794-2-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "511-M41ST85WMX6TR",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "NF",
"type": "passive",
"description": "No function pin that should be tied to VSS and is internally shorted to pins 2, 3 and 4."
},
{
"number": "2",
"name": "NF",
"type": "passive",
"description": "No function pin that should be tied to VSS and is internally shorted to pins 1, 3 and 4."
},
{
"number": "3",
"name": "NF",
"type": "passive",
"description": "No function pin that should be tied to VSS and is internally shorted to pins 1, 2 and 4."
},
{
"number": "4",
"name": "NF",
"type": "passive",
"description": "No function pin that should be tied to VSS and is internally shorted to pins 1, 2 and 3."
},
{
"number": "5",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "6",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "7",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "8",
"name": "SQW",
"type": "output",
"description": "Programmable square wave output from 1 Hz to 32.768 kHz, enabled by the SQWE bit; CMOS output with VOH 2.4 V min at IOH = -1.0 mA."
},
{
"number": "9",
"name": "WDI",
"type": "input",
"description": "Watchdog input that resets the watchdog timer on a high-to-low or low-to-high transition; internally pulled down to VSS through 100 kΩ and tied to VSS if unused."
},
{
"number": "10",
"name": "RSTIN1",
"type": "input",
"description": "Active-low reset input 1 that generates an output reset on RST; internally pulled up to VCC through 100 kΩ, pulses shorter than 50 ns are ignored."
},
{
"number": "11",
"name": "RSTIN2",
"type": "input",
"description": "Active-low reset input 2 that generates an output reset on RST; internally pulled up to VCC through 100 kΩ, pulses shorter than 20 ms are ignored."
},
{
"number": "12",
"name": "PFO",
"type": "output",
"description": "Power-fail output that goes low when PFI is below the 1.25 V threshold and during battery backup; left unconnected if unused."
},
{
"number": "13",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "14",
"name": "VSS",
"type": "power_in",
"description": "Ground."
},
{
"number": "15",
"name": "VBAT",
"type": "power_in",
"description": "Backup battery supply input, 2.5 to 3.5 V (3.0 V typ), for the embedded-crystal SOIC only."
},
{
"number": "16",
"name": "ECON",
"type": "output",
"description": "Conditioned chip enable output that write-protects external LPSRAM by going high (within 0.2 V of VBAT) when VCC is out of tolerance."
},
{
"number": "17",
"name": "SDA",
"type": "bidirectional",
"description": "I2C serial data input/output, requiring a pull-up resistor to a positive supply."
},
{
"number": "18",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "19",
"name": "RST",
"type": "output",
"description": "Active-low open-drain reset output driven by power-fail detect, RSTIN1/RSTIN2 and watchdog; needs a pull-up resistor, up to 3.6 V."
},
{
"number": "20",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "21",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "22",
"name": "SCL",
"type": "input",
"description": "I2C serial clock input, up to 400 kHz, requiring a pull-up resistor to a positive supply."
},
{
"number": "23",
"name": "PFI",
"type": "input",
"description": "Power-fail input compared to the 1.25 V internal reference (threshold 1.225 to 1.275 V); connected to VSS if unused."
},
{
"number": "24",
"name": "NC",
"type": "unconnected",
"description": "No connect."
},
{
"number": "25",
"name": "VOUT",
"type": "power_out",
"description": "Supply output to external SRAM, supplying up to 100 mA from VCC or 100 µA in battery backup."
},
{
"number": "26",
"name": "IRQ/FT/OUT",
"type": "output",
"description": "Open-drain interrupt, frequency test (512 Hz) and output-driver pin for alarm and watchdog; needs a pull-up resistor (500 Ω to 10 kΩ recommended), VOL 0.4 V at 10 mA."
},
{
"number": "27",
"name": "EX",
"type": "input",
"description": "External chip enable input, propagated to ECON with a 15 ns max delay."
},
{
"number": "28",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, 2.7 to 3.6 V (absolute maximum 4.6 V)."
}
],
"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+vision",
"consensus_model": "claude-opus-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Pin types for NF (tied to VSS per note) and NC pins chosen by judgment; datasheet gives no electrica; The datasheet's Figure 3 (28-pin 300 mil SOIC) is used for SOX28 since it is the only variant with V",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 43,
"cost_usd": 0.9913,
"at": "2026-10-08T03:05:54"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589040739070185472",
"pages": 43,
"sha256": "3cc1487654fb8698",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 28,
"described": 28,
"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",
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"seat": "z = 0",
"extents_mm": [
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17.9,
2.75
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "b889a13dbe9ec59e79fa9f1b5118b00bfa54f9582392335ff3365b64afc264b1",
"checked": "2026-10-08",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "m41st85wmx6tr-etched.step",
"role": "eda",
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"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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"zmin_mm": 0,
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"footprint_binding": "identity",
"sha256": "64e3e45eaebc809391b82137f5dc249632de6c9c8f6cfc4b810280b25ba91490",
"checked": "2026-10-08",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "STMicroelectronics",
"Package": "SOIC-28-300mil",
"Category": "Clock/Timing",
"Pins": "28"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"m41st85wmx6tr"
],
"discovery_pitch": "M41ST85WMX6TR (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
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"files": [
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"visibility": {
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}