component
AB1815-T3
Public Made by Adomby adom
Abracon LLC Real-time Clocks (RTC), QFN-16(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249
{
"slug": "ab1815-t3",
"version": "0.1.0",
"type": "component",
"description": "Abracon LLC Real-time Clocks (RTC), QFN-16(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"rtc-clock chip",
"ab1815-t3",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"ab1815-t3.kicad_sym",
"ab1815-t3.kicad_mod",
"ab1815-t3.glb",
"ab1815-t3.step",
"ab1815-t3.lbr",
"docs/hero.png",
"docs/ab1815-t3-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"ab1815-t3-hero.glb",
"ab1815-t3-hero.overlay.json",
"ab1815-t3-etched.glb"
],
"component": {
"mpn": "AB1815-T3",
"manufacturer": "Abracon LLC",
"package": "QFN-16(3x3)",
"pin_count": 17,
"category": "RTC/Clock Chip",
"subcategory": "Real-time Clocks (RTC)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a1347608d8a1a33abff8098bcf419207.pdf",
"parts": {
"symbol": "ab1815-t3.kicad_sym",
"footprint": "ab1815-t3.kicad_mod",
"model_3d": "ab1815-t3-hero.glb",
"model_3d_plain": "ab1815-t3-etched.glb",
"model_3d_step": "ab1815-t3-etched.step",
"model_3d_step_plain": "ab1815-t3.step",
"lbr": "ab1815-t3.lbr"
},
"distributor_links": {
"lcsc": "C568370",
"digikey": "535-11936-2-ND",
"mouser": "815-AB1815-T3"
},
"distributor_check": {
"checked_at": "2026-10-30T12:09:27Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "535-11936-2-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "815-AB1815-T3",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "nRST",
"type": "output",
"description": "External reset output, open drain with polarity set by the RSP bit (active low on power up); needs an external pull-up if used and can float if unused."
},
{
"number": "2",
"name": "WDI",
"type": "input",
"description": "Watchdog timer reset input that can also generate External 2 interrupt (EX2P/EX2E); has no internal pull, so it must not float and must be tied to VCC or VSS if unused."
},
{
"number": "3",
"name": "nEXTR",
"type": "input",
"description": "External reset input that drives nRST to its asserted value when low and RS1E is set; no internal pull, so it must not float and must be tied to VCC or VSS if unused."
},
{
"number": "4",
"name": "PSW/nIRQ2",
"type": "output",
"description": "Secondary open-drain interrupt output (OUT2S configurable) that becomes a ~1 Ω power switch when PWR2 is set; can float if unused."
},
{
"number": "5",
"name": "VBAT",
"type": "power_in",
"description": "Battery backup power connection; must be tied directly to VSS if no backup battery is present, and may also serve as the internal comparator analog input."
},
{
"number": "6",
"name": "SDO",
"type": "output",
"description": "SPI data output connection."
},
{
"number": "7",
"name": "SCL",
"type": "input",
"description": "Interface clock input for I2C and SPI parts; a pull-up resistor is required on this pin."
},
{
"number": "8",
"name": "CLKOUT/nIRQ3",
"type": "output",
"description": "Push-pull square wave output that can drive the OUT bit or the SQW square wave when SQWE is enabled."
},
{
"number": "9",
"name": "SDI",
"type": "input",
"description": "SPI data input connection."
},
{
"number": "10",
"name": "EXTI",
"type": "input",
"description": "External interrupt input (External 1 interrupt via EX1P/EX1E) with no internal pull, so it must not float and must be tied to VCC or VSS if unused."
},
{
"number": "11",
"name": "FOUT/nIRQ",
"type": "output",
"description": "Primary open-drain interrupt/function output (OUT1S configurable) requiring an external pull-up, asserted low at power up until the device is accessible via the serial interface."
},
{
"number": "12",
"name": "nCE",
"type": "input",
"description": "Active-low SPI chip select input; a pull-up resistor is recommended to avoid floating and inadvertent writes during power transitions."
},
{
"number": "13",
"name": "VCC",
"type": "power_in",
"description": "Primary power connection; a single supply must be connected to VCC."
},
{
"number": "14",
"name": "AF",
"type": "passive",
"description": "Autocalibration filter connection; place a 47 pF ceramic capacitor between this pin and VSS for improved Autocalibration timing accuracy."
},
{
"number": "15",
"name": "XO",
"type": "output",
"description": "Crystal oscillator output connection."
},
{
"number": "16",
"name": "XI",
"type": "input",
"description": "Crystal oscillator input connection."
},
{
"number": "17",
"name": "VSS",
"type": "power_in",
"description": "Ground connection; the thermal pad (pin 17) on the bottom of the QFN-16 package must be connected to VSS."
}
],
"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: Table 2 text extraction is flattened; AB1815 (SPI) column assignments (SDO=6, SDI=9, nCE=12, SCL=7, ; Pin types for XI/XO and open-drain outputs are inferred from names and descriptions; datasheet gives"
],
"pages_sent": 9,
"cost_usd": 0.1098,
"at": "2026-10-30T12:09:20"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/a1347608d8a1a33abff8098bcf419207.pdf",
"pages": 37,
"sha256": "8f5073f018cbaa67",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 17,
"described": 17,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "ab1815-t3.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
3.0,
3.0,
0.785
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "3eb81ffac423a66cdcfead8efe56401da171edaf1f2257049aad7b2d3900f6c8",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ab1815-t3-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
3.0,
3.0,
0.785
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "bbe8367839900a88b1d55f1ab0ff8e5ce632c8a000b05ba6b16e6c924c1f47da",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}