component
ATTINY427-MFR
Public Made by Adomby adom
Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), VQFN-24(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296
{
"slug": "attiny427-mfr",
"version": "0.1.0",
"type": "component",
"description": "Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), VQFN-24(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"single chip microcomputer-microcontroller",
"attiny427-mfr",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"attiny427-mfr.kicad_sym",
"attiny427-mfr.kicad_mod",
"attiny427-mfr.glb",
"attiny427-mfr.step",
"attiny427-mfr.lbr",
"docs/hero.png",
"docs/attiny427-mfr-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"attiny427-mfr-hero.glb",
"attiny427-mfr-hero.overlay.json",
"attiny427-mfr-etched.glb"
],
"component": {
"mpn": "ATTINY427-MFR",
"manufacturer": "Microchip Tech",
"package": "VQFN-24(4x4)",
"pin_count": 25,
"category": "Single Chip Microcomputer/Microcontroller",
"subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/3ae8065bab9cde6fd0bd760d42b9401d.pdf",
"parts": {
"symbol": "attiny427-mfr.kicad_sym",
"footprint": "attiny427-mfr.kicad_mod",
"model_3d": "attiny427-mfr-hero.glb",
"model_3d_plain": "attiny427-mfr-etched.glb",
"model_3d_step": "attiny427-mfr-etched.step",
"model_3d_step_plain": "attiny427-mfr.step",
"lbr": "attiny427-mfr.lbr"
},
"distributor_links": {
"lcsc": "C3219936",
"digikey": "150-ATTINY427-MFRTR-ND",
"mouser": "579-ATTINY427-MFR"
},
"distributor_check": {
"checked_at": "2026-11-02T17:18:31Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "150-ATTINY427-MFRTR-ND",
"status": "found"
},
"mouser": {
"pn": "579-ATTINY427-MFR",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PA2",
"type": "bidirectional",
"description": "General-purpose I/O pin PA2 that also carries EVOUTA, AIN2, the alternate RXD and the MISO/LUT0-IN2 functions."
},
{
"number": "2",
"name": "PA3",
"type": "bidirectional",
"description": "General-purpose I/O pin PA3 that also serves as EXTCLK, AIN3, the alternate XCK, SCK and WO3/WO functions."
},
{
"number": "3",
"name": "GND",
"type": "power_in",
"description": "Ground reference pin for the device."
},
{
"number": "4",
"name": "VDD",
"type": "power_in",
"description": "Power supply pin; each supply pin pair needs its own decoupling capacitor close to the pins (section 4.2)."
},
{
"number": "5",
"name": "PA4",
"type": "bidirectional",
"description": "General-purpose I/O pin PA4 that also carries AIN4, the alternate XDIR, SS, WO4 and LUT0-OUT functions."
},
{
"number": "6",
"name": "PA5",
"type": "bidirectional",
"description": "General-purpose I/O pin PA5 that also carries VREFA, AIN5, OUT, WO5/WO and the alternate LUT3-OUT functions."
},
{
"number": "7",
"name": "PA6",
"type": "bidirectional",
"description": "General-purpose I/O pin PA6 that also carries AIN6 and AINN0."
},
{
"number": "8",
"name": "PA7",
"type": "bidirectional",
"description": "General-purpose I/O pin PA7 that also carries the alternate EVOUTA, AIN7, AINP0 and LUT1-OUT functions."
},
{
"number": "9",
"name": "PB7",
"type": "bidirectional",
"description": "General-purpose I/O pin PB7 that also carries the alternate EVOUTB function."
},
{
"number": "10",
"name": "PB6",
"type": "bidirectional",
"description": "General-purpose I/O pin PB6 that also carries AINP3 and the alternate LUT2-OUT function."
},
{
"number": "11",
"name": "PB5",
"type": "bidirectional",
"description": "General-purpose I/O pin PB5 that also carries CLKOUT, AIN8, AINP1 and the alternate WO2 function."
},
{
"number": "12",
"name": "PB4",
"type": "bidirectional",
"description": "General-purpose I/O pin PB4 that also carries the alternate RESET function, AIN9, AINN1, the alternate WO1 and LUT0-OUT functions."
},
{
"number": "13",
"name": "PB3",
"type": "bidirectional",
"description": "General-purpose I/O pin PB3 that also serves as the TOSC1 crystal oscillator input, RxD, WO0 and LUT2-OUT functions."
},
{
"number": "14",
"name": "PB2",
"type": "bidirectional",
"description": "General-purpose I/O pin PB2 that also serves as the TOSC2 crystal oscillator output, EVOUTB, TxD, WO2 and LUT2-IN2 functions."
},
{
"number": "15",
"name": "PB1",
"type": "bidirectional",
"description": "General-purpose I/O pin PB1 that also carries AIN10, AINP2, XCK, SDA, WO1 and LUT2-IN1 functions."
},
{
"number": "16",
"name": "PB0",
"type": "bidirectional",
"description": "General-purpose I/O pin PB0 that also carries AIN11, AINN2, XDIR, SCL, WO0 and LUT2-IN0 functions."
},
{
"number": "17",
"name": "PC0",
"type": "bidirectional",
"description": "General-purpose I/O pin PC0 that also carries AIN12, the alternate XCK, SCK and WO0 functions, and LUT3-IN0."
},
{
"number": "18",
"name": "PC1",
"type": "bidirectional",
"description": "General-purpose I/O pin PC1 that also carries AIN13, the alternate RxD, MISO and LUT1-OUT functions, and LUT3-IN1."
},
{
"number": "19",
"name": "PC2",
"type": "bidirectional",
"description": "General-purpose I/O pin PC2 that also carries EVOUTC, AIN14, the alternate TxD and MOSI functions, and LUT3-IN2."
},
{
"number": "20",
"name": "PC3",
"type": "bidirectional",
"description": "General-purpose I/O pin PC3 that also carries AIN15, the alternate XDIR, SS and WO3 functions, and LUT1-IN0."
},
{
"number": "21",
"name": "PC4",
"type": "bidirectional",
"description": "General-purpose I/O pin PC4 that also carries the alternate WO4 and WO functions and LUT1-IN1."
},
{
"number": "22",
"name": "PC5",
"type": "bidirectional",
"description": "General-purpose I/O pin PC5 that also carries the alternate WO5 function and LUT1-IN2."
},
{
"number": "23",
"name": "PA0",
"type": "bidirectional",
"description": "Pin PA0 is the RESET/UPDI pin; its function is selected by the RSTPINCFG fuse (GPIO, UPDI, RESET, or UPDI with alternate RESET), and it also carries LUT0-IN0."
},
{
"number": "24",
"name": "PA1",
"type": "bidirectional",
"description": "General-purpose I/O pin PA1 that also carries AIN1, the alternate TXD, MOSI and LUT0-IN1 functions."
},
{
"number": "25",
"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 datasheet's VQFN-24 pin map is in the figure text, which is hard to read. The pin numbers were t"
],
"pages_sent": 100,
"cost_usd": 0.0963,
"at": "2026-11-02T17:18:19"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/3ae8065bab9cde6fd0bd760d42b9401d.pdf",
"pages": 532,
"sha256": "654989c2c48c3753",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 25,
"described": 25,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "attiny427-mfr.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4.0,
4.0,
0.77
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "096fc110543e6d324c5120c2d38e3dca87a389da9b6fac234f1fe40856295ef4",
"checked": "2026-11-02",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "attiny427-mfr-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4.0,
4.0,
0.77
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "a6c6fa1bc45b1a49187d921e8b51e2ffbd6568e3a2c4b712491fe1df6dca90fc",
"checked": "2026-11-02",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}