component
ATTINY25-20MUR
Public Made by Adomby adom
Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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{
"schema_version": 1,
"type": "component",
"slug": "attiny25-20mur",
"title": "ATTINY25-20MUR",
"brief": "Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), QFN-20-EP(4x4). 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",
"single chip microcomputer-microcontroller",
"attiny25-20mur",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ATTINY25-20MUR",
"manufacturer": "Microchip Tech",
"package": "QFN-20-EP(4x4)",
"pin_count": 21,
"category": "Single Chip Microcomputer/Microcontroller",
"subcategory": "Microcontroller Units (MCUs/MPUs/SOCs)",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/7db47648c463bd1d7aadc8b3d8a48ee3.pdf",
"parts": {
"symbol": "attiny25-20mur.kicad_sym",
"footprint": "attiny25-20mur.kicad_mod",
"model_3d": "attiny25-20mur-hero.glb",
"model_3d_plain": "attiny25-20mur-etched.glb",
"model_3d_step": "attiny25-20mur-etched.step",
"model_3d_step_plain": "attiny25-20mur.step",
"lbr": "attiny25-20mur.lbr"
},
"distributor_links": {
"lcsc": "C2052907",
"mouser": "556-ATTINY25-20MUR"
},
"distributor_check": {
"checked_at": "2026-10-28T23:44:14Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "deferred",
"error": "shared DigiKey quota guard: 989 calls left today"
},
"mouser": {
"pn": "556-ATTINY25-20MUR",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "PB5",
"type": "bidirectional",
"description": "Port B bit 5 with alternate functions PCINT5/RESET/ADC0/dW; a low level longer than the minimum pulse length on RESET generates a reset, and it can also be used as a (weak) I/O pin."
},
{
"number": "2",
"name": "PB3",
"type": "bidirectional",
"description": "Port B bit 3 with internal pull-up and alternate functions PCINT3/XTAL1/CLKI/OC1B/ADC3."
},
{
"number": "3",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "4",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "5",
"name": "PB4",
"type": "bidirectional",
"description": "Port B bit 4 with internal pull-up and alternate functions PCINT4/XTAL2/CLKO/OC1B/ADC2."
},
{
"number": "6",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "7",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "8",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "9",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "10",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "11",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0 with internal pull-up and alternate functions MOSI/DI/SDA/AIN0/OC0A/OC1A/AREF/PCINT0."
},
{
"number": "12",
"name": "PB1",
"type": "bidirectional",
"description": "Port B bit 1 with internal pull-up and alternate functions MISO/DO/AIN1/OC0B/OC1A/PCINT1."
},
{
"number": "13",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "14",
"name": "PB2",
"type": "bidirectional",
"description": "Port B bit 2 with internal pull-up and alternate functions SCK/USCK/SCL/ADC1/T0/INT0/PCINT2."
},
{
"number": "15",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage."
},
{
"number": "16",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "17",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "18",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "19",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "20",
"name": "DNC",
"type": "unconnected",
"description": "Do Not Connect."
},
{
"number": "21",
"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-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: The exposed pad has no printed pin number in the datasheet, so 'EP' is a placeholder. The datasheet ; The datasheet gives no electrical type for the port pins. They are classed as bidirectional from the",
"exposed pad 21 added from the footprint",
"dropped thermal pad ['EP'] absent from footprint",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 30,
"cost_usd": 0.318,
"at": "2026-10-28T23:43:57"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/7db47648c463bd1d7aadc8b3d8a48ee3.pdf",
"pages": 30,
"sha256": "fcdc535a426347b5",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 21,
"described": 21,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "attiny25-20mur.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4,
4,
0.77
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
"checked": "2026-10-28",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "attiny25-20mur-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
4,
4,
0.77
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "d07295b0ea7aa7be125db90c4f4848eb2abbd6069a2c46574f15a962896b0d4d",
"checked": "2026-10-28",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Microchip Tech",
"Package": "QFN-20-EP(4x4)",
"Category": "Single Chip Microcomputer/Microcontroller",
"Pins": "21"
},
"appearance": {
"contacts": {
"quote": "3. Code indicators: H = NiPdAu lead finish, U/N = matte tin, R = tape & reel. 4. Can also be supplied in wafer form. Contact your local Atmel sales office for ordering information and minimum quantiti",
"page": 11,
"doc": "ds.pdf",
"plating": "tin"
},
"version": 1,
"datasheet_sha256": "fcdc535a426347b57afac974a99328016787b875944fb497afe0e6c2085e01c5"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "fcdc535a426347b57afac974a99328016787b875944fb497afe0e6c2085e01c5",
"rows": [
{
"name": "Operating supply voltage VCC (ATtiny25, non-V, 20 MHz grade)",
"symbol": "VCC",
"kind": "recommended_operating",
"unit": "V",
"min": 2.7,
"typ": null,
"max": 5.5,
"conditions": "ATtiny25 (not V) 2.7 - 5.5V; ordering table 20 MHz grade lists 2.7 - 5.5V",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Speed grade, 20 MHz range",
"symbol": "fCLK",
"kind": "recommended_operating",
"unit": "MHz",
"min": 0,
"typ": null,
"max": 20,
"conditions": "@ 4.5 - 5.5V",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Speed grade, 10 MHz range",
"symbol": "fCLK",
"kind": "recommended_operating",
"unit": "MHz",
"min": 0,
"typ": null,
"max": 10,
"conditions": "@ 2.7 - 5.5V",
"source_page": 1,
"source": "datasheet"
},
{
"name": "Industrial operating temperature range (MUR package, -20 grade)",
"symbol": "TA",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 85,
"conditions": "Industrial (-40C to +85C) ordering row for ATtiny25-20MU / -20MUR (20M1 QFN)",
"source_page": 11,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"attiny25-20mur"
],
"discovery_pitch": "ATTINY25-20MUR (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"attiny25-20mur.kicad_sym",
"attiny25-20mur.kicad_mod",
"attiny25-20mur.glb",
"attiny25-20mur.step",
"attiny25-20mur.lbr",
"docs/hero.png",
"docs/attiny25-20mur-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"attiny25-20mur-hero.glb",
"attiny25-20mur-hero.overlay.json",
"attiny25-20mur-etched.glb"
],
"visibility": {
"public": true
}
}