component
ATTINY4313-MUR
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.
main
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{
"slug": "attiny4313-mur",
"version": "0.1.0",
"type": "component",
"description": "Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"single chip microcomputer-microcontroller",
"attiny4313-mur",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"attiny4313-mur.kicad_sym",
"attiny4313-mur.kicad_mod",
"attiny4313-mur.glb",
"attiny4313-mur.step",
"attiny4313-mur.lbr",
"docs/hero.png",
"docs/attiny4313-mur-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"attiny4313-mur-hero.glb",
"attiny4313-mur-hero.overlay.json",
"attiny4313-mur-etched.glb"
],
"component": {
"mpn": "ATTINY4313-MUR",
"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/12c62af36aeb1d721fbca47c98b5f1b6.pdf",
"parts": {
"symbol": "attiny4313-mur.kicad_sym",
"footprint": "attiny4313-mur.kicad_mod",
"model_3d": "attiny4313-mur-hero.glb",
"model_3d_plain": "attiny4313-mur-etched.glb",
"model_3d_step": "attiny4313-mur-etched.step",
"model_3d_step_plain": "attiny4313-mur.step",
"lbr": "attiny4313-mur.lbr"
},
"distributor_links": {
"lcsc": "C2651944",
"digikey": "ATTINY4313-MURTR-ND",
"mouser": "556-ATTINY4313-MUR"
},
"distributor_check": {
"checked_at": "2026-10-30T23:47:14Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "ATTINY4313-MURTR-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "556-ATTINY4313-MUR",
"status": "found",
"lifecycle": "Not Recommended for New Designs"
}
},
"pins": [
{
"number": "1",
"name": "PD1",
"type": "bidirectional",
"description": "Port D bit 1 with internal pull-up, alternate functions TXD and PCINT12."
},
{
"number": "2",
"name": "PA1",
"type": "bidirectional",
"description": "Port A bit 1 with internal pull-up, alternate functions XTAL2 (output from the inverting oscillator amplifier) and PCINT9."
},
{
"number": "3",
"name": "PA0",
"type": "bidirectional",
"description": "Port A bit 0 with internal pull-up, alternate functions XTAL1 (oscillator amplifier and internal clock circuit input), CLKI and PCINT8."
},
{
"number": "4",
"name": "PD2",
"type": "bidirectional",
"description": "Port D bit 2 with internal pull-up, alternate functions CKOUT, XCK, INT0 and PCINT13."
},
{
"number": "5",
"name": "PD3",
"type": "bidirectional",
"description": "Port D bit 3 with internal pull-up, alternate functions INT1 and PCINT14."
},
{
"number": "6",
"name": "PD4",
"type": "bidirectional",
"description": "Port D bit 4 with internal pull-up, alternate functions T0 and PCINT15."
},
{
"number": "7",
"name": "PD5",
"type": "bidirectional",
"description": "Port D bit 5 with internal pull-up, alternate functions OC0B, T1 and PCINT16."
},
{
"number": "8",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "9",
"name": "PD6",
"type": "bidirectional",
"description": "Port D bit 6 with internal pull-up, alternate functions ICPI and PCINT17."
},
{
"number": "10",
"name": "PB0",
"type": "bidirectional",
"description": "Port B bit 0 with internal pull-up, alternate functions AIN0 and PCINT0."
},
{
"number": "11",
"name": "PB1",
"type": "bidirectional",
"description": "Port B bit 1 with internal pull-up, alternate functions AIN1 and PCINT1."
},
{
"number": "12",
"name": "PB2",
"type": "bidirectional",
"description": "Port B bit 2 with internal pull-up, alternate functions OC0A and PCINT2."
},
{
"number": "13",
"name": "PB3",
"type": "bidirectional",
"description": "Port B bit 3 with internal pull-up, alternate functions OC1A and PCINT3."
},
{
"number": "14",
"name": "PB4",
"type": "bidirectional",
"description": "Port B bit 4 with internal pull-up, alternate functions OC1B and PCINT4."
},
{
"number": "15",
"name": "PB5",
"type": "bidirectional",
"description": "Port B bit 5 with internal pull-up, alternate functions MOSI, DI, SDA and PCINT5."
},
{
"number": "16",
"name": "PB6",
"type": "bidirectional",
"description": "Port B bit 6 with internal pull-up, alternate functions MISO, DO and PCINT6."
},
{
"number": "17",
"name": "PB7",
"type": "bidirectional",
"description": "Port B bit 7 with internal pull-up, alternate functions USCK, SCL, SCK and PCINT7."
},
{
"number": "18",
"name": "VCC",
"type": "power_in",
"description": "Digital supply voltage, 1.8 to 5.5 V operating range."
},
{
"number": "19",
"name": "PA2",
"type": "bidirectional",
"description": "Port A bit 2 which is RESET (active-low reset input, also dW) unless the RSTDISBL fuse is programmed to use it as I/O; also PCINT10."
},
{
"number": "20",
"name": "PD0",
"type": "bidirectional",
"description": "Port D bit 0 with internal pull-up, alternate functions RXD and PCINT11."
},
{
"number": "21",
"name": "EP",
"type": "passive",
"description": "Exposed bottom pad, which the datasheet says should be soldered to ground."
}
],
"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 pin number in the datasheet. I labelled it '21' as a placeholder. The datashe; The ordering table lists ATtiny4313-MUR under package 20M1 (20-pad 4x4 MLF with a 2.6 mm exposed pad",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 22,
"cost_usd": 0.3517,
"at": "2026-10-30T23:47:00"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/12c62af36aeb1d721fbca47c98b5f1b6.pdf",
"pages": 22,
"sha256": "40038ab6257b67fe",
"source_tier": "lcsc"
},
"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": "attiny4313-mur.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": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "attiny4313-mur-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": "e29a8af9334b747c19e8aa96a9ff0e3404e5013bcfd21785ab2f5c57170cd950",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}