component

ATTINY4313-MUR

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Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsingle chip microcomputer-microcontrollerattiny4313-murfactory-2.0.0extractor-text

Verified ATTINY4313-MUR

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier lcsc, 21 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATTINY4313-MUR · QFN-20-EP(4x4) · 21 pins
  • ✓copper: 21 copper pads, none touching another net
  • ✓datasheet: all 21 pin names found in the 22-page datasheet
  • ✓distributor: lcsc C2651944, digikey ATTINY4313-MURTR-ND, mouser 556-ATTINY4313-MUR
  • ✓family: QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-p0ay4a2s/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 21 pins = 21 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 21 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ attiny4313-mur.kicad_sym✓ attiny4313-mur.kicad_mod✓ attiny4313-mur.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 5d ago
viewers attiny4313-mur: viewers · Ray 5d ago
attiny4313-mur-etched.glb Publish 0.1.0 · Ray 5d ago
attiny4313-mur-etched.step attiny4313-mur: factory component page (tier=lcsc) · Ray 5d ago
attiny4313-mur-hero.glb attiny4313-mur: hero GLB from the etched model (keeps the MPN mark) · Ray 5d ago
attiny4313-mur-hero.overlay.json Publish 0.1.0 · Ray 5d ago
attiny4313-mur.glb Publish 0.1.0 · Ray 5d ago
attiny4313-mur.kicad_mod Publish 0.1.0 · Ray 5d ago
attiny4313-mur.kicad_sym Publish 0.1.0 · Ray 5d ago
attiny4313-mur.lbr Publish 0.1.0 · Ray 5d ago
attiny4313-mur.step Publish 0.1.0 · Ray 5d ago
package.json Publish 0.1.0 · Ray 5d ago
page.json Set visibility: public · Ray 5d ago
README.md Publish 0.1.0 · Ray 5d ago
verification.json Verified: Published by the parts factory: tier lcsc, 21 pins · Ray 5d ago

ATTINY4313-MUR

Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · QFN-20-EP(4x4)

ATTINY4313-MUR from Microchip Tech, in a QFN-20-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 PD1 bidirectional Port D bit 1 with internal pull-up, alternate functions TXD and PCINT12.
2 PA1 bidirectional Port A bit 1 with internal pull-up, alternate functions XTAL2 (output from the inverting oscillator amplifier) and PCINT9.
3 PA0 bidirectional Port A bit 0 with internal pull-up, alternate functions XTAL1 (oscillator amplifier and internal clock circuit input), CLKI and PCINT8.
4 PD2 bidirectional Port D bit 2 with internal pull-up, alternate functions CKOUT, XCK, INT0 and PCINT13.
5 PD3 bidirectional Port D bit 3 with internal pull-up, alternate functions INT1 and PCINT14.
6 PD4 bidirectional Port D bit 4 with internal pull-up, alternate functions T0 and PCINT15.
7 PD5 bidirectional Port D bit 5 with internal pull-up, alternate functions OC0B, T1 and PCINT16.
8 GND power_in Ground.
9 PD6 bidirectional Port D bit 6 with internal pull-up, alternate functions ICPI and PCINT17.
10 PB0 bidirectional Port B bit 0 with internal pull-up, alternate functions AIN0 and PCINT0.
11 PB1 bidirectional Port B bit 1 with internal pull-up, alternate functions AIN1 and PCINT1.
12 PB2 bidirectional Port B bit 2 with internal pull-up, alternate functions OC0A and PCINT2.
13 PB3 bidirectional Port B bit 3 with internal pull-up, alternate functions OC1A and PCINT3.
14 PB4 bidirectional Port B bit 4 with internal pull-up, alternate functions OC1B and PCINT4.
15 PB5 bidirectional Port B bit 5 with internal pull-up, alternate functions MOSI, DI, SDA and PCINT5.
16 PB6 bidirectional Port B bit 6 with internal pull-up, alternate functions MISO, DO and PCINT6.
17 PB7 bidirectional Port B bit 7 with internal pull-up, alternate functions USCK, SCL, SCK and PCINT7.
18 VCC power_in Digital supply voltage, 1.8 to 5.5 V operating range.
19 PA2 bidirectional 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.
20 PD0 bidirectional Port D bit 0 with internal pull-up, alternate functions RXD and PCINT11.
21 EP passive Exposed bottom pad, which the datasheet says should be soldered to ground.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package QFN-20-EP(4x4)
Category Single Chip Microcomputer/Microcontroller
Pins 21

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Operating Voltage 1.8 5.5 V 1
Industrial Temperature Range -40 85 °C Industrial temperature range 1
Speed grade 0, 4 MHz 0 4 MHz 1.8, 5.5 V 1
Speed grade 0, 10 MHz 0 10 MHz 2.7, 5.5 V 1
Speed grade 0, 20 MHz 0 20 MHz 4.5, 5.5 V 1
Active Mode current 190 µA 1.8 V and 1 MHz 1
Idle Mode current 24 µA 1.8 V and 1 MHz 1
Power-down Mode current 0.1 µA 1.8 V and +25°C 1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin , H: NiPdAu lead finish, U or N: matte tin 12

CAD (KiCad official)

  • Symbol: ATTINY4313-MUR
  • Footprint: Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm
  • 3D model: QFN-20-EP(4x4) (KiCad packages3D, STEP)
  • 3D model files: attiny4313-mur-etched.step / attiny4313-mur-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); attiny4313-mur.step / attiny4313-mur.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (22 pp, sha256 40038ab6257b67fe, retrieved 2026-10-30, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF