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ATTINY24A-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-microcontrollerattiny24a-murfactory-2.0.0extractor-text

Verified ATTINY24A-MUR

by Ray · last 2 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

2 Nov 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: ATTINY24A-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 C2053025, digikey ATTINY24A-MURTR-ND, mouser 556-ATTINY24A-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-yjvancrv/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✓ attiny24a-mur.kicad_sym✓ attiny24a-mur.kicad_mod✓ attiny24a-mur.step
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Ray Publish 0.1.0 d151f75 2d ago

ATTINY24A-MUR

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

ATTINY24A-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 PA4 bidirectional Port A bit 4, a bi-directional I/O pin with internal pull-up, with alternate functions ADC4/USCK/SCL/T1/PCINT4.
2 PA3 bidirectional Port A bit 3, a bi-directional I/O pin with internal pull-up, with alternate functions ADC3/T0/PCINT3.
3 PA2 bidirectional Port A bit 2, a bi-directional I/O pin with internal pull-up, with alternate functions ADC2/AIN1/PCINT2.
4 PA1 bidirectional Port A bit 1, a bi-directional I/O pin with internal pull-up, with alternate functions ADC1/AIN0/PCINT1.
5 PA0 bidirectional Port A bit 0, a bi-directional I/O pin with internal pull-up, with alternate functions ADC0/AREF/PCINT0.
6 DNC unconnected Do Not Connect.
7 DNC unconnected Do Not Connect.
8 GND power_in Ground.
9 VCC power_in Supply voltage.
10 DNC unconnected Do Not Connect.
11 PB0 bidirectional Port B bit 0, a bi-directional I/O pin with internal pull-up, with alternate functions PCINT8/XTAL1/CLKI.
12 PB1 bidirectional Port B bit 1, a bi-directional I/O pin with internal pull-up, with alternate functions PCINT9/XTAL2.
13 PB3 bidirectional Port B bit 3 which is also the RESET input (active low, longer than the minimum pulse length resets the device) and dW; it can be used as an I/O pin if the RSTDISBL fuse is programmed ('0').
14 PB2 bidirectional Port B bit 2, a bi-directional I/O pin with internal pull-up, with alternate functions PCINT10/INT0/OC0A/CKOUT.
15 PA7 bidirectional Port A bit 7, a bi-directional I/O pin with internal pull-up, with alternate functions PCINT7/ICP/OC0B/ADC7.
16 PA6 bidirectional Port A bit 6, a bi-directional I/O pin with internal pull-up, with alternate functions PCINT6/OC1A/SDA/MOSI/DI/ADC6.
17 DNC unconnected Do Not Connect.
18 DNC unconnected Do Not Connect.
19 DNC unconnected Do Not Connect.
20 PA5 bidirectional Port A bit 5, a bi-directional I/O pin with internal pull-up, with alternate functions ADC5/DO/MISO/OC1B/PCINT5.
21 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

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 grade (MUR suffix) 1
Speed grade 0 20 MHz 4.5, 5.5V 1
Active mode supply current 210 µA 1.8V and 1 MHz 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, F, N, U: matte tin 11

CAD (KiCad official)

  • Symbol: ATTINY24A-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: attiny24a-mur-etched.step / attiny24a-mur-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); attiny24a-mur.step / attiny24a-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 ca5043a11d917274, retrieved 2026-11-02, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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