component

ATTINY427-MFR

Public Made by Adom

by adom

Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), VQFN-24(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsingle chip microcomputer-microcontrollerattiny427-mfrfactory-2.0.0extractor-text

Verified ATTINY427-MFR

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

Verification log 1 record

2 Nov 2026RayPublished by the parts factory: tier mfr, 25 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATTINY427-MFR · VQFN-24(4x4) · 25 pins
  • ✓copper: 25 copper pads, none touching another net
  • ✓datasheet: all 25 pin names found in the 532-page datasheet
  • ✓distributor: lcsc C3219936, digikey 150-ATTINY427-MFRTR-ND, mouser 579-ATTINY427-MFR
  • ✓family: QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-brsmsj66/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: 25 pins = 25 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 25 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ attiny427-mfr.kicad_sym✓ attiny427-mfr.kicad_mod✓ attiny427-mfr.step
Spot something wrong? Report it as an issue Propose a fix Records are signed by members of adom.
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

PCB Footprint

Open full view ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

Datasheet

Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Download PDF
Contents

README

markdown

ATTINY427-MFR

Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · VQFN-24(4x4)

ATTINY427-MFR from Microchip Tech, in a VQFN-24(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 PA2 bidirectional General-purpose I/O pin PA2 that also carries EVOUTA, AIN2, the alternate RXD and the MISO/LUT0-IN2 functions.
2 PA3 bidirectional General-purpose I/O pin PA3 that also serves as EXTCLK, AIN3, the alternate XCK, SCK and WO3/WO functions.
3 GND power_in Ground reference pin for the device.
4 VDD power_in Power supply pin; each supply pin pair needs its own decoupling capacitor close to the pins (section 4.2).
5 PA4 bidirectional General-purpose I/O pin PA4 that also carries AIN4, the alternate XDIR, SS, WO4 and LUT0-OUT functions.
6 PA5 bidirectional General-purpose I/O pin PA5 that also carries VREFA, AIN5, OUT, WO5/WO and the alternate LUT3-OUT functions.
7 PA6 bidirectional General-purpose I/O pin PA6 that also carries AIN6 and AINN0.
8 PA7 bidirectional General-purpose I/O pin PA7 that also carries the alternate EVOUTA, AIN7, AINP0 and LUT1-OUT functions.
9 PB7 bidirectional General-purpose I/O pin PB7 that also carries the alternate EVOUTB function.
10 PB6 bidirectional General-purpose I/O pin PB6 that also carries AINP3 and the alternate LUT2-OUT function.
11 PB5 bidirectional General-purpose I/O pin PB5 that also carries CLKOUT, AIN8, AINP1 and the alternate WO2 function.
12 PB4 bidirectional General-purpose I/O pin PB4 that also carries the alternate RESET function, AIN9, AINN1, the alternate WO1 and LUT0-OUT functions.
13 PB3 bidirectional General-purpose I/O pin PB3 that also serves as the TOSC1 crystal oscillator input, RxD, WO0 and LUT2-OUT functions.
14 PB2 bidirectional General-purpose I/O pin PB2 that also serves as the TOSC2 crystal oscillator output, EVOUTB, TxD, WO2 and LUT2-IN2 functions.
15 PB1 bidirectional General-purpose I/O pin PB1 that also carries AIN10, AINP2, XCK, SDA, WO1 and LUT2-IN1 functions.
16 PB0 bidirectional General-purpose I/O pin PB0 that also carries AIN11, AINN2, XDIR, SCL, WO0 and LUT2-IN0 functions.
17 PC0 bidirectional General-purpose I/O pin PC0 that also carries AIN12, the alternate XCK, SCK and WO0 functions, and LUT3-IN0.
18 PC1 bidirectional General-purpose I/O pin PC1 that also carries AIN13, the alternate RxD, MISO and LUT1-OUT functions, and LUT3-IN1.
19 PC2 bidirectional General-purpose I/O pin PC2 that also carries EVOUTC, AIN14, the alternate TxD and MOSI functions, and LUT3-IN2.
20 PC3 bidirectional General-purpose I/O pin PC3 that also carries AIN15, the alternate XDIR, SS and WO3 functions, and LUT1-IN0.
21 PC4 bidirectional General-purpose I/O pin PC4 that also carries the alternate WO4 and WO functions and LUT1-IN1.
22 PC5 bidirectional General-purpose I/O pin PC5 that also carries the alternate WO5 function and LUT1-IN2.
23 PA0 bidirectional 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.
24 PA1 bidirectional General-purpose I/O pin PA1 that also carries AIN1, the alternate TXD, MOSI and LUT0-IN1 functions.
25 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package VQFN-24(4x4)
Category Single Chip Microcomputer/Microcontroller
Pins 25

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage VDD 1.8 5.5 V Supply Voltage column, ATTINY427-MFR (VQFN 24-pin, 4 KB/512B) ordering row 508
Operating temperature range -40 125 °C Temperature Range column, ATTINY427-MFR (MF, tape & reel) ordering row 508

CAD (KiCad official)

  • Symbol: ATTINY427-MFR
  • Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm
  • 3D model: VQFN-24(4x4) (KiCad packages3D, STEP)
  • 3D model files: attiny427-mfr-etched.step / attiny427-mfr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); attiny427-mfr.step / attiny427-mfr.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (532 pp, sha256 654989c2c48c3753, retrieved 2026-11-02, tier: manufacturer)
  • 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