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ATMEGA328-MUR

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Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), VQFN-32(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsingle chip microcomputer-microcontrolleratmega328-murfactory-2.0.0extractor-text

Verified ATMEGA328-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 mfr, 33 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATMEGA328-MUR · VQFN-32(5x5) · 33 pins
  • ✓copper: 33 copper pads, none touching another net
  • ✓datasheet: all 33 pin names found in the 653-page datasheet
  • ✓distributor: lcsc C2052748, digikey ATMEGA328-MURTR-ND, mouser 556-ATMEGA328-MUR
  • ✓family: QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-mr2_vvr4/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: 33 pins = 33 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 33 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ atmega328-mur.kicad_sym✓ atmega328-mur.kicad_mod✓ atmega328-mur.step
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Ray Publish 0.1.0 aae0f71 5d ago

ATMEGA328-MUR

Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · VQFN-32(5x5)

ATMEGA328-MUR from Microchip Tech, in a VQFN-32(5x5). 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 PD3 bidirectional Port D bit 3 is a bi-directional I/O with internal pull-up that also serves as INT1 external interrupt source, OC2B output and PCINT19.
2 PD4 bidirectional Port D bit 4 is a bi-directional I/O with internal pull-up that also serves as USART external clock XCK, Timer/Counter0 counter input T0 and PCINT20.
3 GND power_in Ground reference for the digital supply.
4 VCC power_in Digital supply voltage pin.
5 GND power_in Ground reference for the digital supply.
6 VCC power_in Digital supply voltage pin.
7 PB6 input Port B bit 6 is used as XTAL1 input to the inverting oscillator amplifier or external clock input, and also as TOSC1 and PCINT6.
8 PB7 output Port B bit 7 is used as XTAL2 output of the inverting oscillator amplifier, and also as TOSC2 and PCINT7.
9 PD5 bidirectional Port D bit 5 is a bi-directional I/O with internal pull-up that also serves as Timer/Counter1 external counter input T1, OC0B output and PCINT21.
10 PD6 bidirectional Port D bit 6 is a bi-directional I/O with internal pull-up that also serves as analog comparator positive input AIN0, OC0A output and PCINT22.
11 PD7 bidirectional Port D bit 7 is a bi-directional I/O with internal pull-up that also serves as analog comparator negative input AIN1 and PCINT23.
12 PB0 bidirectional Port B bit 0 is a bi-directional I/O with internal pull-up that also serves as input capture input ICP1, divided system clock output CLKO and PCINT0.
13 PB1 bidirectional Port B bit 1 is a bi-directional I/O with internal pull-up that also serves as Timer/Counter1 compare output OC1A and PCINT1.
14 PB2 bidirectional Port B bit 2 is a bi-directional I/O with internal pull-up that also serves as SPI slave select SS, Timer/Counter1 compare output OC1B and PCINT2.
15 PB3 bidirectional Port B bit 3 is a bi-directional I/O with internal pull-up that also serves as SPI MOSI, Timer/Counter2 compare output OC2A and PCINT3.
16 PB4 bidirectional Port B bit 4 is a bi-directional I/O with internal pull-up that also serves as SPI MISO and PCINT4.
17 PB5 bidirectional Port B bit 5 is a bi-directional I/O with internal pull-up that also serves as SPI clock SCK and PCINT5.
18 AVCC power_in Supply voltage pin for the A/D converter, PC3:0 and ADC7:6, which should be connected to VCC even if the ADC is not used.
19 ADC6 input Analog input channel 6 of the 10-bit ADC, available only in the TQFP and VQFN packages and powered from the analog supply.
20 AREF input Analog reference pin for the A/D converter.
21 GND power_in Ground reference for the digital supply.
22 ADC7 input Analog input channel 7 of the 10-bit ADC, available only in the TQFP and VQFN packages and powered from the analog supply.
23 PC0 bidirectional Port C bit 0 is a bi-directional I/O with internal pull-up that also serves as ADC input channel 0 and PCINT8.
24 PC1 bidirectional Port C bit 1 is a bi-directional I/O with internal pull-up that also serves as ADC input channel 1 and PCINT9.
25 PC2 bidirectional Port C bit 2 is a bi-directional I/O with internal pull-up that also serves as ADC input channel 2 and PCINT10.
26 PC3 bidirectional Port C bit 3 is a bi-directional I/O with internal pull-up that also serves as ADC input channel 3 and PCINT11.
27 PC4 bidirectional Port C bit 4 is a bi-directional I/O with internal pull-up that also serves as 2-wire serial data SDA, ADC input channel 4 and PCINT12, using digital power.
28 PC5 bidirectional Port C bit 5 is a bi-directional I/O with internal pull-up that also serves as 2-wire serial clock SCL, ADC input channel 5 and PCINT13, using digital power.
29 PC6 input PC6 is the Reset input when the RSTDISBL fuse is unprogrammed, where a low level longer than the minimum pulse length generates a reset, and otherwise an I/O pin, also PCINT14.
30 PD0 bidirectional Port D bit 0 is a bi-directional I/O with internal pull-up that also serves as USART receive data input RXD and PCINT16.
31 PD1 bidirectional Port D bit 1 is a bi-directional I/O with internal pull-up that also serves as USART transmit data output TXD and PCINT17.
32 PD2 bidirectional Port D bit 2 is a bi-directional I/O with internal pull-up that also serves as external interrupt source INT0 and PCINT18.
33 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package VQFN-32(5x5)
Category Single Chip Microcomputer/Microcontroller
Pins 33

CAD (KiCad official)

  • Symbol: ATMEGA328-MUR
  • Footprint: Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
  • 3D model: VQFN-32(5x5) (KiCad packages3D, STEP)
  • 3D model files: atmega328-mur-etched.step / atmega328-mur-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega328-mur.step / atmega328-mur.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (653 pp, sha256 b9b9d83cda56a95d, retrieved 2026-10-30, 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