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ATMEGA328-MU on a board, in 3D

ATMEGA328-MU

Microchip Technology

-40℃~+85℃ 1.8V~5.5V 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、External pin reset (NRST)、Built-in general-purpose timer、Programmable watchdog、Calendar function、Built-in temperature sensor、Touch function VQFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHS

Extended
DatasheetJLCPCBLCSCmicrochip/ATMEGA328-MU
Category
Microcontrollers (MCU, MPU, SOC)
Package
VQFN-32-EP(5x5)
Pins
33

Overview

The ATMEGA328-MU is a microcontroller made by Microchip Technology in a VQFN-32-EP(5x5) package with 33 pins. -40℃~+85℃ 1.8V~5.5V 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、External pin reset (NRST)、Built-in general-purpose timer、Programmable watchdog、Calendar function、Built-in temperature sensor、Touch function VQFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHS.

PCBKit's library has its KiCad symbol (MCU_Microchip_ATmega:ATmega328-M, from KiCad's library) and its footprint (Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.1x3.1mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C1337257). 21 open-source boards in 10 repositories on GitHub use it.

Symbol

PD31PD42GND3VCC4XTAL1/PB67XTAL2/PB78PD59PD610PD711PB012PB113PB214PB315PB416PB517AVCC18ADC619AREF20ADC722PC023PC124PC225PC326PC427PC528RESET/PC629PD030PD131PD232
MCU_Microchip_ATmega:ATmega328-MFrom KiCad's library

Footprint

33
Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.1x3.1mmFrom KiCad's library

Parameters

12
CPU Core
AVR
CPU Maximum Speed
20MHz
Core Size
8 Bit
EEPROM
1KB
Features
Power-on reset (POR), Undervoltage detection (BOR/LVD/LVR/LVI), Watchdog reset, External pin reset (NRST), Built-in general-purpose timer, Programmable watchdog, Calendar function, Touch function
Number of I/O
23
Operating Temperature
-40℃~+85℃
Oscillator Type
Built-in
Program Memory Type
FLASH
Program Storage Size
32KB
RAM Size
2KB
Voltage - Supply
1.8V~5.5V

Order codes

1

Pinout

33
The pins of the ATMEGA328-MU
PinNameType
1PD3Input/output
2PD4Input/output
3GNDPower in
4VCCPower in
5GNDPassive
6VCCPassive
7XTAL1/PB6Input/output
8XTAL2/PB7Input/output
9PD5Input/output
10PD6Input/output
11PD7Input/output
12PB0Input/output
13PB1Input/output
14PB2Input/output
15PB3Input/output
16PB4Input/output
17PB5Input/output
18AVCCPower in
19ADC6Input
20AREFPassive
21GNDPassive
22ADC7Input
23PC0Input/output
24PC1Input/output
25PC2Input/output
26PC3Input/output
27PC4Input/output
28PC5Input/output
29RESET/PC6Input/output
30PD0Input/output
31PD1Input/output
32PD2Input/output
33GNDPassive

Open-source boards using it

All 21
  • 4 layers51 × 19 mmArd nano2, the printed circuit board in 3D

    Ard nano2

    Amalthekkat/PCB-Portfolio

    PCB works

    35 parts
  • 2 layersTest project with uC, the printed circuit board in 3D

    Test project with uC

    DeshmukhMalhar/sch2header

    Scripts to auto-generate pin defination header from schematics

    5 parts
  • 4 layers47.5 × 22 mmArduino nano, the printed circuit board in 3D

    Arduino nano

    MaheshChowdaryDamuluri/Arduino-Nano-Project

    Welcome to the official repository for the Custom Arduino Nano Hardware Clone project. This repository houses the full programmatic schematic blueprints, advanced multi-layer stackup routing configurations, and…

    35 partsMIT
  • 2 layers45.2 × 19.8 mmAtMega328mu, the printed circuit board in 3D

    AtMega328mu

    SpecialBrands/AtMega328mu_Breakout

    18 parts
  • 2 layers68.5 × 53.4 mmArduino UNO Clone, the printed circuit board in 3D

    Arduino UNO Clone

    swapnil-maurya/Arduino-UNO-Clone-PCB

    Arduino UNO Clone PCB Design using KiCad

    52 parts
  • 2 layersKokoromi, the printed circuit board in 3D

    Kokoromi

    tetra-mix/kokoromi

    19 parts
  • 6 layers7.5 × 8 mmMiniscope v4-MCU, the printed circuit board in 3D

    Miniscope v4-MCU

    Aharoni-Lab/Miniscope-v4

    All things Miniscope v4

    12 parts161GPL-3.0

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Questions

Is there a KiCad symbol and footprint for the ATMEGA328-MU?

Yes. The symbol is MCU_Microchip_ATmega:ATmega328-M and the footprint Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.1x3.1mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the ATMEGA328-MU?

VQFN-32-EP(5x5), with 33 pins. Its footprint is drawn on this page.

Where is the ATMEGA328-MU datasheet?

Microchip Technology publishes it: the Datasheet link on this page opens it.

Where can I order the ATMEGA328-MU?

JLCPCB lists it as part C1337257, with 0 in stock; the sellers' links on this page open their listings.

What can replace the ATMEGA328-MU?

Parts like it in the library: the ATMEGA328P-MUR by Microchip Technology, the ATMEGA88PA-MU by Microchip Technology, the ATMEGA168PA-MU by Microchip Technology and the ATMEGA328PB-MN by Microchip Technology. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the ATMEGA328-MU?

21 boards in 10 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8