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ATMEGA328-AUR

8-bit AVR MCU, 32KB Flash, 2KB SRAM, 23 I/O, 8ch 10-bit ADC, TQFP-32, T&R

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Manufacturer Part：

ATMEGA328-AUR

Package：

TQFP-32 (7.0 x 7.0 x 1.05mm)

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Description

Product Overview

The ATMEGA328-AUR from Microchip Technology is an 8-bit AVR RISC microcontroller in a 32-pin TQFP tape-and-reel package. It features 32KB ISP Flash, 2KB SRAM, 1KB EEPROM, 23 I/O, 8-channel 10-bit ADC, 6 PWM, and operates from 1.8V to 5.5V at up to 20MHz. This is the tape-and-reel (AUR suffix) variant of the ATMEGA328-AU.

Key Specifications

Core AVR (8-bit RISC)
Max Frequency 20MHz (20 MIPS)
Program Memory 32KB ISP Flash
Data SRAM 2KB
Data EEPROM 1KB
I/O Pins 23
ADC 8-channel 10-bit (TQFP package)
PWM Channels 6
Timers 2 x 8-bit, 1 x 16-bit
Serial Interfaces USART, SPI, I2C (TWI)
Supply Voltage 1.8V to 5.5V
Package TQFP-32 (7 x 7mm)
Packaging Tape & Reel (2000/reel)
Operating Temperature -40°C to +85°C
Life Cycle NRND (Not Recommended for New Designs)

Features

  • 131 instructions, most single-clock-cycle execution
  • 32 x 8-bit general purpose working registers
  • 32KB ISP Flash with read-while-write
  • 1KB EEPROM with 100K write/erase cycles
  • 2KB SRAM
  • 6 software-selectable power-saving modes
  • Programmable serial USART
  • Master/Slave SPI serial interface
  • Byte-oriented 2-wire interface (I2C compatible)
  • Programmable watchdog timer with separate oscillator
  • Analog comparator

Applications

  • Embedded control systems
  • Consumer electronics
  • Industrial automation
  • PC peripherals
  • Battery-powered instruments

The ATMEGA328-AUR from Microchip Technology is the tape-and-reel (AUR suffix) production packaging variant of the ATMEGA328-AU, an 8-bit AVR RISC microcontroller in a 32-pin TQFP package. It provides 32KB ISP Flash, 2KB SRAM, 1KB EEPROM, 23 I/O pins, 8-channel 10-bit ADC, 6 PWM channels, USART, SPI, and I2C interfaces. Operating from 1.8V to 5.5V at up to 20MHz, it delivers near 1 MIPS per MHz throughput. The AUR suffix indicates tape-and-reel packaging with 2000 units per reel, suitable for SMT production. Note: This device is NRND; ATMEGA328PB-AUR is recommended for new designs.

The ATMEGA328-AUR is functionally identical to the ATMEGA328P-AU, using the AVR enhanced RISC architecture with Harvard bus and 2-stage pipeline. The 32 general-purpose registers are directly connected to the ALU for single-cycle register access. The ISP Flash supports in-system programming and read-while-write through a boot loader section. Six power-saving modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) allow flexible power optimization. The 16-bit Timer/Counter with input capture and PWM supports motor control and audio applications.

Pin Name Type Function
1-3 PD3-PD1 I/O Port D / INT1 / OC2B / TXD
4 PD0/RXD I/O Port D / INT0 / RXD
5-6 PD4, VCC I/O/Power Port D / XCK / Supply
7 GND Power Ground
8-9 PB6-PB7 I/O Port B / XTAL1-XTAL2
10-17 PB5-PB0 I/O Port B / SPI / OC0A-OC1B
18-19 AVCC, AREF Power Analog supply / ADC reference
20-25 PC0-PC5 I/O Port C / ADC0-5 / SDA/SCL
26-32 PC6-PD5 I/O Port C/D / RESET / OC0A-OC0B
  • Volume production embedded control systems on T&R
  • Consumer electronics requiring 32KB Flash in compact TQFP
  • Industrial automation with USART/RS-485 communication
  • PC peripheral controllers with USB-to-UART bridge
  • Battery-powered sensor nodes with 1.8V low-power modes
Manufacturer Part Number Package Notes
Microchip ATMEGA328PB-AUR TQFP-32 Recommended replacement with 2nd USART/SPI/I2C
Microchip ATMEGA328P-AU TQFP-32 picoPower version, tray packaging
Microchip ATMEGA328P-MUR QFN-28 Smaller 4x4mm QFN package, T&R
ST STM32C031C6T6 LQFP-48 32-bit Cortex-M0+ at 48MHz, value line
TI MSP430G2553IPW28R TSSOP-28 16-bit ultra-low-power, 16KB Flash
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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