ATMEGA324A-AU 8-bit AVR microcontroller with 32KB Flash memory, 2KB SRAM, 1KB EEPROM, operating at 20MHz. Features 32 I/O lines, I²C/SPI/UART interfaces, and 8-channel 10-bit ADC in a 44-TQFP surface mount package.
Mfr Part #:

ATMEGA324A-AU

Available from 1 distributors
Mfr Name: Atmel
Atmel
8-bit AVR microcontroller with 32KB Flash memory, 2KB SRAM, 1KB EEPROM, operating at 20MHz. Features 32 I/O lines, I²C/SPI/UART interfaces, and 8-channel 10-bit ADC in a 44-TQFP surface mount package.
✓ Total Stock: 20,089 pcs

ATMEGA324A-AU Available from 1 distributor

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ATMEGA324A-AU Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Connectivity
Core Processor
Core Size
Data Converters
EEPROM Size
Mounting Type
Number of I
Operating Temperature
Oscillator Type
Peripherals
Program Memory Size
Program Memory Type
RAM Size
SVHC Present
Speed
Supplier Device Package
Voltage

ATMEGA324A-AU Description

Short technical summary and product information.

The ATMEGA324A-AU is a high-performance, low-power 8-bit AVR microcontroller from Microchip Technology. It features an advanced RISC architecture with 131 instructions, most executed in a single clock cycle, achieving up to 20 MIPS throughput at 20MHz. The device integrates 32KB of in-system self-programmable Flash memory, 2KB SRAM, and 1KB EEPROM, with high endurance: 10,000 Flash write/erase cycles and 100,000 EEPROM cycles. Data retention is rated at 20 years at 85°C and 100 years at 25°C.

 

Key peripherals include two 8-bit timers, one 16-bit timer, 6 PWM channels, an 8-channel 10-bit ADC, and multiple serial interfaces (I²C, SPI, UART/USART). The microcontroller also features brown-out detection, power-on reset, and a watchdog timer. It operates from a supply voltage of 1.8V to 5.5V and over a temperature range of -40°C to 85°C.

 

Housed in a 44-TQFP (10x10mm) surface-mount package, the ATMEGA324A-AU is suitable for a wide range of embedded control applications, including industrial automation, sensor interfaces, and consumer electronics. The internal oscillator eliminates the need for external clock components, simplifying design.

ATMEGA324A-AU Quick Information

Product Type: Microcontroller
Series: ATmega324A
Canonical Name: ATMEGA324A-AU
Subcategory: 8-bit Microcontroller

ATMEGA324A-AU Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

ATMEGA324A-AU Features

  • 8-bit AVR core with 20MHz maximum clock speed.
  • 32KB Flash, 2KB SRAM, 1KB EEPROM on-chip memory.
  • 32 general-purpose I/O lines with multiple peripherals.
  • I²C, SPI, and UART/USART serial communication interfaces.
  • 8-channel 10-bit analog-to-digital converter (ADC).

ATMEGA324A-AU Applications

  • Used in industrial automation control systems.
  • Ideal for sensor data acquisition modules.
  • Suitable for motor control with PWM outputs.
  • Applied in battery-powered portable devices.
  • Used in communication interface bridging applications.

ATMEGA324A-AU FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the ATMEGA324A-AU?

The operating voltage range is 1.8V to 5.5V.

What package does the ATMEGA324A-AU come in?

It comes in a 44-TQFP (10x10mm) surface mount package.

What is the operating temperature range?

The operating temperature range is -40°C to 85°C.

Is the ATMEGA324A-AU RoHS compliant?

It is listed as RoHS3 Compliant, but this is unverified and low confidence.

What is the maximum clock speed?

The maximum clock speed is 20MHz.

How much Flash memory does the ATMEGA324A-AU have?

It has 32KB of Flash memory.

How many I/O pins are available?

It has 32 general-purpose I/O lines.

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