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Product attributes Property Value
Manufacturer Microchip Technology
Product Series megaAVR® 0, Functional Safety (FuSa)
Packaging Tray |
Core Processor AVR
Core Size 8-Bit
Speed 20MHz
Connectivity I2C, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 41
Program Memory Size 48KB (24K x 16)
Program Memory Type FLASH
EEPROM Size 256 x 8
RAM Size 6K x 8
Voltage - Supply (Vcc/Vdd) 1.8V ~ 5.5V
Data Converters A/D 16x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 48-QFN (7x7)
Package / Case 48-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ATMEGA4809-MU is a high-performance 8-bit AVR microcontroller from Microchip Technology, offering a rich feature set for advanced embedded applications. It operates from 1.8V to 5.5V and runs at up to 20MHz, providing efficient processing for a wide range of tasks. With 48KB Flash and 6KB RAM, it offers substantial memory for complex firmware and data handling. The 48-VFQFN package provides ample I/O pins for interfacing with peripherals. Integrated features include brown-out detect/reset, power-on reset, PWM, and watchdog timer, ensuring reliable operation. Its temperature range of -40°C to 85°C makes it suitable for industrial and commercial environments.

  • Large 48KB Flash: Enables complex applications with multiple features and over-the-air update capability.
  • 6KB RAM: Supports dynamic data structures and larger buffers, improving performance.
  • High I/O count (48-VFQFN): Allows connection to many peripherals without external expanders.
  • AVR core efficiency: Executes most instructions in a single clock cycle, maximizing throughput at 20MHz.
  • Wide voltage range: Flexible power supply options, from battery to regulated 5V.

Advanced IoT Edge Nodes

With 48KB Flash and 6KB RAM, the ATMEGA4809-MU can run lightweight RTOS and handle MQTT/CoAP protocols, making it ideal for smart home and industrial IoT devices.

Robotics Controllers

Its 48-pin package offers numerous GPIOs for motor drivers, encoders, and sensors, while 20MHz speed supports real-time kinematics calculations.

Data Logging Systems

Large RAM allows buffering of sensor data before writing to SD cards or transmitting over wireless links, useful in environmental monitoring.

Human-Machine Interfaces (HMI)

With many I/O pins, it can drive LCDs, keypads, and LEDs, providing a responsive user interface for industrial equipment.

Smart Agriculture

Low voltage operation and robust features enable battery-powered soil sensors and irrigation controllers that operate reliably in outdoor conditions.

Educational Platforms

Its AVR architecture is widely supported, making it a great choice for prototyping and teaching embedded systems.

Q: What is the core architecture?
A: It uses the AVR core, which is an 8-bit RISC architecture known for efficiency.
Q: What is the supply voltage range?
A: It operates from 1.8V to 5.5V, supporting a wide range of power supplies.
Q: What is the maximum clock speed?
A: The ATMEGA4809-MU runs at up to 20MHz, providing balanced performance.
Q: How much memory does it have?
A: It features 48KB Flash and 6KB RAM, offering generous resources for complex applications.
Q: What package is available?
A: It comes in a 48-VFQFN exposed pad package, providing many I/O pins.
Base Product Number : ATMEGA4809
20MHz 48-VFQFN 48KB Flash 6KB RAM 8-bit MCU ATMEGA AVR HMI IoT robotics
Q: What is the core architecture?
A: It uses the AVR core, which is an 8-bit RISC architecture known for efficiency.
Q: What is the supply voltage range?
A: It operates from 1.8V to 5.5V, supporting a wide range of power supplies.
Q: What is the maximum clock speed?
A: The ATMEGA4809-MU runs at up to 20MHz, providing balanced performance.
Q: How much memory does it have?
A: It features 48KB Flash and 6KB RAM, offering generous resources for complex applications.
Q: What package is available?
A: It comes in a 48-VFQFN exposed pad package, providing many I/O pins.