ATMEGA2561-16MUR

Product Overview

The ATMEGA2561-16MUR from Microchip Technology is an 8-bit AVR microcontroller intended for embedded control designs. It operates at 16 MHz, provides 256 KB (128K x 16) FLASH program memory, 8K x 8 RAM, and 4K x 8 EEPROM, and is supplied in a 64-QFN (9x9) surface-mount package. The device supports a 4.5 V to 5.5 V supply and an operating temperature range of -40°C to 85°C, with an internal oscillator, 54 I/O, and UART/USART, SPI, I2C, and EBI/EMI connectivity.

Key Features

• 8-bit AVR core operating at 16 MHz
• 256 KB (128K x 16) FLASH program memory
• 8K x 8 RAM and 4K x 8 EEPROM
• 54 I/O pins
• UART/USART, SPI, I2C, and EBI/EMI connectivity
• 8-channel 10-bit analog-to-digital converter
• Brown-out detect/reset, POR, PWM, and WDT peripherals
• 4.5 V to 5.5 V supply and -40°C to 85°C operating temperature
• 64-QFN (9x9) surface-mount package with exposed pad

Applications

• Embedded control systems that require a 4.5 V to 5.5 V microcontroller with 54 I/O pins.
• Sensor acquisition and measurement subsystems using the integrated 8-channel 10-bit analog-to-digital converter.
• Serial communication nodes using UART/USART, SPI, or I2C interfaces.
• Control subsystems that use PWM functionality.
• Embedded devices that retain configuration or calibration data in EEPROM.
• Compact surface-mount embedded assemblies using a 64-QFN package.

Design & Procurement Notes

Designers should allocate PCB area for the 64-VFQFN exposed-pad package and plan for a 4.5 V to 5.5 V supply. The 54 I/O count and integrated UART/USART, SPI, I2C, and EBI/EMI interfaces support connectivity planning. The internal oscillator, 8-channel 10-bit ADC, PWM, POR, brown-out detect/reset, and WDT features can be considered during functional partitioning, while the 256 KB FLASH, 8K x 8 RAM, and 4K x 8 EEPROM sizes should be checked against firmware and data-storage requirements.