Atmega2560 16AU Mega TQFP Atmel Microcontroller SMD IC

Specifications

• Microcontroller Architecture: 8-Bit AVR RISC
• Package Type: TQFP-100 (Thin Quad Flat Package)
• Operating Voltage: 4.5V to 5.5V (Standard 5V Logic)
• Maximum Clock Frequency: 16 MHz
• Flash Memory: 256 KB (of which 8 KB is used by bootloader)
• SRAM: 8 KB
• EEPROM: 4 KB
• Total I/O Pins: 86 Programmable GPIOs
• Analog Input Channels: 16 x 10-bit ADC
• Hardware Serial Ports (UART): 4
• PWM Channels: 15
• SPI / I2C (TWI) Interfaces: Yes (Hardware Level)

Applications

• Custom 3D Printer Controllers: The core processing chip behind RAMPS and custom RepRap motherboards.
• Industrial Automation: Build robust PLCs and relay controllers requiring massive I/O counts.
• Advanced Robotics: Perfect for hexapods, robotic arms, and complex rovers needing multiple hardware serial ports for GPS, Bluetooth, and telemetry simultaneously.
• Data Logging Stations: Utilize the large SRAM and EEPROM for buffering environmental data across dozens of sensors.

Unlock New Capabilities

• Past Projects: If you've mastered basic custom PCBs using the ATmega328P (Uno chip) or ATmega32U4 but are constantly fighting pin limitations or memory overflow...
• Feature Upgrade: The ATmega2560 unlocks heavy-lifting capabilities. It provides 4 dedicated hardware UARTs (no more messy SoftwareSerial!), massive 256KB flash for complex graphical display menus, and 86 pins to control massive LED matrices or sensor arrays.
• Effort & Requirements: Advanced Level. You will need SMD soldering skills (hot air or drag soldering) for the TQFP-100 package, a 16MHz crystal oscillator, 22pF capacitors, and an ISP programmer (or another Arduino) to burn the initial bootloader.

Package Includes:

• 1 x Atmega2560 16AU Mega TQFP Atmel Microcontroller SMD IC

Frequently Asked Questions (Technical FAQ)

• What is the package type of this ATmega2560 IC?
  It is a TQFP-100 (Thin Quad Flat Package) surface-mount device with 100 pins.
• Can I replace a blown chip on my Arduino Mega 2560 with this?
  Yes, this is the exact replacement IC. You will need hot-air rework skills to swap it and an ISP programmer to flash the bootloader afterward.
• Does this chip come with the Arduino bootloader pre-installed?
  No, this is a factory-blank Atmel IC. You must burn the bootloader yourself using an ISP programmer (like USBasp) or another Arduino acting as an ISP.
• What is the operating voltage of the ATmega2560-16AU?
  The recommended operating voltage is 4.5V to 5.5V for 16MHz operation.
• How many hardware serial ports (UART) does it have?
  It features 4 independent hardware UART ports, perfect for handling multiple serial devices like GPS, Bluetooth, and GSM simultaneously.
• How much flash memory does this chip have?
  It has 256 KB of flash memory. If using the standard Arduino bootloader, about 8 KB is reserved, leaving 248 KB for your code.
• Do I need an external crystal to use this chip?
  While it has an internal 8MHz oscillator, you must use an external 16MHz crystal (with 22pF capacitors) if you want it to run at standard Arduino Mega speeds and timing.
• How many GPIO pins are available?
  The chip has a total of 86 programmable General Purpose Input/Output pins.
• Are the pins 5V tolerant?
  Yes, the logic level is natively 5V.
• How many Analog to Digital (ADC) channels does it have?
  It features 16 channels of 10-bit ADC.
• Can I program this chip in C or C++ without the Arduino IDE?
  Absolutely. You can use Atmel Studio (Microchip Studio), avr-gcc, and program it directly via the ICSP headers using a compatible programmer.
• What is the maximum current per I/O pin?
  The absolute maximum DC current per I/O pin is 40mA, but continuous draw should be kept around 20mA. The total current for all pins combined should not exceed 200mA.
• How many PWM outputs does the ATmega2560 have?
  It has 15 hardware PWM channels available.
• Is this IC compatible with 3.3V I2C sensors?
  Since the IC runs at 5V, its I2C lines will be 5V. You must use a bi-directional logic level converter to safely connect 3.3V I2C sensors.
• Does it support SPI communication?
  Yes, it has a dedicated hardware SPI interface.
• What is the spacing (pitch) between the pins on the TQFP-100 package?
  The pin pitch is 0.50 mm, requiring fine-pitch SMD soldering techniques.
• Why do I need decoupling capacitors?
  You must place 100nF ceramic capacitors as close to every VCC/GND pair as possible to ensure stable power delivery and prevent random resets.