Mfr Part #:

ATMEGA2561-16AU

Mfr Name: Atmel

The ATMEGA2561-16AU is an 8-bit AVR microcontroller with 256KB Flash memory, 8KB RAM, and 4KB EEPROM. It operates at 16MHz with a supply voltage of 4.5V to 5.5V and comes in a 64-TQFP package.

✓ Total Stock: 1,614 pcs

ATMEGA2561-16AU Available from 4 distributors

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Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Smaxon Electronics ✓ Non-Authorised Inventory information	1,475 pcs On Request	1475 pcs	On Request	1	On Request	On Request	12+	On Request	On Request
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ATMEGA2561-16AU Description

Short technical summary and product information.

The ATMEGA2561-16AU is an 8-bit AVR microcontroller from Atmel (now Microchip Technology) featuring a high-performance AVR core with 16MHz maximum speed. It offers 256KB of Flash program memory, 8KB of SRAM, and 4KB of EEPROM for data storage. The device includes 54 general-purpose I/O pins and supports multiple communication interfaces including EBI/EMI, I²C, SPI, and UART/USART. Peripherals include brown-out detect/reset, power-on reset, PWM, and watchdog timer. The microcontroller operates from a 4.5V to 5.5V supply voltage and is specified for an industrial temperature range of -40°C to 85°C. It is housed in a 64-TQFP package with a 14x14mm body, suitable for surface-mount assembly. The internal oscillator eliminates the need for external clock components in many applications. This microcontroller is ideal for embedded systems requiring a balance of memory, I/O, and connectivity.

ATMEGA2561-16AU Quick Information

Product Type: Microcontroller

Series: ATmega

Canonical Name: ATMEGA2561-16AU 8-bit AVR Microcontroller

Subcategory: 8-bit Microcontrollers

ATMEGA2561-16AU Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 3 (168 Hours)

REACH Status: REACH Unaffected

ATMEGA2561-16AU Features

8-bit AVR core with 16MHz maximum speed.
256KB Flash program memory.
54 general-purpose I/O pins.
Supports I²C, SPI, UART/USART interfaces.
Operating temperature range -40°C to 85°C.

ATMEGA2561-16AU Applications

Used in industrial control systems.
Suitable for embedded automation applications.
Ideal for IoT edge devices requiring multiple I/O.
Can be used in motor control with PWM peripherals.

ATMEGA2561-16AU FAQs

7 frequently asked questions generated from this part’s specifications.

What is the operating voltage range of the ATMEGA2561-16AU?

The supply voltage range is 4.5V to 5.5V.

What package does the ATMEGA2561-16AU come in?

It comes in a 64-TQFP package (64-TQFP 14x14mm).

What is the operating temperature range?

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

Is the ATMEGA2561-16AU RoHS compliant?

Yes, it is RoHS3 compliant.

How much program memory does the ATMEGA2561-16AU have?

It has 256KB of Flash program memory.

How many I/O pins are available?

There are 54 general-purpose I/O pins.

What communication interfaces are supported?

It supports EBI/EMI, I²C, SPI, and UART/USART.

Category	Microcontrollers
Manufacturer Name	Atmel
Connectivity	EBI/EMI, I²C, SPI, UART/USART
Core Processor	AVR
Core Size	8-Bit
Data Converters	A/D 8x10b
EEPROM Size	4K x 8
Mounting Type	Surface Mount
Number of I	54
Operating Temperature	-40°C ~ 85°C (TA)
Oscillator Type	Internal
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Program Memory Size	256KB (128K x 16)
Program Memory Type	FLASH
RAM Size	8K x 8
SVHC Present	Not Present
Speed	16MHz
Supplier Device Package	64-TQFP (14x14)
Voltage	4.5V ~ 5.5V