ATMEGA2561V-8AI Equivalent & Substitute Parts

Part Overview

The ATMEGA2561V-8AI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 256KB FLASH memory, 8KB RAM, and 4KB EEPROM. This device integrates 54 I/O pins, multiple communication interfaces (SPI, I2C, UART/USART), and analog-to-digital conversion capabilities in a 64-TQFP surface mount package.

The ATMEGA2561V-8AI carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this microcontroller architecture.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	8MHz
Program Memory Size	256KB (128K x 16)
Program Memory Type	FLASH
EEPROM Size	4K x 8
RAM Size	8K x 8
Number of I/O	54
Voltage - Supply (Vcc/Vdd)	1.8V ~ 5.5V
Data Converters	A/D 8x10b
Connectivity	EBI/EMI, I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	64-TQFP (14x14)

Substitute Part Grouping Explanation

Substitution eligibility for the ATMEGA2561V-8AI is determined by strict equivalence across the following critical parameters:

Core Architecture: AVR processor family
Memory Configuration: 256KB FLASH, 8KB RAM, 4KB EEPROM
I/O Count: 54 pins
Operating Voltage: 1.8V ~ 5.5V supply range
Package Type: 64-TQFP (14x14) surface mount
Connectivity Interfaces: EBI/EMI, I2C, SPI, UART/USART
Peripheral Set: Brown-out Detect/Reset, POR, PWM, WDT
Data Conversion: A/D 8x10b
Operating Temperature Range: -40°C ~ 85°C

The ATMEGA2561V-8AU qualifies as a direct substitute based on identical electrical specifications, memory architecture, I/O configuration, and package geometry. The primary distinction lies in product status and packaging format.

Parameter Comparison

Parameter	ATMEGA2561V-8AI (Main Part)	ATMEGA2561V-8AU (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Series	AVR® ATmega	AVR® ATmega
Core Processor	AVR	AVR
Core Size	8-Bit	8-Bit
Speed	8MHz	8MHz
Program Memory Size	256KB (128K x 16)	256KB (128K x 16)
EEPROM Size	4K x 8	4K x 8
RAM Size	8K x 8	8K x 8
Number of I/O	54	54
Voltage - Supply (Vcc/Vdd)	1.8V ~ 5.5V	1.8V ~ 5.5V
Data Converters	A/D 8x10b	A/D 8x10b
Connectivity	EBI/EMI, I2C, SPI, UART/USART	EBI/EMI, I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	64-TQFP (14x14)	64-TQFP (14x14)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The ATMEGA2561V-8AU is the qualified substitute for the ATMEGA2561V-8AI based on the following engineering criteria:

Product Status: The ATMEGA2561V-8AU maintains Active product status, ensuring continued manufacturer support, availability, and long-term supply chain viability compared to the Obsolete ATMEGA2561V-8AI.

Regulatory Compliance: The ATMEGA2561V-8AU is ROHS3 compliant, meeting current environmental and hazardous substance restrictions. The ATMEGA2561V-8AI is RoHS non-compliant, which may present compliance challenges for new designs or applications subject to RoHS regulations.

Electrical and Functional Equivalence: Both devices are electrically and functionally identical across all specified parameters, including memory architecture, I/O configuration, operating voltage range, and peripheral functionality.

Package Compatibility: Both devices utilize identical 64-TQFP (14x14) surface mount packaging, ensuring direct PCB layout compatibility without redesign requirements.

Inventory Availability: The ATMEGA2561V-8AU demonstrates significantly higher inventory availability (3350 Pcs) compared to the ATMEGA2561V-8AI (840 Pcs), supporting production continuity and lead time reduction.

Frequently Asked Questions (FAQ)

Q: Are the ATMEGA2561V-8AI and ATMEGA2561V-8AU pin-compatible?

A: Yes. Both devices utilize the 64-TQFP (14x14) package with identical pin assignments, electrical characteristics, and I/O configurations. Direct PCB substitution is possible without layout modifications.

Q: What is the primary difference between these two parts?

A: The ATMEGA2561V-8AU is the Active production variant with ROHS3 compliance, while the ATMEGA2561V-8AI is Obsolete and RoHS non-compliant. Electrical and functional specifications are identical.

Q: Can I use the ATMEGA2561V-8AU as a drop-in replacement for the ATMEGA2561V-8AI?

A: Yes. The ATMEGA2561V-8AU is a direct functional and electrical equivalent. No firmware modifications, circuit redesign, or PCB layout changes are required for substitution.

Q: Does the packaging format differ between these parts?

A: The ATMEGA2561V-8AI is supplied in standard packaging, while the ATMEGA2561V-8AU is supplied in Tray packaging. Both contain identical die and electrical specifications. Tray packaging is standard for Active production parts.

Q: Are there any temperature or voltage operating differences?

A: No. Both devices operate across the identical voltage range (1.8V ~ 5.5V) and temperature range (-40°C ~ 85°C). All electrical specifications are equivalent.

Q: What is the Moisture Sensitivity Level (MSL) for both parts?

A: Both the ATMEGA2561V-8AI and ATMEGA2561V-8AU carry MSL 3 (168 Hours) classification, requiring identical moisture control and handling procedures during storage and assembly.

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