ATMEGA6490V-8AI Equivalent & Substitute Parts

Part Overview

The ATMEGA6490V-8AI is an 8-bit AVR microcontroller from Microchip Technology's ATmega series, featuring 64KB FLASH memory, 4KB RAM, and 2KB EEPROM. Designed for embedded applications requiring moderate processing capability and integrated peripherals including SPI, UART/USART, and USI connectivity. The device operates at 8MHz with a supply voltage range of 1.8V to 5.5V and is housed in a 100-TQFP package.

The ATMEGA6490V-8AI carries an Obsolete product status, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement continuity.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	8MHz
Program Memory Size	64KB (32K x 16)
Program Memory Type	FLASH
EEPROM Size	2K x 8
RAM Size	4K x 8
Voltage Supply (Vcc/Vdd)	1.8V ~ 5.5V
Number of I/O	68
Data Converters	A/D 8x10b
Connectivity	SPI, UART/USART, USI
Peripherals	Brown-out Detect/Reset, LCD, POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	100-TQFP (14x14)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the ATMEGA6490V-8AI is determined by strict equivalence across the following critical parameters:

Core architecture and instruction set compatibility (AVR 8-bit processor), identical memory configuration (64KB FLASH, 4KB RAM, 2KB EEPROM), matching clock speed (8MHz), identical I/O count (68 pins), equivalent peripheral set (SPI, UART/USART, USI, Brown-out Detect/Reset, LCD, POR, PWM, WDT), matching supply voltage range (1.8V ~ 5.5V), identical package form factor (100-TQFP 14x14), and compatible operating temperature range (-40°C ~ 85°C).

The ATMEGA6490V-8AU meets all substitution criteria. The primary distinction is packaging format (Tray versus unspecified for the main part) and product status transition (Active versus Obsolete), with the substitute offering improved RoHS3 compliance and current market availability.

Parameter Comparison

Parameter	ATMEGA6490V-8AI	ATMEGA6490V-8AU	Match
Manufacturer	Microchip Technology	Microchip Technology	✓
Core Processor	AVR	AVR	✓
Core Size	8-Bit	8-Bit	✓
Speed	8MHz	8MHz	✓
Program Memory Size	64KB (32K x 16)	64KB (32K x 16)	✓
Program Memory Type	FLASH	FLASH	✓
EEPROM Size	2K x 8	2K x 8	✓
RAM Size	4K x 8	4K x 8	✓
Voltage Supply (Vcc/Vdd)	1.8V ~ 5.5V	1.8V ~ 5.5V	✓
Number of I/O	68	68	✓
Data Converters	A/D 8x10b	A/D 8x10b	✓
Connectivity	SPI, UART/USART, USI	SPI, UART/USART, USI	✓
Peripherals	Brown-out Detect/Reset, LCD, POR, PWM, WDT	Brown-out Detect/Reset, LCD, POR, PWM, WDT	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
Package / Case	100-TQFP (14x14)	100-TQFP (14x14)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Product Status	Obsolete	Active	Functional Equivalence
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Improved Compliance
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	✓
REACH Status	REACH Unaffected	REACH Unaffected	✓

Engineering Selection Recommendations

The ATMEGA6490V-8AU is a direct functional equivalent to the ATMEGA6490V-8AI across all electrical and mechanical parameters. Selection between these parts should be based on the following criteria:

For new designs or system updates, the ATMEGA6490V-8AU is the preferred choice due to Active product status, ensuring long-term availability and supply chain stability. The ATMEGA6490V-8AU also provides ROHS3 compliance, meeting current environmental and regulatory requirements for commercial and industrial applications.

For legacy system maintenance or repair where original part specifications must be preserved, the ATMEGA6490V-8AI remains functionally compatible, though procurement may be constrained due to Obsolete status.

Both parts share identical MSL ratings (3, 168 Hours), REACH status (Unaffected), and ECCN classification (EAR99), ensuring equivalent handling and regulatory treatment in supply chain operations.

Frequently Asked Questions (FAQ)

Q: Can ATMEGA6490V-8AU be used as a direct replacement for ATMEGA6490V-8AI in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all functional parameters including processor architecture, memory configuration, I/O count, peripheral set, voltage supply range, and package form factor. No design modifications are required.

Q: What is the difference between ATMEGA6490V-8AI and ATMEGA6490V-8AU?

A: The primary differences are product status (Obsolete versus Active), packaging format (unspecified versus Tray), and RoHS compliance (non-compliant versus ROHS3 Compliant). Functional performance and electrical specifications are identical.

Q: Are there any pin compatibility concerns when substituting these parts?

A: No. Both parts use the identical 100-TQFP (14x14) package with 68 I/O pins in the same configuration. PCB layout and footprint remain unchanged.

Q: Which part should be selected for new production?

A: The ATMEGA6490V-8AU should be selected for new designs and production runs. Active product status ensures sustained availability, and ROHS3 compliance aligns with current regulatory requirements.

Q: Are the memory specifications identical between these parts?

A: Yes. Both parts feature 64KB FLASH (32K x 16), 4KB RAM (4K x 8), and 2KB EEPROM (2K x 8). Program memory organization and access characteristics are identical.

Q: Do these parts have the same operating temperature range?

A: Yes. Both parts operate across -40°C to 85°C (TA), supporting equivalent thermal environments and application requirements.

Q: What is the significance of the MSL rating for these parts?

A: Both parts carry MSL 3 (168 Hours), indicating identical moisture sensitivity and requiring equivalent storage, handling, and reflow procedures during assembly.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message