ATMEGA329V-8AI Equivalent & Substitute Parts Engineering Reference

Part Overview

The ATMEGA329V-8AI is an 8-bit AVR® ATmega microcontroller IC from Microchip Technology, featuring 32KB Flash memory and a 64-TQFP (14x14 mm) surface mount package. It operates from 1.8V to 5.5V, supporting various peripherals including SPI, UART/USART, and LCD controller. The part status is Obsolete, making it necessary to identify strictly equivalent alternatives to ensure continuity in design, manufacturing, or maintenance where direct replacement is required.

Key Parameters

Parameter	ATMEGA329V-8AI Specification
Manufacturer	Microchip Technology
Category	Embedded
Series	AVR® ATmega
Core Processor	AVR
Core Size	8-Bit
Speed	8MHz
Connectivity	SPI, UART/USART, USI
Peripherals	Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number of I/O	54
Program Memory Size	32KB (16K x 16)
Program Memory Type	FLASH
EEPROM Size	1K x 8
RAM Size	2K x 8
Voltage - Supply (Vcc/Vdd)	1.8V ~ 5.5V
Data Converters	A/D 8x10b
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Supplier Device Package	64-TQFP (14x14)
Package / Case	64-TQFP
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.31.0015

Substitute Part Grouping Explanation

Substitute parts are evaluated based on strict equivalence of the following key electrical and mechanical parameters: manufacturer, series, core processor, core size, speed, connectivity, peripherals, number of I/O, program memory size and type, EEPROM size, RAM size, supply voltage, data converters, oscillator type, operating temperature range, mounting type, package, and compliance certifications (RoHS, REACH, MSL, ECCN, HTSUS). Only parts matching these criteria without deviation are considered for direct substitution.

Parameter Comparison

Parameter	ATMEGA329V-8AI (Main)	ATMEGA329V-8AU (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Category	Embedded	Embedded
Series	AVR® ATmega	AVR® ATmega
Core Processor	AVR	AVR
Core Size	8-Bit	8-Bit
Speed	8MHz	8MHz
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
Number of I/O	54	54
Program Memory Size	32KB (16K x 16)	32KB (16K x 16)
Program Memory Type	FLASH	FLASH
EEPROM Size	1K x 8	1K x 8
RAM Size	2K x 8	2K x 8
Voltage - Supply (Vcc/Vdd)	1.8V ~ 5.5V	1.8V ~ 5.5V
Data Converters	A/D 8x10b	A/D 8x10b
Oscillator Type	Internal	Internal
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Supplier Device Package	64-TQFP (14x14)	64-TQFP (14x14)
Package / Case	64-TQFP	64-TQFP
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8542.31.0015	8542.31.0001

Engineering Selection Recommendations

The ATMEGA329V-8AI is obsolete and RoHS non-compliant. The direct substitute, ATMEGA329V-8AU, is active and ROHS3 compliant, with identical electrical and mechanical parameters. REACH status and MSL remain unaffected and identical between parts. Selection should consider product status, regulatory compliance, and certification alignment, based solely on the provided data.

Frequently Asked Questions (FAQ)

Q1: What makes the ATMEGA329V-8AU a direct substitute for the ATMEGA329V-8AI?
A1: The ATMEGA329V-8AU matches all functional, electrical, and packaging parameters specified for the ATMEGA329V-8AI.

Q2: Are there differences in package or mounting options when using these equivalents?
A2: Both parts use the 64-TQFP (14x14 mm) surface mount package, ensuring mechanical compatibility.

Q3: How does RoHS compliance differ between the ATMEGA329V-8AI and ATMEGA329V-8AU?
A3: The ATMEGA329V-8AI is RoHS non-compliant, while the ATMEGA329V-8AU is ROHS3 compliant.

Q4: Is there any change in supply voltage or operational speed in the substitute?
A4: No. Both parts specify a supply voltage range of 1.8V ~ 5.5V and an operating speed of 8MHz.

Q5: Are inventory and product status relevant when selecting a substitute?
A5: Yes. The main part is obsolete, while the substitute is active, which can affect sourcing and design continuity decisions.

Q6: Are there differences in compliance with REACH or Moisture Sensitivity Level (MSL)?
A6: Both parts are REACH Unaffected and rated MSL 3 (168 Hours).

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