ATMEGA64L-8AI Equivalent & Substitute Parts

Part Overview

The ATMEGA64L-8AI is an 8-bit AVR microcontroller from Microchip Technology's ATmega series, featuring 64KB FLASH memory, 4KB RAM, and 2KB EEPROM. This Surface Mount device operates at 8MHz with integrated peripherals including I2C, SPI, UART/USART connectivity, PWM, watchdog timer, and brown-out detection across 53 I/O pins.

The ATMEGA64L-8AI is classified as Obsolete. Locating equivalent substitute parts is necessary for ongoing production support, design updates, and inventory management where original stock becomes unavailable or depleted.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	8MHz
Program Memory Size	64KB (32K x 16)
Program Memory Type	FLASH
RAM Size	4K x 8
EEPROM Size	2K x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.5V
Number of I/O	53
Connectivity	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Data Converters	A/D 8x10b
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	64-TQFP (14x14)

Substitute Part Grouping Explanation

Substitute parts for the ATMEGA64L-8AI are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Core Electrical Parameters:

AVR core processor architecture
8-bit core size
8MHz operating speed
64KB FLASH program memory (32K x 16 organization)
4KB RAM (4K x 8)
2KB EEPROM (2K x 8)
2.7V to 5.5V supply voltage range
53 I/O pins
Identical connectivity: I2C, SPI, UART/USART
Identical peripherals: Brown-out Detect/Reset, POR, PWM, WDT
8x10-bit A/D converters
Internal oscillator

Mechanical Parameters:

Surface Mount mounting type
64-TQFP (14x14) package

The ATMEGA64L-8AU meets all electrical and mechanical substitution criteria and is classified as an Active product with verified programmability status.

Parameter Comparison

Parameter	ATMEGA64L-8AI	ATMEGA64L-8AU
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	64KB (32K x 16)	64KB (32K x 16)
Program Memory Type	FLASH	FLASH
RAM Size	4K x 8	4K x 8
EEPROM Size	2K x 8	2K x 8
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V	2.7V ~ 5.5V
Number of I/O	53	53
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
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
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
ECCN	EAR99	EAR99
HTSUS	8542.31.0001	8542.31.0001

Engineering Selection Recommendations

The ATMEGA64L-8AU is a direct functional equivalent to the ATMEGA64L-8AI with identical electrical specifications and package configuration. Selection between these parts should be based on the following factors:

Product Status: The ATMEGA64L-8AU is classified as Active, ensuring ongoing availability and manufacturer support. The ATMEGA64L-8AI is Obsolete, making the ATMEGA64L-8AU the preferred choice for new designs and long-term production continuity.

Compliance and Certifications: The ATMEGA64L-8AU meets ROHS3 compliance requirements, whereas the ATMEGA64L-8AI is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the ATMEGA64L-8AU is the appropriate selection.

Programmability Verification: The ATMEGA64L-8AU has verified programmability status through DiGi-Electronics, confirming functional compatibility and programming capability.

Packaging: Both parts are supplied in 64-TQFP (14x14) Surface Mount packages with identical MSL ratings of 3 (168 Hours), ensuring equivalent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Are the ATMEGA64L-8AI and ATMEGA64L-8AU pin-compatible?

A: Yes. Both devices use the 64-TQFP (14x14) package with identical pin assignments, I/O configurations (53 pins), and electrical characteristics. Direct PCB substitution is possible without layout modifications.

Q: What are the key differences between these parts?

A: The primary differences are product status and compliance certification. The ATMEGA64L-8AU is Active with ROHS3 compliance, while the ATMEGA64L-8AI is Obsolete and RoHS non-compliant. All functional and electrical parameters are identical.

Q: Can I use ATMEGA64L-8AU in place of ATMEGA64L-8AI in existing designs?

A: Yes. The ATMEGA64L-8AU provides identical functionality, memory configuration, peripheral set, and operating characteristics. No firmware or hardware modifications are required.

Q: What is the significance of the packaging designation difference (Tray vs. unspecified)?

A: The ATMEGA64L-8AU is supplied in Tray packaging, which is standard for active production parts. This does not affect electrical performance or pin compatibility. Tray packaging is suitable for automated assembly processes.

Q: Are there any temperature or voltage operating differences?

A: No. Both parts operate across the identical temperature range (-40°C to 85°C) and voltage supply range (2.7V to 5.5V). All electrical specifications are equivalent.

Q: What is the MSL rating and why does it matter?

A: Both parts have MSL 3 (168 Hours), indicating identical moisture sensitivity levels. This specifies the maximum time the component can be exposed to ambient conditions (30°C, 85% RH) before soldering. Handling and storage procedures are identical for both parts.

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