ATMEGA128L-8AI Equivalent & Substitute Parts

Part Overview

The ATMEGA128L-8AI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 128KB of FLASH program memory, 4KB EEPROM, and 4KB RAM. This device operates at 8MHz with a supply voltage range of 2.7V to 5.5V and is housed in a 64-TQFP package. The part is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity.

Substiute Parts

ATMEGA128L-8AI

Microchip TechnologyIn Stock: 2806ATMEGA128L-8AI Datasheet

Current PartRFQ

ATMEGA128L-8AU

Microchip TechnologyIn Stock: 1597ATMEGA128L-8AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATMEGA128L-8AI is determined by strict equivalence across the following critical parameters:

• Core Architecture: AVR processor family
• Memory Configuration: 128KB FLASH, 4KB EEPROM, 4KB RAM
• Operating Frequency: 8MHz
• Supply Voltage Range: 2.7V ~ 5.5V
• I/O Count: 53 pins
• Package Format: 64-TQFP (14x14)
• Connectivity Interfaces: EBI/EMI, I2C, SPI, UART/USART
• Peripheral Set: Brown-out Detect/Reset, POR, PWM, WDT
• Data Conversion: A/D 8x10b

The ATMEGA128L-8AU meets all these criteria and qualifies as a direct substitute. The primary distinction between these parts is packaging format (tape and reel versus bulk) and product status (active versus obsolete).

Parameter Comparison

Engineering Selection Recommendations

The ATMEGA128L-8AU is the appropriate substitute for the obsolete ATMEGA128L-8AI. Both devices are electrically and functionally identical across all specified parameters. The ATMEGA128L-8AU offers the additional advantage of active product status, ensuring continued availability and support from Microchip Technology.

The ATMEGA128L-8AU carries ROHS3 compliance, whereas the ATMEGA128L-8AI is RoHS non-compliant. This distinction is significant for applications subject to RoHS regulations. Both parts maintain identical REACH status (REACH Unaffected) and ECCN classification (EAR99).

Packaging format differs between the two parts: the ATMEGA128L-8AI is supplied in tube packaging, while the ATMEGA128L-8AU is supplied in tray packaging. This distinction affects handling, storage, and automated assembly processes but does not impact electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Are the ATMEGA128L-8AI and ATMEGA128L-8AU pin-compatible?

A: Yes. Both devices use the 64-TQFP (14x14) package with identical pinout, electrical characteristics, and functional specifications. Direct substitution is possible without circuit modification.

Q: What is the difference between the ATMEGA128L-8AI and ATMEGA128L-8AU?

A: The primary differences are product status (obsolete versus active), RoHS compliance (non-compliant versus ROHS3 compliant), and packaging format (tube versus tray). All electrical and functional parameters are identical.

Q: Can I use the ATMEGA128L-8AU in a design originally specified for the ATMEGA128L-8AI?

A: Yes. The ATMEGA128L-8AU is a direct functional and electrical equivalent. No design changes are required. The improved RoHS compliance of the ATMEGA128L-8AU may be beneficial for regulatory compliance.

Q: Does the packaging format affect circuit performance?

A: No. Packaging format (tube versus tray) affects only handling, storage, and assembly logistics. Electrical performance and functionality remain unchanged.

Q: Are there any supply voltage or temperature rating differences?

A: No. Both parts operate across the identical supply voltage range (2.7V ~ 5.5V) and temperature range (-40°C ~ 85°C TA).

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

A: Both the ATMEGA128L-8AI and ATMEGA128L-8AU carry an MSL rating of 3 (168 Hours), indicating identical moisture handling requirements.