ATMEGA8515L-8AI Equivalent & Substitute Parts

Part Overview

The ATMEGA8515L-8AI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 8KB of FLASH program memory, 512 bytes of EEPROM, and 512 bytes of RAM. This device operates at 8MHz with a supply voltage range of 2.7V to 5.5V and is housed in a 44-TQFP package. The part is currently classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	8MHz
Program Memory Size	8KB (4K x 16)
Program Memory Type	FLASH
EEPROM Size	512 x 8
RAM Size	512 x 8
Number of I/O	35
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	44-TQFP (10x10)
Mounting Type	Surface Mount
Connectivity	EBI/EMI, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT

Substitute Part Grouping Explanation

Substitution of the ATMEGA8515L-8AI is determined by strict equivalence across the following critical parameters:

Core Architecture: AVR processor family
Memory Configuration: 8KB FLASH, 512 x 8 EEPROM, 512 x 8 RAM
Operating Frequency: 8MHz
I/O Count: 35 pins
Package Format: 44-TQFP (10x10) surface mount
Voltage Range: 2.7V ~ 5.5V
Temperature Range: -40°C ~ 85°C
Connectivity & Peripherals: EBI/EMI, SPI, UART/USART, Brown-out Detect/Reset, POR, PWM, WDT

The ATMEGA8515L-8AU meets all electrical and mechanical specifications required for direct substitution. Differences are limited to packaging format (Tray vs. standard packaging) and product lifecycle status (Active vs. Obsolete).

Parameter Comparison

Parameter	ATMEGA8515L-8AI	ATMEGA8515L-8AU	Match
Manufacturer	Microchip Technology	Microchip Technology	✓
Core Processor	AVR	AVR	✓
Core Size	8-Bit	8-Bit	✓
Speed	8MHz	8MHz	✓
Program Memory Size	8KB (4K x 16)	8KB (4K x 16)	✓
Program Memory Type	FLASH	FLASH	✓
EEPROM Size	512 x 8	512 x 8	✓
RAM Size	512 x 8	512 x 8	✓
Number of I/O	35	35	✓
Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V	2.7V ~ 5.5V	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
Package / Case	44-TQFP (10x10)	44-TQFP (10x10)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Connectivity	EBI/EMI, SPI, UART/USART	EBI/EMI, SPI, UART/USART	✓
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	✓
Product Status	Obsolete	Active	Different
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Different

Engineering Selection Recommendations

The ATMEGA8515L-8AU is a direct functional equivalent to the ATMEGA8515L-8AI. All electrical specifications, memory configurations, I/O characteristics, and peripheral functions are identical. The substitute part is currently in active production status, whereas the original part is obsolete.

The ATMEGA8515L-8AU carries ROHS3 compliance certification, whereas the ATMEGA8515L-8AI is RoHS non-compliant. This distinction is significant for applications subject to RoHS regulatory requirements. Both parts are REACH Unaffected and classified under ECCN EAR99.

Selection between these parts should be based on regulatory compliance requirements, supply chain availability, and packaging format preferences (Tray packaging for the substitute).

Frequently Asked Questions (FAQ)

Q: Can the ATMEGA8515L-8AU be used as a direct replacement for the ATMEGA8515L-8AI?

A: Yes. All electrical parameters, memory specifications, I/O configuration, operating frequency, voltage range, temperature range, and peripheral functions are identical. The parts are pin-compatible in the 44-TQFP package.

Q: What is the difference between these two part numbers?

A: The primary differences are product lifecycle status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. RoHS non-compliant). Packaging format also differs (Tray vs. standard packaging). Electrical and functional specifications are equivalent.

Q: Are there any compatibility concerns with PCB layout or schematic design?

A: No. Both parts use the identical 44-TQFP (10x10) surface mount package with 35 I/O pins. PCB footprints, pin assignments, and schematic symbols are interchangeable.

Q: Which part should be selected for new designs?

A: The ATMEGA8515L-8AU is recommended for new designs due to active production status and ROHS3 compliance certification. The ATMEGA8515L-8AI is obsolete and should be reserved for legacy system maintenance only.

Q: Are there supply chain differences between these parts?

A: The ATMEGA8515L-8AU has significantly higher inventory availability (17,839 Pcs) compared to the ATMEGA8515L-8AI (2,983 Pcs), reflecting its active production status.

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