AT90S8515-8AI Equivalent & Substitute Parts

Part Overview

The AT90S8515-8AI is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 8KB FLASH program memory, 512 bytes EEPROM, and 512 bytes RAM. This device operates at 8MHz with integrated peripherals including SPI, UART/USART connectivity, PWM, watchdog timer, and brown-out detection. The AT90S8515-8AI is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

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	32
Voltage Supply (Vcc/Vdd)	4V ~ 6V
Connectivity	SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	-40°C ~ 85°C
Package / Case	44-TQFP (10x10)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the AT90S8515-8AI is determined by the following critical parameters:

Core Architecture: AVR processor family compatibility
Memory Configuration: 8KB FLASH, 512 bytes EEPROM, 512 bytes RAM
Operating Frequency: 8MHz operation
Package Format: 44-TQFP (10x10) surface mount
Peripheral Set: SPI, UART/USART, PWM, watchdog timer, brown-out detection
I/O Count: Minimum 32 I/O pins
Operating Temperature Range: -40°C ~ 85°C
Supply Voltage Range: Compatible voltage operation

The ATMEGA8515L-8AU meets all substitution criteria as an active-status AVR microcontroller with identical memory specifications, package format, and peripheral configuration.

Parameter Comparison

Parameter	AT90S8515-8AI	ATMEGA8515L-8AU	Compatibility
Manufacturer	Microchip Technology	Microchip Technology	Match
Core Processor	AVR	AVR	Match
Core Size	8-Bit	8-Bit	Match
Speed	8MHz	8MHz	Match
Program Memory Size	8KB (4K x 16)	8KB (4K x 16)	Match
Program Memory Type	FLASH	FLASH	Match
EEPROM Size	512 x 8	512 x 8	Match
RAM Size	512 x 8	512 x 8	Match
Number of I/O	32	35	Compatible (Substitute exceeds minimum)
Connectivity	SPI, UART/USART	EBI/EMI, SPI, UART/USART	Compatible (Substitute includes additional connectivity)
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	Match
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C (TA)	Match
Voltage Supply (Vcc/Vdd)	4V ~ 6V	2.7V ~ 5.5V	Compatible (Substitute supports wider range)
Package / Case	44-TQFP (10x10)	44-TQFP (10x10)	Match
Mounting Type	Surface Mount	Surface Mount	Match
Product Status	Obsolete	Active	Substitute is actively manufactured
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute meets current compliance

Engineering Selection Recommendations

The ATMEGA8515L-8AU is the direct substitute for the obsolete AT90S8515-8AI based on the following factors:

Functional Equivalence: Both devices share identical core architecture, memory configuration, operating frequency, and peripheral set. The ATMEGA8515L-8AU provides 35 I/O pins versus 32 on the original part, offering additional I/O capability without reducing functionality.

Package Compatibility: Both parts use the 44-TQFP (10x10) surface mount package, enabling direct PCB layout compatibility.

Supply Voltage: The ATMEGA8515L-8AU operates across 2.7V to 5.5V, encompassing the original part's 4V to 6V range and providing greater design flexibility for lower-voltage applications.

Product Status and Compliance: The ATMEGA8515L-8AU is actively manufactured by Microchip Technology and meets ROHS3 compliance requirements, addressing the obsolescence and compliance limitations of the AT90S8515-8AI.

Availability: The ATMEGA8515L-8AU maintains substantial inventory availability, ensuring reliable procurement for production and support applications.

Frequently Asked Questions (FAQ)

Q: Can the ATMEGA8515L-8AU directly replace the AT90S8515-8AI in existing designs?

A: Yes. Both devices share identical pinout, package format, memory specifications, and peripheral configuration. The ATMEGA8515L-8AU operates within the original part's voltage range and maintains full functional compatibility.

Q: What are the differences between these two parts?

A: The ATMEGA8515L-8AU provides three additional I/O pins (35 versus 32), supports a wider supply voltage range (2.7V to 5.5V versus 4V to 6V), includes EBI/EMI connectivity in addition to SPI and UART/USART, and meets current RoHS3 compliance standards. The original AT90S8515-8AI is obsolete.

Q: Are there any firmware or software modifications required for substitution?

A: Firmware compatibility is determined by application-specific code. Both devices use the same AVR instruction set and core architecture. Applications utilizing only the common peripheral set require no modification.

Q: Does the 44-TQFP package remain the same?

A: Yes. Both parts use the 44-TQFP (10x10) surface mount package with identical pinout and mechanical dimensions.

Q: What is the supply voltage operating range for each part?

A: The AT90S8515-8AI operates at 4V to 6V. The ATMEGA8515L-8AU operates at 2.7V to 5.5V, providing compatibility with the original specification and additional flexibility for lower-voltage system designs.

Q: Is the ATMEGA8515L-8AU currently available?

A: Yes. The ATMEGA8515L-8AU is actively manufactured and maintains substantial inventory availability through authorized distributors.

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