AT90CAN128-16AI Equivalent & Substitute Parts

Part Overview

The AT90CAN128-16AI is an 8-bit AVR microcontroller from Microchip Technology's AVR 90CAN series, featuring 128KB FLASH memory, integrated CAN bus connectivity, and comprehensive peripheral support. This device is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and production continuity. The substitute parts listed maintain identical electrical and mechanical specifications while offering improved product status and compliance certifications.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Core Processor	AVR
Core Size	8-Bit
Speed	16MHz
Program Memory Size	128KB (128K x 8) FLASH
EEPROM Size	4K x 8
RAM Size	4K x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.5V
Number of I/O	53
Connectivity	CANbus, EBI/EMI, I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Data Converters	A/D 8x10b
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	64-TQFP (14x14)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the AT90CAN128-16AI is determined by strict equivalence across the following critical parameters:

Core Architecture & Performance: Identical AVR 8-bit processor, 16MHz clock speed, and instruction set compatibility
Memory Configuration: Matching 128KB FLASH, 4KB EEPROM, and 4KB RAM specifications
Electrical Characteristics: Identical supply voltage range (2.7V ~ 5.5V) and operating temperature range (-40°C ~ 85°C)
Peripheral Set: Complete functional equivalence in CANbus, I2C, SPI, UART/USART, and analog-to-digital conversion capabilities
Package Specification: Identical 64-TQFP (14x14) surface mount package with 53 I/O pins
Compliance & Certifications: RoHS3 compliance and REACH unaffected status for substitute parts

The substitute parts AT90CAN128-16AU and AT90CAN128-16AUR differ only in packaging format (Tray vs. Cut Tape & Digi-Reel) and product status (Active vs. Obsolete), with no functional or electrical differences.

Parameter Comparison

Parameter	AT90CAN128-16AI (Main)	AT90CAN128-16AU (Substitute)	AT90CAN128-16AUR (Substitute)
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology
Product Status	Obsolete	Active	Active
Core Processor	AVR	AVR	AVR
Core Size	8-Bit	8-Bit	8-Bit
Speed	16MHz	16MHz	16MHz
Program Memory	128KB FLASH	128KB FLASH	128KB FLASH
EEPROM Size	4K x 8	4K x 8	4K x 8
RAM Size	4K x 8	4K x 8	4K x 8
Voltage Supply	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V
Number of I/O	53	53	53
Connectivity	CANbus, EBI/EMI, I2C, SPI, UART/USART	CANbus, EBI/EMI, I2C, SPI, UART/USART	CANbus, EBI/EMI, I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Data Converters	A/D 8x10b	A/D 8x10b	A/D 8x10b
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	64-TQFP (14x14)	64-TQFP (14x14)	64-TQFP (14x14)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
MSL Rating	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant
Packaging Format	Not specified	Tray	Cut Tape & Digi-Reel

Engineering Selection Recommendations

For New Designs and Production Continuity:

The AT90CAN128-16AI is obsolete and should not be selected for new designs. Both AT90CAN128-16AU and AT90CAN128-16AUR are active products with identical electrical and functional specifications.

Selection Criteria:

AT90CAN128-16AU: Select for applications requiring tray packaging format. Suitable for high-volume production environments with established component handling infrastructure.
AT90CAN128-16AUR: Select for applications requiring cut tape or Digi-Reel packaging. Preferred for automated pick-and-place assembly operations and component tape dispensing systems.

Compliance Advantage:

Both substitute parts are RoHS3 compliant, addressing regulatory requirements that the obsolete AT90CAN128-16AI does not meet. This compliance status is mandatory for products destined for markets with RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can AT90CAN128-16AU and AT90CAN128-16AUR be used interchangeably with AT90CAN128-16AI?

A: Yes. All three parts are electrically and functionally identical. The differences are limited to product status (obsolete vs. active) and packaging format (tray vs. cut tape). Pin configuration, memory specifications, clock speed, voltage requirements, and peripheral functionality are identical across all three variants.

Q: What is the primary reason to substitute the AT90CAN128-16AI?

A: The AT90CAN128-16AI is classified as obsolete, indicating discontinued manufacturing and limited availability. Active substitutes ensure long-term supply chain reliability and access to current manufacturing batches.

Q: Are there differences in RoHS compliance between the three parts?

A: Yes. The AT90CAN128-16AI is RoHS non-compliant, while both AT90CAN128-16AU and AT90CAN128-16AUR are RoHS3 compliant. For applications subject to RoHS regulations, only the active substitutes are acceptable.

Q: How do packaging formats affect component selection?

A: Packaging format determines handling and assembly compatibility. Tray packaging (AT90CAN128-16AU) is suitable for manual or semi-automated assembly. Cut Tape & Digi-Reel packaging (AT90CAN128-16AUR) is optimized for fully automated pick-and-place assembly systems. Electrical performance is identical regardless of packaging format.

Q: Is firmware or software modification required when switching between these parts?

A: No. All three parts share identical instruction set architecture, memory organization, and peripheral interfaces. Existing firmware and software require no modification for functional equivalence.

Q: What is the MSL rating and why is it relevant?

A: All three parts have MSL 3 rating with 168-hour floor life. This indicates moderate moisture sensitivity. Components must be stored in controlled humidity environments and baked according to IPC standards before reflow soldering to prevent solder joint defects.

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