ATXMEGA64B3-MN Equivalent & Substitute Parts

Part Overview

The ATXMEGA64B3-MN is an AVR XMEGA B3 series microcontroller manufactured by Microchip Technology, designed for embedded applications requiring 8/16-bit processing capability. This Surface Mount device operates at 32MHz with 64KB FLASH memory and integrates multiple communication interfaces including I2C, IrDA, SPI, UART/USART, and USB connectivity. The part maintains Active product status and is RoHS3 compliant. Identifying equivalent substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain component availability across manufacturing cycles.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8/16-Bit
Speed	32MHz
Program Memory Size	64KB (32K x 16)
Program Memory Type	FLASH
EEPROM Size	2K x 8
RAM Size	4K x 8
Voltage Supply (Vcc/Vdd)	1.6V ~ 3.6V
Data Converters	A/D 8x12b
Number of I/O	36
Connectivity	I2C, IrDA, SPI, UART/USART, USB
Peripherals	Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
Mounting Type	Surface Mount
Package	64-VFQFN Exposed Pad (9x9)
Operating Temperature	-40°C ~ 105°C (TA)

Substitute Part Grouping Explanation

Substitution of the ATXMEGA64B3-MN is determined by strict equivalence across the following critical parameters: core processor architecture (AVR), core size (8/16-Bit), processing speed (32MHz), program memory capacity (64KB FLASH), EEPROM size (2K x 8), RAM size (4K x 8), supply voltage range (1.6V ~ 3.6V), data converter specification (A/D 8x12b), I/O count (36 pins), connectivity interfaces (I2C, IrDA, SPI, UART/USART, USB), peripheral feature set (Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT), and physical package format (64-VFQFN Exposed Pad 9x9). The substitute part ATXMEGA64B3-MH meets all these criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Parameter	ATXMEGA64B3-MN (Main)	ATXMEGA64B3-MH (Substitute)
Manufacturer	Microchip Technology	Atmel
Series	AVR® XMEGA® B3	AVR® XMEGA® B3
Core Processor	AVR	AVR
Core Size	8/16-Bit	8/16-Bit
Speed	32MHz	32MHz
Program Memory Size	64KB (32K x 16)	64KB (32K x 16)
Program Memory Type	FLASH	FLASH
EEPROM Size	2K x 8	2K x 8
RAM Size	4K x 8	4K x 8
Voltage Supply (Vcc/Vdd)	1.6V ~ 3.6V	1.6V ~ 3.6V
Data Converters	A/D 8x12b	A/D 8x12b
Number of I/O	36	36
Connectivity	I2C, IrDA, SPI, UART/USART, USB	I2C, IrDA, SPI, UART/USART, USB
Peripherals	Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT	Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
Mounting Type	Surface Mount	Surface Mount
Package / Case	64-VFQFN Exposed Pad	64-VFQFN Exposed Pad
Supplier Device Package	64-QFN (9x9)	64-QFN (9x9)
Operating Temperature	-40°C ~ 105°C (TA)	-40°C ~ 85°C (TA)
Product Status	Active	Active
ECCN	5A992C	5A992C
HTSUS	8542.31.0001	8542.31.0001

Engineering Selection Recommendations

Both the ATXMEGA64B3-MN and ATXMEGA64B3-MH are Active product status devices suitable for production deployment. The ATXMEGA64B3-MH is designated as the manufacturer-recommended substitute and shares identical electrical specifications, memory configuration, connectivity interfaces, and peripheral feature set. The primary distinction is the operating temperature range: the ATXMEGA64B3-MN supports -40°C to 105°C, while the ATXMEGA64B3-MH supports -40°C to 85°C. Selection between these parts should be based on the specific thermal requirements of the target application. Both parts comply with RoHS3 standards and carry identical export classification codes (ECCN 5A992C, HTSUS 8542.31.0001), ensuring regulatory consistency across supply chain alternatives.

Frequently Asked Questions (FAQ)

Q: Can ATXMEGA64B3-MH be used as a direct replacement for ATXMEGA64B3-MN?

A: Yes, the ATXMEGA64B3-MH is a manufacturer-recommended equivalent substitute. All core electrical parameters, memory specifications, I/O configuration, connectivity interfaces, and peripheral features are identical. The only difference is the maximum operating temperature specification.

Q: What is the key difference between ATXMEGA64B3-MN and ATXMEGA64B3-MH?

A: The operating temperature range differs. ATXMEGA64B3-MN operates from -40°C to 105°C, while ATXMEGA64B3-MH operates from -40°C to 85°C. Applications requiring operation above 85°C must use the ATXMEGA64B3-MN.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use the 64-VFQFN Exposed Pad package with 9x9mm dimensions. PCB layout and footprint design are directly compatible.

Q: Do these parts have the same pin configuration?

A: Yes. Both parts feature 36 I/O pins with identical connectivity interfaces (I2C, IrDA, SPI, UART/USART, USB) and peripheral assignments.

Q: Are there any compliance or certification differences?

A: No. Both parts share identical ECCN (5A992C) and HTSUS (8542.31.0001) classifications, and both comply with RoHS3 standards.

Q: Which part should I select for high-temperature applications?

A: For applications requiring operation above 85°C, the ATXMEGA64B3-MN is the appropriate selection due to its extended temperature range to 105°C.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company