Equivalent & Substitute Parts Reference for ATSAM3N2BA-AU

Part Overview

The ATSAM3N2BA-AU is a 32-bit ARM® Cortex®-M3 microcontroller from Microchip Technology, featuring 128KB FLASH memory and a 64-LQFP package. Its functional capabilities include standard connectivity options (I2C, IrDA, SPI, UART/USART) and a suite of integrated peripherals, making it suitable for diverse embedded applications. This model is classified as obsolete, necessitating the evaluation and selection of appropriate equivalent and substitute parts to ensure continued product availability, maintain design compatibility, and meet project requirements where the original device can no longer be sourced.

Key Parameters

Parameter	Description
Core Processor	ARM® Cortex®-M3
Core Size	32-Bit Single-Core
Speed	48MHz
Connectivity	I2C, IrDA, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number of I/O	47
Program Memory Size	128KB (128K x 8)
Program Memory Type	FLASH
RAM Size	16K x 8
Voltage - Supply (Vcc/Vdd)	1.62V ~ 3.6V
Data Converters	A/D 10x10b; D/A 1x10b
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Supplier Device Package	64-LQFP (10x10)
Package / Case	64-LQFP
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected
ECCN	3A991A2
HTSUS	8542.31.0025

Substitute Part Grouping Explanation

Substitute parts for ATSAM3N2BA-AU are selected strictly according to common required electrical, mechanical, and regulatory parameters for embedded microcontrollers. Key parameters defining equivalence in this context include: core size and processor architecture, I/O count, memory configuration, supply voltage range, package and mounting type, data converter specifications, peripherals set, operating temperature, regulatory and compliance status. Only models matching these parameters as provided are considered valid substitutes.

Parameter Comparison

Parameter	ATSAM3N2BA-AU	ATSAM4N8BA-AU	ATSAM4S2BA-AU
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology
Core Processor	ARM® Cortex®-M3	ARM® Cortex®-M4	ARM® Cortex®-M4
Core Size	32-Bit Single-Core	32-Bit Single-Core	32-Bit Single-Core
Speed	48MHz	100MHz	120MHz
Connectivity	I2C, IrDA, SPI, UART/USART	I2C, IrDA, SPI, UART/USART	I2C, IrDA, Memory Card, SPI, SSC, UART/USART, USB
Peripherals	Brown-out Detect/Reset, DMA, POR, PWM, WDT	Brown-out Detect/Reset, DMA, POR, PWM, WDT	Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number of I/O	47	47	47
Program Memory Size	128KB (128K x 8)	512KB (512K x 8)	128KB (128K x 8)
Program Memory Type	FLASH	FLASH	FLASH
RAM Size	16K x 8	64K x 8	64K x 8
Voltage - Supply (Vcc/Vdd)	1.62V ~ 3.6V	1.62V ~ 3.6V	1.62V ~ 3.6V
Data Converters	A/D 10x10b; D/A 1x10b	A/D 11x10b; D/A 1x10b	A/D 16x12b; D/A 2x12b
Oscillator Type	Internal	Internal	Internal
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Supplier Device Package	64-LQFP (10x10)	64-LQFP (10x10)	64-LQFP (10x10)
Package / Case	64-LQFP	64-LQFP	64-LQFP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	3A991A2	3A991A2	3A991A2

Engineering Selection Recommendations

When selecting a substitute for the ATSAM3N2BA-AU, consideration is limited to product status (obsolete vs. active), RoHS3 compliance, REACH status, and ECCN codes. Both ATSAM4N8BA-AU and ATSAM4S2BA-AU are active products with ROHS3 and REACH compliance matching the original part. ECCN codes are consistent across main and substitute parts. Inventory status is provided as part of direct comparability.

Frequently Asked Questions (FAQ)

Q1: Which parameters determine if a part is a direct substitute for ATSAM3N2BA-AU?
Substitution is determined by core size, processor architecture, I/O count, memory specifications, supply voltage range, package type, regulatory compliance status, and supported peripherals.

Q2: Are package and mounting considerations identical between ATSAM3N2BA-AU and its substitutes?
Yes, all compared models use the 64-LQFP (10x10) surface mount package configuration.

Q3: Is it necessary to consider RAM and program memory differences when selecting a substitute?
Only the parameters provided are considered for direct equivalence, including program memory type and size. Any differences are noted in the parameter comparison, with selection limited to these stated criteria.

Q4: Are all substitute parts RoHS3 and REACH compliant?
Yes, all listed substitutes (ATSAM4N8BA-AU, ATSAM4S2BA-AU) are ROHS3 compliant and REACH unaffected.

Q5: How does operating temperature range affect substitute selection?
All parts listed share an operating temperature range of -40°C ~ 85°C (TA), satisfying the stated thermal requirements.

Q6: Do substitute microcontrollers offer identical connectivity and peripherals?
Substitutes support the required connectivity and peripherals as listed in the key parameter table. Differences are shown in the parameter comparison and selection is based strictly on provided information.

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