ATSAM3N1CA-AU Equivalent & Substitute Parts

Part Overview

The ATSAM3N1CA-AU is an ARM Cortex-M3 SAM3N microcontroller IC manufactured by Microchip Technology, featuring 32-bit single-core architecture, 48MHz clock speed, and 64KB FLASH memory in a 100-LQFP package. This part is currently listed as obsolete, making identification of compatible substitute components essential for ongoing design support and production continuity. The ATSAM3N1CB-AU serves as a direct functional equivalent with identical electrical and mechanical specifications but maintains active product status.

Substiute Parts

ATSAM3N1CA-AU

Microchip TechnologyIn Stock: 1433ATSAM3N1CA-AU Datasheet

Current PartRFQ

ATSAM3N1CB-AU

AtmelIn Stock: 3286ATSAM3N1CB-AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ATSAM3N1CA-AU is determined by strict equivalence across the following critical parameters:

• Core Architecture: ARM Cortex-M3 processor
• Memory Configuration: 64KB FLASH, 8K x 8 RAM
• Clock Frequency: 48MHz operation
• Voltage Range: 1.62V ~ 3.6V supply compatibility
• Peripheral Set: Identical I2C, IrDA, SPI, UART/USART, and auxiliary functions
• Package Specification: 100-LQFP (14x14) form factor
• I/O Count: 79 pins
• Data Converter Specifications: A/D 16x10b and D/A 1x10b

The ATSAM3N1CB-AU meets all substitution criteria, maintaining identical electrical characteristics, pin configuration, and functional capability while differing only in product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

The ATSAM3N1CB-AU is the direct substitute for the obsolete ATSAM3N1CA-AU. Both components are members of the SAM3N microcontroller family and share identical electrical specifications, memory configuration, peripheral functionality, and 100-LQFP package format. The primary distinction is product lifecycle status: the ATSAM3N1CA-AU is obsolete, while the ATSAM3N1CB-AU maintains active production status.

For new designs or production continuity, the ATSAM3N1CB-AU is the appropriate selection. Both parts comply with ROHS3 standards and maintain equivalent moisture sensitivity classifications. No design modifications, firmware changes, or PCB layout alterations are required when transitioning between these components.

Frequently Asked Questions (FAQ)

Q: Are ATSAM3N1CA-AU and ATSAM3N1CB-AU pin-compatible?

A: Yes. Both components use the 100-LQFP (14x14) package with 79 I/O pins in identical pin configurations. Direct PCB substitution is possible without layout modifications.

Q: What is the primary reason for substitution?

A: The ATSAM3N1CA-AU is obsolete. The ATSAM3N1CB-AU provides identical functionality with active product status and ongoing manufacturer support.

Q: Do these parts require different supply voltages?

A: No. Both components operate across the identical voltage range of 1.62V ~ 3.6V (Vcc/Vdd).

Q: Are firmware or software changes necessary?

A: No. The ATSAM3N1CB-AU maintains full architectural and functional equivalence with the ATSAM3N1CA-AU. Existing firmware requires no modification.

Q: What are the memory specifications for both parts?

A: Both contain 64KB FLASH program memory and 8K x 8 RAM. Data converter capabilities are identical: 16-channel 10-bit A/D and 1-channel 10-bit D/A.

Q: Are there differences in peripheral functionality?

A: No. Both parts include identical peripheral sets: I2C, IrDA, SPI, UART/USART, Brown-out Detect/Reset, DMA, POR, PWM, and WDT.

Q: What is the operating temperature range?

A: Both components operate from -40°C to 85°C (TA), supporting industrial and extended temperature applications.

Q: Are there packaging or handling differences?

A: Both use surface mount technology with 100-LQFP packages. Moisture sensitivity level is 2 (1 Year) for the ATSAM3N1CA-AU; the ATSAM3N1CB-AU specification is not provided but maintains compatibility.