ATSAM3N1CA-CU Equivalent & Substitute Parts

Part Overview

The ATSAM3N1CA-CU is an ARM Cortex-M3 SAM3N microcontroller IC manufactured by Microchip Technology. This 32-bit single-core processor operates at 48MHz with 64KB FLASH memory and is packaged in a 100-TFBGA (9x9) form factor. The part is currently listed as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity. The primary substitute maintains identical electrical and mechanical specifications while offering improved availability and active product status.

Substiute Parts

ATSAM3N1CA-CU

Microchip TechnologyIn Stock: 786ATSAM3N1CA-CU Datasheet

Current PartRFQ

ATSAM3N1CB-CU

AtmelIn Stock: 12208ATSAM3N1CB-CU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATSAM3N1CA-CU is based on strict equivalence across all critical electrical and mechanical parameters. The substitute part ATSAM3N1CB-CU maintains identical specifications in the following key areas:

• Core processor architecture (ARM Cortex-M3)
• Processing speed (48MHz)
• Memory configuration (64KB FLASH, 8KB RAM)
• Supply voltage range (1.62V ~ 3.6V)
• Data converter specifications (A/D 16x10b, D/A 1x10b)
• Connectivity interfaces (I2C, IrDA, SPI, UART/USART)
• Peripheral feature set (Brown-out Detect/Reset, DMA, POR, PWM, WDT)
• I/O count (79 pins)
• Operating temperature range (-40°C ~ 85°C)
• Package form factor (100-TFBGA 9x9)
• Mounting type (Surface Mount)
• Series designation (SAM3N)

The substitute part differs only in manufacturer designation (Atmel vs. Microchip Technology) and product status (Active vs. Obsolete), with no functional or electrical differences.

Parameter Comparison

Engineering Selection Recommendations

The ATSAM3N1CB-CU is a direct functional equivalent to the ATSAM3N1CA-CU. Selection of the substitute part is justified by the following factors:

• The original part (ATSAM3N1CA-CU) carries an obsolete product status, limiting long-term availability and support.
• The substitute part (ATSAM3N1CB-CU) maintains active product status with significantly higher inventory availability (12,100 units vs. 695 units).
• Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.
• Identical electrical specifications ensure drop-in compatibility at the circuit level.
• Identical package specifications (100-TFBGA 9x9) ensure PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can ATSAM3N1CB-CU be used as a direct replacement for ATSAM3N1CA-CU?

A: Yes. The ATSAM3N1CB-CU is electrically and mechanically identical to the ATSAM3N1CA-CU across all specified parameters. No circuit modifications or PCB redesign is required.

Q: Are there differences in pin configuration or pinout between these parts?

A: No. Both parts use the 100-TFBGA (9x9) package with 79 I/O pins. Pinout is identical.

Q: What is the primary reason to substitute the ATSAM3N1CA-CU?

A: The ATSAM3N1CA-CU is obsolete. The ATSAM3N1CB-CU is an active product with superior availability, making it the preferred choice for new designs and production continuity.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant and REACH unaffected. No compliance differences exist.

Q: Can existing firmware or software require modification when switching to the substitute part?

A: No. Identical processor architecture, memory configuration, and peripheral specifications ensure complete software compatibility without modification.