ATSAM3N0CA-AU

Overview

The ATSAM3N0CA-AU is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 48 MHz. It features 64 KB of embedded Flash memory and 8 KB of SRAM. The device includes an internal oscillator and supports supply voltages from 1.62 V to 3.6 V. Connectivity options include I2C, IrDA, SPI, and UART/USART interfaces. It provides 79 general-purpose I/Os and integrates peripherals such as DMA, PWM, WDT, POR, and BOD. The component is housed in a 100-LQFP package and operates within a temperature range of -40°C to 85°C.

Feature Summary

• Integrates ARM Cortex-M3 processor with Thumb-2 instruction set support
• Includes embedded voltage regulator for single-supply operation
• Features pin-to-pin compatibility with SAM7S and SAM3S legacy products
• Provides hardware security via Power-on-Reset and Brown-out detection

Applications

• Industrial control systems requiring legacy pin compatibility
• Consumer electronics utilizing low-power ARM architectures
• Embedded applications needing integrated analog-to-digital conversion
• Communication devices supporting serial peripheral interfaces

Procurement Notes

Verify the specific suffix 'CA' against official Microchip documentation to confirm manufacturing site and material compliance status. Ensure the 100-LQFP package dimensions match your PCB footprint requirements. Confirm that the internal oscillator meets your system timing accuracy needs without external crystal components. Check current availability status as this series may have transitioned to alternative models.

Selection Notes

Select this model when pin compatibility with existing SAM7S or SAM3S designs is required. Choose this variant for applications needing 64 KB of program storage and 8 KB of data RAM. Consider this part if the design utilizes a 100-pin form factor and requires multiple serial communication interfaces. Verify that the 48 MHz processing speed satisfies the real-time control requirements of the target application.

Part Context

This component belongs to the SAM3N family of 32-bit microcontrollers designed for cost-sensitive applications. The family shares architectural similarities with the SAM3S series but offers different memory configurations and pin counts. The ATSAM3N0CA-AU specifically targets designs requiring moderate performance with extensive I/O capabilities in a compact surface-mount package.

Replacement Considerations

Consult official Microchip documents for direct pin-compatible replacements within the SAM3N series. Verify functional equivalence for any cross-series substitutions involving the SAM3S line.