ATSAM3N0CA-AUR

Overview

The ATSAM3N0CA-AUR is a 32-bit microcontroller from the Microchip SAM3N series, featuring an ARM Cortex-M3 core operating at up to 48 MHz. It integrates 32 KB of embedded Flash memory and 8 KB of SRAM within a 48-LQFP package. The device supports a supply voltage range of 1.62 V to 3.6 V and includes eight 10-bit ADC channels. Connectivity options include I2C, SPI, UART/USART, and IrDA interfaces, alongside peripherals such as DMA, PWM, and watchdog timers.

Feature Summary

• Integrates ARM Cortex-M3 processor with Thumb-2 instruction set for efficient code execution
• Includes embedded voltage regulator enabling single-supply operation across specified voltage ranges
• Provides multiple communication interfaces including I2C, SPI, UART/USART, and IrDA support
• Features hardware security mechanisms such as Power-on-Reset and Brown-out detection

Applications

• Industrial control systems requiring robust reset protection
• Consumer electronics utilizing low-voltage power supplies
• Embedded applications needing serial communication via UART or SPI
• Data acquisition modules employing analog-to-digital conversion

Procurement Notes

Verify the specific suffix 'AUR' against official Microchip documentation to confirm tape-and-reel packaging and lead-free status. Ensure the component matches the exact pinout and electrical specifications required by your design. Cross-reference the datasheet revision history for any recent manufacturing changes. Confirm availability through authorized distributors to avoid counterfeit parts. Validate that the operating temperature range meets your environmental requirements.

Selection Notes

Select this component when a balance of moderate memory capacity and rich peripheral connectivity is needed in a compact 48-pin form factor. It serves as a suitable upgrade path from legacy SAM7S devices due to pin compatibility. Consider the internal oscillator accuracy if precise timing is critical without external crystals. Evaluate the 48 MHz clock speed against processing demands to ensure sufficient performance margins for real-time tasks.

Part Context

This part belongs to the SAM3N family, designed for cost-sensitive applications requiring ARM Cortex-M3 performance. It bridges the gap between 8-bit controllers and higher-end 32-bit MCUs. The series emphasizes low power consumption and ease of integration into existing designs. It shares architectural similarities with other SAM3N variants but differs in memory size and package options.

Replacement Considerations

Pin-compatible alternatives within the SAM3N series include ATSAM3N0AA-AUR (same memory, different suffix) or ATSAM3N00AA-AUR (reduced memory). For legacy upgrades, SAM7S series devices offer physical compatibility but differ in architecture. Higher memory variants like ATSAM3N1CA-AU provide more storage but require larger packages.