ATSAM3N0AA-MU

Overview

The ATSAM3N0AA-MU is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 48 MHz. It features 32 KB of embedded Flash memory and 8 KB of SRAM. The device supports a supply voltage range of 1.62 V to 3.6 V and includes an internal oscillator. Connectivity options include I2C, IrDA, SPI, and UART/USART interfaces. It provides 34 general-purpose I/O pins and integrates eight 10-bit ADC channels. Peripheral functions encompass DMA, PWM, watchdog timer, power-on reset, and brown-out detection. The component is housed in a 48-QFN package with dimensions of 7x7 mm.

Feature Summary

• Integrates ARM Cortex-M3 processor with Thumb-2 instruction set support for efficient code execution.
• Includes embedded voltage regulator enabling single-supply operation within specified voltage limits.
• Provides multiple communication interfaces including SPI, UART, and I2C for system connectivity.
• Features hardware peripherals such as DMA controller, PWM generator, and watchdog timer.

Applications

• Industrial control systems requiring low-power 32-bit processing
• Consumer electronics utilizing serial communication protocols
• Embedded applications needing analog signal acquisition via integrated ADC

Procurement Notes

Verify the specific suffix 'MU' corresponds to the QFN-48 package variant when sourcing. Confirm that the ordering part number matches the required pin configuration and thermal pad specifications. Ensure compatibility with existing PCB footprints designed for the 48-LQFP or 48-QFN form factors. Check manufacturer documentation for any recent packaging or marking changes affecting physical dimensions.

Selection Notes

Select this model when 32 KB of program memory and 8 KB of data RAM are sufficient for application requirements. Choose the QFN-48 package if space-constrained surface-mount assembly is preferred over LQFP alternatives. Consider the 48 MHz clock speed and peripheral set against higher-performance SAM3X series devices if additional I/O or faster processing is needed.

Part Context

This component belongs to the Microchip SAM3N family of 32-bit microcontrollers. The family shares architectural similarities with the legacy SAM7S and SAM3S series, offering pin-to-pin compatibility in certain configurations. The SAM3N series is designed for cost-sensitive applications requiring ARM Cortex-M3 performance with reduced peripheral counts compared to larger family members.

Replacement Considerations

ATSAM3N0AA-AU offers identical electrical specifications but utilizes a 48-LQFP package instead of QFN. ATSAM3N00AA-MU provides the same QFN package but with reduced memory capacity (16 KB Flash, 4 KB SRAM). Verify mechanical footprint differences before substituting these variants.