ATSAM3N4AA-AU

Overview

The ATSAM3N4AA-AU is a 32-bit microcontroller unit based on the ARM Cortex-M3 core, belonging to the SAM3N series. It features 256KB of in-system programmable flash memory and 24KB of static RAM. The device operates at a maximum clock frequency of 48MHz with a supply voltage range of 1.62V to 3.6V. It includes eight 10-bit analog-to-digital converter channels and provides 34 general-purpose I/O lines. Connectivity options include I2C, IrDA, SPI, and UART/USART interfaces. The component is housed in a 48-LQFP package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates an ARM Cortex-M3 processor core for efficient 32-bit execution.
• Provides substantial non-volatile storage via 256KB of flash memory.
• Supports multiple serial communication protocols including SPI, I2C, and USART.
• Includes integrated analog conversion capabilities with eight dedicated channels.

Applications

• Industrial control systems requiring robust processing
• Consumer electronics utilizing low-power operation
• Embedded applications needing multiple serial interfaces
• General-purpose microcontroller tasks in compact form factors

Procurement Notes

Verify the specific suffix 'AU' corresponds to the 48-LQFP package and industrial temperature grade. Confirm RoHS compliance status as required by your assembly specifications. Check current lifecycle status, as availability may vary due to production updates. Ensure design-in compatibility with existing development tools and software frameworks provided by the manufacturer.

Selection Notes

Select this model when 256KB of program memory and 24KB of RAM are sufficient for application logic. Choose the LQFP-48 package if surface-mount space constraints align with its dimensions. Consider the 48MHz speed limit for timing-critical tasks. Evaluate peripheral requirements against the available I2C, SPI, and USART instances before finalizing the part number.

Part Context

This component is part of the Microchip SAM3N family, designed for cost-sensitive embedded applications. The series shares architectural similarities with other Cortex-M3 devices but offers specific memory and peripheral configurations. It serves as a bridge between high-performance and ultra-low-power MCU categories, targeting applications that require moderate processing power without excessive energy consumption.

Replacement Considerations

Consult official cross-reference guides for pin-compatible alternatives within the SAM3N or SAM3A families. Verify that any substitute maintains identical flash size, RAM capacity, and package footprint. Ensure peripheral counts and electrical characteristics match the original design requirements before implementation.