ATSAM3N1AB-MU

Overview

The ATSAM3N1AB-MU is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum clock frequency of 48 MHz. It features 64 KB of in-system programmable Flash memory and 8 KB of SRAM. The device operates within a supply voltage range of 1.62 V to 1.95 V. It includes an 8-channel 10-bit analog-to-digital converter (ADC) and provides 34 general-purpose I/O pins. Connectivity options include I2C, SPI, UART/USART, and IrDA interfaces. The component is housed in a 48-pin QFN package with exposed pad.

Feature Summary

• Integrates an ARM Cortex-M3 processor core for efficient 32-bit instruction execution
• Provides non-volatile program storage via 64 KB of in-system programmable Flash memory
• Includes multiple communication peripherals such as I2C, SPI, and USART for system connectivity
• Features an integrated 10-bit ADC with eight input channels for analog signal acquisition

Applications

• Low-power embedded control systems requiring 32-bit processing
• Industrial devices utilizing serial communication protocols like I2C or SPI
• Battery-operated equipment compatible with 1.8V logic levels
• Data acquisition modules using internal analog-to-digital conversion

Procurement Notes

Verify the specific suffix 'MU' corresponds to the 48-QFN package and industrial temperature range during sourcing. Confirm that the 1.62V–1.95V supply voltage requirement aligns with your system design, as this variant differs from broader voltage family members. Ensure ESD precautions are observed due to the exposed thermal pad in the QFN-48 footprint.

Selection Notes

Select this part when a 48 MHz Cortex-M3 solution is required with 64 KB of Flash and 8 KB of RAM. It is suitable for designs constrained by a narrow 1.8V power supply domain. Compare against other SAM3N variants if higher voltage tolerance or different memory configurations are needed. Verify pin compatibility with existing PCB layouts designed for the 48-QFN form factor.

Part Context

This component belongs to the Microchip SAM3N series, which targets low-cost, low-power applications. The series utilizes the ARM Cortex-M3 architecture to deliver high performance while maintaining energy efficiency. The ATSAM3N1AB-MU represents a specific configuration within this family, defined by its memory size and package type.

Replacement Considerations

The ATSAM3N1AB-MUR is a tape-and-reel version of the same silicon and functionality. Other SAM3N models may offer different memory sizes but require software adaptation.