ATSAM3S1AA-MU

Overview

The ATSAM3S1AA-MU is an ARM microcontroller from the SAM3S series, featuring a 32-bit ARM Cortex-M3 core. It integrates 64 kB of Flash program memory and 16 kB of SRAM data RAM. The device operates with a maximum clock frequency of 64 MHz and supports a supply voltage range of 1.62 V to 1.9 V for digital logic, with an analog supply of 3.3 V. It provides 34 general-purpose I/O pins and includes an 8-channel 12-bit ADC. The component is housed in a QFN-48 package and is rated for an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates a high-performance 32-bit ARM Cortex-M3 processor core with hardware multiply and divide capabilities.
• Includes on-chip non-volatile Flash memory for code storage and static RAM for data handling.
• Features multiple communication interfaces including SPI, UART, and RS-485 support.
• Equipped with a 12-bit analog-to-digital converter for signal acquisition.

Applications

• Industrial control systems requiring robust processing in harsh environments
• Consumer electronics utilizing low-power ARM-based architectures
• Embedded applications needing serial communication via UART or SPI

Procurement Notes

Verify the specific ordering suffix to confirm package type and temperature grade. Confirm RoHS compliance status through official Microchip documentation. Check for obsolescence notices as this part may be discontinued. Ensure ESD protection measures are applied during handling due to moisture sensitivity classification.

Selection Notes

Select this component when a compact QFN-48 footprint is required alongside moderate Flash capacity. Compare against other SAM3S variants if higher I/O counts or larger memory sizes are needed. Consider power consumption requirements relative to the 1.62 V to 1.9 V operating range. Evaluate peripheral availability against application interface needs.

Part Context

This MCU belongs to the SAM3S family, designed for cost-sensitive applications using the ARM Cortex-M3 architecture. It shares architectural similarities with other SAM3S devices but differs in memory size and pin count. The series targets embedded markets requiring efficient code execution and integrated peripherals.

Replacement Considerations

Consult Microchip's official cross-reference tools for verified substitutes. Alternative parts within the SAM3S series may offer increased memory or I/O options while maintaining software compatibility.