ATSAM3S4AA-MU

Overview

The ATSAM3S4AA-MU is an ARM microcontroller from the SAM3S series, featuring a 32-bit ARM Cortex-M3 core. It integrates 256 kB of Flash program memory and 48 kB of SRAM. 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, alongside a 3.3 V analog supply. It includes an 8-channel 12-bit ADC, six timers/counters, and multiple communication interfaces including SPI, UART, and I2C. The component is housed in a 48-pin QFN package and is rated for industrial temperature operation between -40°C and +85°C.

Feature Summary

• Integrates a high-performance 32-bit ARM Cortex-M3 processor core for efficient code execution.
• Provides substantial non-volatile storage with integrated Flash memory for application code.
• Supports versatile peripheral connectivity through standard serial communication protocols.
• Features integrated analog-to-digital conversion capabilities for sensor interfacing.

Applications

• Industrial control systems requiring robust processing and reliable communication
• Consumer electronics utilizing low-power ARM-based architectures
• Embedded applications needing precise analog signal acquisition via ADC

Procurement Notes

Verify the specific suffix MU indicates the QFN-48 package and industrial temperature grade when sourcing. Confirm RoHS compliance status through official Microchip documentation prior to integration. Ensure design compatibility with the specified 1.62 V to 1.9 V digital supply voltage range. Check for any recent Product Change Notifications regarding marking or assembly site changes.

Selection Notes

Select this model for designs requiring the balance of the SAM3S performance tier with a compact 48-pin footprint. Consider the 64 MHz operational speed and available I/O count against system requirements. Evaluate the power consumption characteristics relative to the 3.3 V analog domain needs. Compare pinout compatibility if replacing existing components in established layouts.

Part Context

This component belongs to the Microchip SAM3S family of smart ARM-based microcontrollers. The series is designed for cost-sensitive applications demanding Cortex-M3 efficiency. The ATSAM3S4AA variant specifically denotes the 256 kB Flash configuration within this lineup. The MU suffix identifies the specific physical packaging and environmental rating.

Replacement Considerations

Cross-reference with other SAM3S variants such as ATSAM3S4A-AU for different package options. Verify electrical compatibility with alternative packages like LQFP if board space allows. Ensure software frameworks are compatible across the SAM3S family for potential migration.