ATSAM3S1AB-MU

Overview

The ATSAM3S1AB-MU is a Microchip Technology ARM microcontroller featuring an ARM Cortex-M3 core. It provides 64 kB of Flash program memory and 16 kB of SRAM data RAM within a QFN-48 package. The device operates at a maximum clock frequency of 20 MHz with a 32-bit data bus width. It supports input/output voltages ranging from 1.62 V to 3.6 V and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates an ARM Cortex-M3 processor core for efficient code execution.
• Includes on-chip Flash memory for non-volatile program storage.
• Supports multiple communication interfaces including SPI, I2C, and USART.

Applications

• General-purpose embedded control systems
• Industrial automation controllers
• Consumer electronic devices

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm pinout compatibility and electrical characteristics. Ensure the component meets required environmental standards for the intended operating temperature range. Cross-reference datasheet revisions to confirm interface availability and memory configuration matches the design requirements.

Selection Notes

Select this model when a compact QFN-48 footprint is required alongside moderate processing capabilities. The 20 MHz speed suits applications not demanding high-frequency performance. Verify that the 64 kB Flash and 16 kB RAM meet application constraints before choosing over higher-density SAM3S variants.

Part Context

This component belongs to the Microchip SAM3S series of 32-bit ARM Cortex-M3 microcontrollers. The series offers various memory configurations and package options. The ATSAM3S1AB variant specifically targets cost-sensitive applications requiring reliable ARM-based processing in a small form factor.

Replacement Considerations

Consult official substitution lists for equivalent parts within the SAM3S family. Verify pin-to-pin compatibility and memory size equivalence before replacing.