ATSAM3S8CA-AU

Overview

The ATSAM3S8CA-AU is a 32-bit microcontroller from the Microchip SAM3S series, built on the ARM Cortex-M3 core. It operates at a maximum frequency of 64MHz and features 512KB of in-system programmable flash memory alongside 64KB of static RAM. The device supports a supply voltage range of 1.62V to 3.6V and includes integrated analog-to-digital converters with 10-bit and 12-bit resolutions. Connectivity options encompass USB, SPI, I2C, USART, and SSC interfaces. It is housed in a 100-LQFP package suitable for surface-mount applications.

Feature Summary

• Integrates an ARM Cortex-M3 processor core for efficient 32-bit execution
• Provides substantial non-volatile storage via 512KB flash memory
• Supports multiple communication protocols including USB and serial interfaces
• Includes mixed-signal capabilities with internal oscillators and ADC/DAC units

Applications

• Industrial control systems requiring robust processing
• Consumer electronics utilizing USB connectivity
• Medical devices needing precise analog signal acquisition
• Automotive instrumentation within specified temperature ranges

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for the 100-LQFP form factor. Cross-reference assembly site notices for any recent manufacturing location changes that may affect compliance or sourcing channels. Confirm RoHS status through current datasheets before finalizing procurement decisions.

Selection Notes

Select this component when high code density and moderate performance are required within the SAM3S family. It offers a balance between memory capacity and pin count compared to smaller variants. Consider the 64MHz clock speed sufficient for complex peripheral management tasks. Evaluate power consumption requirements against the 1.62V to 3.6V operating range for battery-powered designs.

Part Context

This part belongs to the ATSAM3S series, which targets cost-sensitive embedded applications. It shares architectural similarities with other SAM3 devices but differs in memory size and peripheral availability. The series utilizes the same ARM Cortex-M3 core found in higher-performance SAM3X and SAM4 families, ensuring software compatibility across product lines while optimizing for specific market segments.

Replacement Considerations

ATSAM3S8CA-AUR serves as the tape-and-reel equivalent of this tray-packaged unit. Other SAM3S variants like ATSAM3S4CA offer reduced memory for space-constrained designs. Direct functional replacements require matching the 100-pin LQFP footprint and verifying peripheral compatibility.