ATSAM3SD8BA-MU

Overview

The ATSAM3SD8BA-MU is an ARM microcontroller from the SAM3S series, featuring a Cortex-M3 core operating at a maximum clock frequency of 64 MHz. It integrates 512 kB of Flash program memory and 64 kB of data RAM within a QFN-64 package. The device supports a supply voltage range of 1.62 V to 1.9 V for digital logic and utilizes 3.3 V for I/O and analog interfaces. Key peripherals include an 11-channel 12-bit ADC, six timers/counters, and communication interfaces such as SPI, UART, RS-485, and two-wire protocols.

Feature Summary

• Integrates high-capacity non-volatile Flash memory suitable for complex firmware storage.
• Includes dedicated hardware support for secure cryptographic operations.
• Features multiple serial communication interfaces for versatile peripheral connectivity.
• Provides flexible analog-to-digital conversion capabilities with multiple input channels.

Applications

• Industrial control systems requiring robust processing and secure communication
• Medical devices utilizing encrypted data transmission and precise analog sensing
• Smart metering applications needing reliable long-term data storage

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm package type and temperature grade. Ensure compatibility with existing design constraints regarding the 1.62 V to 1.9 V core voltage range. Confirm that the QFN-64 footprint matches the PCB layout specifications. Check for any recent Product Change Notices affecting assembly sites or materials.

Selection Notes

Select this component when a balance of moderate processing power and significant code storage is required in a compact form factor. The inclusion of hardware crypto accelerators makes it suitable for security-sensitive applications without external components. Consider the limited I/O count compared to larger packages if extensive peripheral interfacing is needed.

Part Context

This part belongs to the ATSAM3S family, which is based on the ARM Cortex-M3 architecture. It is designed for cost-sensitive applications requiring efficient code execution and integrated peripherals. The SAM3S series typically targets general-purpose embedded control tasks where power efficiency and small package size are prioritized over high-speed processing capabilities found in higher-end families.

Replacement Considerations

Consult official substitution guides for pin-compatible alternatives within the SAM3S series. Verify functional equivalence regarding memory sizes and peripheral availability before replacing.

FAQ

Does the ATSAM3SD8BA-MU include hardware cryptographic acceleration?

Yes, the 'D' designation in the model number indicates the presence of hardware cryptographic accelerators for security functions.

What is the maximum operating speed of the Cortex-M3 core in this device?

The core operates at a maximum clock frequency of 64 MHz.