ATSAM3S4BA-AU

Overview

The ATSAM3S4BA-AU is a 32-bit microcontroller unit (MCU) based on the ARM Cortex-M3 processor core, manufactured by Microchip Technology. It operates at a maximum clock frequency of 64 MHz and features 256 KB of in-system programmable flash memory alongside 48 KB of static RAM. The device is housed in a 64-LQFP package with dimensions of 10x10 mm and provides 47 general-purpose input/output pins. It supports a supply voltage range of 1.62 V to 3.6 V and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates an ARM Cortex-M3 processor core for efficient 32-bit code execution.
• Includes built-in analog-to-digital conversion with 10 channels and 12-bit resolution.
• Supports multiple communication interfaces including USB, SPI, I2C, and USART.
• Features hardware peripherals such as DMA controllers and PWM units.

Applications

• Industrial control systems requiring robust processing capabilities
• Consumer electronics utilizing USB connectivity
• Medical devices needing precise analog signal acquisition
• Automotive instrumentation operating in wide temperature ranges

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to ensure correct package type and temperature rating. Confirm RoHS compliance status through current datasheets or environmental reports. Check for any recent Product Change Notifications regarding assembly sites or marking changes before finalizing procurement orders.

Selection Notes

Select this component when a balance of moderate flash capacity and high-speed processing is required. The 64 MHz speed suits applications needing rapid response times without excessive power consumption. Ensure the design accommodates the 64-pin LQFP footprint and utilizes the available GPIO count for peripheral interfacing needs.

Part Context

This MCU belongs to the SAM3S series, designed for cost-sensitive embedded applications. It shares architectural similarities with other SAM3 variants but offers specific memory configurations tailored for mid-range performance requirements. The series emphasizes low power operation while maintaining compatibility with standard development tools.

Replacement Considerations

Consult official substitution guides for pin-compatible alternatives within the SAM3S family. Verify that candidate parts match the exact flash size, RAM capacity, and package dimensions. Cross-reference interface availability to ensure functional equivalence in the target application.