ATSAM4SA16BB-MNR

Overview

The ATSAM4SA16BB-MNR is a 32-bit microcontroller from the SAM4S series, manufactured by Microchip Technology. It integrates an ARM Cortex-M4 core operating at up to 120 MHz with a 2 Kbyte cache and DSP instructions. The device features 1 Mbyte of embedded Flash memory and 160 Kbytes of SRAM. It includes a full-speed USB 2.0 Device port, multiple communication interfaces including I2C, SPI, and USART, and analog peripherals comprising 11-channel 12-bit ADCs and two 12-bit DACs. The unit operates within a supply voltage range of 1.62 V to 3.6 V and supports surface-mount installation in a 64-pin QFN package.

Feature Summary

• Integrates an ARM Cortex-M4 processor with hardware DSP instruction support and a Memory Protection Unit for secure execution.
• Provides extensive connectivity through a Full-Speed USB 2.0 Device interface alongside standard serial protocols such as I2C, SPI, and USART.
• Features high-precision analog conversion capabilities with multiple 12-bit ADC channels and dual 12-bit DAC outputs.
• Supports robust system management with integrated power-on reset, brown-out detection, and watchdog timer functionalities.

Applications

• Industrial control systems requiring deterministic processing and reliable communication
• USB-enabled peripheral devices and human-machine interface controllers
• Data acquisition systems utilizing multi-channel analog signal processing
• Embedded applications demanding high code density and low power consumption

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 designated QFN variant. Confirm RoHS compliance status and moisture sensitivity level requirements prior to assembly planning. Cross-reference part numbers with current distributor listings to avoid obsolete stock.

Selection Notes

Select this component when design requirements necessitate a balance between processing performance and memory capacity within a compact form factor. The inclusion of on-chip USB transceivers reduces external component count compared to solutions requiring separate PHYs. Evaluate thermal dissipation needs based on the specific QFN package thermal characteristics and ambient operating conditions.

Part Context

This microcontroller belongs to the SAM4S family, which shares pin compatibility with previous generations like the SAM3S and SAM7S series. This architectural continuity facilitates migration paths for legacy designs while offering enhanced performance through the Cortex-M4 core. The series targets cost-sensitive applications that require advanced peripheral integration without increasing board space.

Replacement Considerations

Direct substitutes include other variants within the SAM4S family such as the ATSAM4S16B or ATSAM4S32B, depending on required memory sizes. Pin-compatible alternatives may exist within the SAM3S series for backward compatibility, though feature sets will differ. Verify electrical specifications and software compatibility before implementing any cross-series replacements.