ATSAME51N20A-AU

Overview

The ATSAME51N20A-AU is an automotive-grade ARM microcontroller from the ATSAME51 series, manufactured by Microchip Technology. It features an ARM Cortex-M4F core operating at a maximum clock frequency of 120 MHz. The device integrates 1 MB of Flash program memory and 256 kB of SRAM data RAM within a TQFP-100 package. It supports a supply voltage range of 1.71 V to 3.63 V and operates within an extended temperature range of -40°C to +85°C. Key peripherals include a 12-bit ADC with 24 channels, a 12-bit DAC, and interfaces such as CAN, LIN, I2C, SPI, and USART. The component holds AEC-Q100 qualification.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for robust performance in vehicle environments.
• Integrated floating-point unit (FPU) within the ARM Cortex-M4F core for efficient mathematical processing.
• Supports multiple communication protocols including CAN and LIN for automotive network connectivity.
• High-resolution analog conversion capabilities with 24-channel 12-bit ADC and 12-bit DAC.

Applications

• Automotive body control modules
• Instrument clusters and displays
• Infotainment system controllers
• Sensor fusion nodes

Procurement Notes

Verify the specific suffix 'AU' corresponds to the TQFP-100 tray packaging variant when sourcing. Confirm that the AEC-Q100 qualification aligns with your project's automotive grade requirements. Ensure compatibility with the 1.71 V to 3.63 V supply voltage range for your power design. Check for moisture sensitivity levels if the component has been exposed to ambient conditions prior to assembly.

Selection Notes

Select this model when a 1 MB Flash capacity and 256 kB RAM are required for complex automotive applications. The TQFP-100 package offers 81 I/O pins suitable for extensive peripheral integration. Choose this part over lower-capacity variants like the J19A if larger code storage or data buffers are needed. The integrated FPU makes it suitable for signal processing tasks compared to non-FPU cores.

Part Context

This component belongs to the ATSAME51 family, which targets high-performance embedded applications requiring automotive certification. It shares the same Cortex-M4F core architecture as other members but differs in memory size and package options. The N20A designation specifically indicates the 1 MB Flash and 256 kB RAM configuration within the 100-pin form factor.

Replacement Considerations

ATSAMD51N20A-AUT: Similar specifications but lacks explicit automotive qualification documentation in standard listings.

FAQ

What is the maximum operating temperature for the ATSAME51N20A-AU?

The maximum operating temperature is +85°C, consistent with its extended industrial/automotive rating.

Does this MCU support CAN FD?

The official specification lists CAN interface support; however, specific CAN FD capability details should be verified against the full datasheet.