ATSAME51J20A-AU

Overview

The ATSAME51J20A-AU is an ARM Cortex-M4F microcontroller from the Microchip ATSAME51 series, housed in a TQFP-64 package. It features a 32-bit data bus and operates at a maximum clock frequency of 120 MHz. The device includes 1 MB of program memory (Flash) and 256 kB of SRAM data RAM. It supports a supply voltage range of 1.71 V to 3.63 V with I/O voltages at 3.3 V. Key peripherals include 24 ADC channels with 12-bit resolution, 6 timers/counters, and interfaces such as CAN, I2C, I2S, LIN, QSPI, SPI, USART, and USB. It is AEC-Q100 qualified for automotive applications and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated floating-point unit (FPU) within the ARM Cortex-M4F core for enhanced mathematical processing capabilities.
• Extended Flash Performance architecture designed to optimize execution speed and power efficiency.
• Comprehensive connectivity suite including USB, CAN, and multiple serial communication protocols.
• Automotive-grade qualification ensuring reliability under specified environmental conditions.

Applications

• Automotive infotainment systems
• Industrial motor control applications
• Smart energy metering devices

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and tape-and-reel versus tray packaging options. Ensure compatibility with existing design constraints regarding pinout and thermal requirements. Confirm RoHS compliance status and moisture sensitivity level ratings prior to integration into manufacturing processes.

Selection Notes

Select this component when high-performance computing with FPU support is required alongside robust automotive-grade connectivity. Compare memory configurations against similar models like the ATSAME51J19A if lower storage capacity suffices. Evaluate interface needs, specifically the presence of USB and CAN controllers, which distinguish this model from variants lacking these specific peripheral sets.

Part Context

This part belongs to the ATSAME51 family, which targets cost-sensitive embedded applications requiring high performance. It shares architectural similarities with the ATSAMD51 series but offers extended flash performance and specific automotive qualifications. The J20 designation indicates the specific memory configuration and package variant within the broader SAM E5x product line.

Replacement Considerations

ATSAME51J20A-AU-EFP is a verified substitute offering identical electrical specifications with tray packaging instead of tube/tray variations found in standard AU suffixes. ATSAMD51J20A-AU serves as a non-automotive grade alternative with similar core specifications but lacks AEC-Q100 certification.