ATSAME51J18A-AFT

Overview

The ATSAME51J18A-AFT is a 32-bit ARM Cortex-M4F microcontroller from the SAM E51 family, manufactured by Microchip Technology. It features a maximum clock frequency of 120 MHz, 256 kB of Flash program memory, and 128 kB of SRAM data RAM. The device operates within a supply voltage range of 1.71 V to 3.6 V and supports an extended industrial temperature range from -40°C to +125°C. It includes 51 general-purpose I/Os, 24-channel 12-bit ADCs, and 2-channel 12-bit DACs. Connectivity options include USB, CAN, LIN, I2C, SPI, and USART interfaces. The component is housed in a 64-pin TQFP package.

Feature Summary

• Integrated floating-point unit (FPU) for efficient mathematical processing
• Automotive-grade qualification compliant with AEC-Q100 standards
• Extended operating temperature range suitable for harsh environments
• Comprehensive peripheral set including DMA, I2S, and multiple communication interfaces

Applications

• Industrial automation controllers requiring robust environmental tolerance
• Automotive electronic control units (ECUs)
• Smart energy metering systems
• Medical instrumentation devices

Procurement Notes

Verify the specific suffix 'AFT' confirms the extended temperature grade (-40°C to +125°C) and tape-and-reel packaging format against the official Microchip datasheet. Ensure compatibility with design-in requirements for automotive or industrial applications, as this variant differs from commercial temperature parts. Confirm pinout and package dimensions match the 64-TQFP specification.

Selection Notes

Select this part when both high performance and wide temperature operation are required. The ATSAME51J18A-AFT provides the same core specifications as commercial variants but ensures reliability in extreme thermal conditions. Consider the AEC-Q100 qualification if the target application mandates automotive industry standards. Evaluate power consumption profiles against system battery life requirements.

Part Context

This component belongs to the SAM E51 series of ARM Cortex-M4F microcontrollers designed for smart energy and industrial applications. It shares architectural similarities with the ATSAMD51 and ATSAME53 families but offers specific memory and peripheral configurations tailored for cost-sensitive yet high-performance embedded solutions. The series emphasizes low power consumption alongside rich connectivity options.

Replacement Considerations

ATSAMD51J18A-AFT: Similar core and memory but lacks automotive qualification. ATSAME51J18A-AU: Commercial temperature grade only. ATSAME53J18A-AUT-EFP: Higher peripheral count and different package.