ATSAMD21J18A-MU

Overview

The ATSAMD21J18A-MU is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 series, designed for functional safety applications. It features 256 kB of Flash program memory and 32 kB of SRAM data memory. The device operates with a maximum clock frequency of 48 MHz and supports an input/output count of 52 pins. It includes a 12-bit ADC with 20 channels and five timer/counters. The unit functions within a supply voltage range of 1.62 V to 3.63 V and withstands operating temperatures from -40°C to +85°C. It is housed in a 64-pin QFN package.

Feature Summary

• Integrated AEC-Q100 qualification for automotive reliability standards
• Supports multiple communication interfaces including I2C, SPI, USART, LIN, and I2S
• Includes hardware peripherals such as DMA, power-on reset, and watchdog timer

Applications

• Automotive electronic systems requiring functional safety compliance
• Industrial control devices utilizing LIN bus communication
• General-purpose embedded controllers with analog signal processing needs

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm package type and tape-and-reel versus tray availability. Confirm that the AEC-Q100 qualification status aligns with your project's automotive requirements. Check for any recent product change notices or errata sheets that may affect implementation details.

Selection Notes

Select this component when a low-power 32-bit MCU with automotive-grade certification is required. The SAM D21 architecture provides sufficient processing speed for complex logic while maintaining energy efficiency. Ensure the 52 available I/O pins meet the system connectivity demands before finalizing the design choice.

Part Context

This part belongs to the SAM D21 family of microcontrollers, which are optimized for cost-sensitive and power-efficient applications. The 'J' designation indicates a specific memory configuration within the series. The 'MU' suffix identifies the 64-lead QFN package variant manufactured by Microchip Technology.

Replacement Considerations

The ATSAMD21J18A-MUT serves as a direct alternative offering identical electrical specifications but packaged in tape-and-reel format instead of trays.