ATSAMC21G18A-MUT

Overview

The ATSAMC21G18A-MUT is an ARM microcontroller from the ATSAMC21 series, featuring an ARM Cortex-M0+ core. It operates at a maximum clock frequency of 48 MHz and includes 256 kB of in-system programmable flash memory and 32 kB of SRAM. The device provides 38 general-purpose I/Os and supports a supply voltage range of 2.7 V to 5.5 V. It integrates two 12-bit ADCs with 14 channels and a 10-bit DAC. The component is qualified under AEC-Q100 standards for automotive applications and functions within a temperature range of -40°C to +85°C. It is housed in a 48-lead QFN package.

Feature Summary

• Integrates an ARM Cortex-M0+ processor with single-cycle hardware multiplication and a Memory Protection Unit.
• Includes multiple communication interfaces such as SPI, USART, I2C, LIN, and PMBus.
• Features dual 12-bit analog-to-digital converters and a 10-bit digital-to-analog converter.
• Complies with AEC-Q100 qualification requirements for automotive reliability.

Applications

• Automotive body electronics and control modules
• Industrial sensor nodes and data acquisition systems
• Consumer devices requiring low-power processing

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm package type, temperature grade, and tape-and-reel specifications. Ensure compatibility with existing board layouts regarding the QFN-48 footprint and thermal pad requirements. Confirm that the selected variant meets all necessary automotive or industrial certification standards required for the target application environment.

Selection Notes

Select this component when a balance of moderate code storage and high-speed analog conversion is needed within a compact surface-mount form factor. The 48 MHz speed and 32 kB RAM suit applications requiring efficient real-time processing without excessive power consumption. Consider the AEC-Q100 qualification if the design targets automotive environments, ensuring long-term reliability under varying thermal conditions.

Part Context

This part belongs to the ATSAMC21 family, designed for cost-sensitive embedded applications. It shares architectural similarities with other SAM C21 variants but differs in memory size and package options. The G-series designation typically indicates specific pin counts and peripheral sets optimized for general-purpose microcontroller tasks in small packages.

Replacement Considerations

Check for direct substitutes within the ATSAMC21GxxA series with matching memory configurations. Verify pin-to-pin compatibility with alternative packages like TQFP-48 if redesigning the PCB layout is not feasible. Ensure any replacement maintains the same AEC-Q100 qualification status if automotive compliance is mandatory.