ATSAML21G18B-AUT

Overview

The ATSAML21G18B-AUT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, operating at a maximum clock frequency of 48 MHz. It features 256 KB of program memory and 32 KB of SRAM data memory. The device is housed in a 48-pin TQFP package with 37 available I/O lines. It supports an operating voltage range from 1.6 V to 3.6 V and functions within a temperature range of -40 °C to +105 °C. Integrated peripherals include ADC, DAC, DMA, USB, SPI, I2C, LIN, and USART interfaces.

Feature Summary

• Integrates a high-performance ARM Cortex-M0+ processor core for efficient code execution.
• Includes comprehensive connectivity options such as USB, SPI, I2C, LIN, and USART interfaces.
• Features integrated analog capabilities including ADC and DAC converters.
• Supports direct memory access (DMA) to reduce CPU overhead during data transfers.

Applications

• Industrial control systems requiring robust communication interfaces
• Consumer electronics utilizing low-power ARM-based processing
• Embedded applications needing USB connectivity and analog signal processing

Procurement Notes

Verify the specific suffix 'ANT' or 'AUT' against official Microchip documentation, as these indicate distinct temperature ranges and packaging variants. Confirm RoHS compliance status directly from the manufacturer's datasheet. Ensure the selected variant matches the required operating temperature and pinout configuration for the target PCB design before finalizing procurement orders.

Selection Notes

Select this component when a balance of moderate memory capacity and extensive peripheral integration is required. The 48 MHz speed suits general-purpose control tasks. Compare against other SAML21 series members if higher flash memory or different package constraints are necessary. Verify that the 3.3V I/O voltage levels align with the system's logic requirements.

Part Context

This part belongs to the Microchip SMART SAML21 family of microcontrollers. These devices are designed for cost-sensitive applications demanding ARM Cortex-M0+ performance. The G-series typically offers mid-range memory configurations compared to the J-series, targeting compact embedded solutions with essential connectivity features.

Replacement Considerations

ATSAML21G18B-ANT: Identical electrical specifications but rated for industrial temperature range (-40°C to +85°C). ATSAMD21G18A: Similar architecture but lacks some advanced security features found in the SAM L21 series.