ATSAMD21J18A-AZT5822

Overview

The ATSAMD21J18A-AZT5822 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 flash memory and 32 KB of SRAM. The device provides 52 I/O pins and includes a 12-bit ADC with 20 channels and a 10-bit DAC. It supports communication interfaces including USB, SPI, I2C, UART/USART, and LINbus. The unit operates within a voltage range of 1.62V to 3.63V and functions across an extended temperature range of -40°C to 125°C.

Feature Summary

• Hosts the MXT5822TD-AB chipset for capacitive touch applications
• Designed specifically for automotive environments
• Integrates DMA and multiple peripheral controllers

Applications

• Automotive human-machine interface systems
• Capacitive touch controller host
• In-vehicle infotainment control units

Procurement Notes

Verify the specific suffix AZT5822 against official Microchip documentation to confirm automotive qualification status and extended temperature ratings. Ensure compatibility with the intended MXT5822TD-AB chipset variant before procurement. Confirm package availability and lead times directly with authorized distributors as this specialized part may require factory ordering.

Selection Notes

Select this component when a dedicated host processor is required for the MXT5822TD-AB touch controller in automotive settings. The 48MHz speed and extensive I/O count support complex UI interactions. Verify that the 64-TQFP package fits the PCB layout constraints and that the 125°C operating temperature meets the specific vehicle zone requirements.

Part Context

This model belongs to the SAM D21J series of functional safety microcontrollers from Microchip Technology. It shares the core architecture with standard SAM D21 devices but includes specific packaging or configuration suffixes tailored for automotive integration. The J-series designation indicates a higher pin count and memory capacity compared to smaller variants in the family.

Replacement Considerations

The ATSAMD21J18A-AZ5822 is a related variant within the same product line. Cross-reference pinouts and software libraries to ensure compatibility. Standard SAMD21J18A models lack the specific automotive suffix and may not meet the required environmental specifications.