ATSAMC21J16A-AUT

Overview

The ATSAMC21J16A-AUT is an automotive-grade ARM microcontroller from the Microchip SAM C21 family, featuring an ARM Cortex-M0+ core. It integrates 64 kB of Flash program memory and 8 kB of SRAM data memory within a TQFP-64 package. The device operates at a maximum clock frequency of 48 MHz and supports a supply voltage range of 2.7 V to 5.5 V. It includes 52 general-purpose I/O pins, a 12-bit ADC with 20 channels, and a 10-bit DAC. Communication interfaces include LIN, I2C, PMBus, SPI, and USART. The component is qualified to AEC-Q100 standards for operation between -40°C and +85°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments.
• Integrated analog peripherals including a 12-bit ADC and 10-bit DAC for signal processing.
• Supports multiple serial communication protocols including LIN, I2C, SPI, and USART.
• Operates on a wide voltage range suitable for 5V automotive systems.

Applications

• Automotive body control modules
• Instrument cluster controllers
• Sensor interface units
• LIN bus node implementations

Procurement Notes

Verify the specific suffix AUT confirms AEC-Q100 automotive qualification and the TQFP-64 package type. Confirm the operating temperature range matches the application requirements of -40°C to +85°C. Ensure the 64 kB Flash and 8 kB SRAM configuration meets the software storage needs. Check for moisture sensitivity level handling requirements during assembly.

Selection Notes

Select this part when automotive certification is mandatory and a Cortex-M0+ architecture is sufficient. Compare pin counts against the 52 available I/Os to ensure board layout compatibility. Consider the 48 MHz speed limit for real-time processing constraints. Evaluate if the 20-channel ADC count satisfies sensor input requirements compared to other SAM C21 variants.

Part Context

This component belongs to the Microchip SAM C21 series of low-power ARM-based microcontrollers designed for cost-sensitive applications. The J16 variant specifically denotes the 64 kB Flash memory size within the J-series pinout configuration. The AUT suffix indicates it is the automotive-grade version, distinct from commercial variants like the standard ATSAMC21J16A.

Replacement Considerations

ATSAMC21J16A is the commercial equivalent without automotive qualification. ATSAMC21J17A offers increased memory capacity (128 kB Flash) in the same package. ATSAMC20G16A provides similar performance but with fewer I/O pins in a TQFP-48 package.