ATSAMC21J18A-UUT

Overview

The ATSAMC21J18A-UUT is an ARM microcontroller from the Microchip SAM C21 series, featuring a 32-bit ARM Cortex-M0+ core. It integrates 256 kB of Flash program memory and 32 kB of SRAM data RAM. The device supports a maximum clock frequency of 48 MHz and operates within a supply voltage range of 2.7 V to 5.5 V. It includes dual 12-bit ADCs with 20 channels and a 10-bit DAC. The component is housed in a 56-ball WLCSP package, offers 52 I/O pins, and is qualified to AEC-Q100 standards for automotive applications, functioning between -40°C and +85°C.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for robust performance in vehicle environments.
• High-speed processing capability driven by a 32-bit ARM Cortex-M0+ core operating up to 48 MHz.
• Advanced analog conversion capabilities with dual 12-bit ADCs and multiple input channels for precise signal acquisition.
• Integrated communication interfaces including SPI, USART, I2C, LIN, and PMBus for versatile system connectivity.

Applications

• Automotive body electronics and control modules
• Industrial sensor nodes and monitoring systems
• Consumer devices requiring high reliability and low power consumption

Procurement Notes

Verify the specific suffix UUT confirms the 56-ball WLCSP packaging and tape-and-reel shipping format. Confirm that the AEC-Q100 qualification aligns with your project's automotive grade requirements. Ensure the 5V operation range matches your system power design. Check for any recent product change notices regarding assembly or testing flows.

Selection Notes

Select this model when automotive certification is mandatory alongside a compact WLCSP footprint. It is suitable for designs needing 5V tolerance without external level shifters. Compare against the ATSAMC21J18A-AUT if a TQFP package is preferred for prototyping ease. Consider the ATSAMC21J18A-MNT if a higher temperature rating of 105°C is required.

Part Context

This part belongs to the Microchip SAM C21 family, designed for functional safety and general-purpose embedded control. It shares the core architecture with other J18 variants but differs in package type and thermal rating. The UUT suffix specifically denotes the wafer-level chip scale package configuration optimized for space-constrained PCB layouts.

Replacement Considerations

ATSAMC21J18A-AUT (64-TQFP package)

FAQ

What is the maximum operating temperature for the ATSAMC21J18A-UUT?

The maximum operating temperature is +85°C, as specified for the commercial/automotive grade variant in the WLCSP package.

Does this microcontroller support LIN bus communication?

Yes, the ATSAMC21J18A-UUT includes hardware support for LIN bus communication among its available serial interfaces.

How many analog-to-digital converter channels are available?

The device features 20 ADC channels accessible through its dual 12-bit ADC peripherals.