ATSAML21J17B-UUT

Overview

The ATSAML21J17B-UUT is a Microchip Technology ARM microcontroller from the SAM L21 series, featuring an ARM Cortex-M0+ core. It operates at a maximum clock frequency of 48 MHz and includes 128 kB of Flash program memory and 16 kB of SRAM data RAM. The device supports a supply voltage range of 1.62 V to 3.63 V and offers 51 I/O pins. It integrates a 12-bit ADC with 20 channels and a 12-bit DAC. Connectivity interfaces include I2C, LIN, SPI, USART, and USB. The component is housed in a WLCSP-64 package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates advanced analog peripherals including a 12-bit ADC with multiple channels and a 12-bit DAC for signal processing applications.
• Supports comprehensive communication protocols via integrated serial controllers such as SPI, I2C, USART, and full-speed USB.
• Designed for low-power operation with an internal oscillator and support for various sleep modes suitable for battery-powered devices.

Applications

• Industrial control systems requiring robust communication interfaces
• Consumer electronics utilizing touch sensing or LCD displays
• Wearable devices benefiting from ultra-low power consumption profiles

Procurement Notes

Verify the specific suffix UUT corresponds to the WLCSP-64 package configuration when sourcing. Confirm that the industrial temperature grade (-40°C to +85°C) meets your environmental requirements. Check current availability status as this package type may have limited stock compared to standard QFN variants. Ensure ESD handling procedures are followed due to the wafer-level chip scale packaging sensitivity during assembly.

Selection Notes

Select this model if a compact WLCSP footprint is required instead of the larger QFN or TQFP options available in the same family. Compare pin counts and peripheral availability against the ATSAML21J17B-MUT (QFN) or ATSAML21J17B-AUT (TQFP) to ensure interface compatibility. Verify that the 128 kB Flash and 16 kB RAM sizes suffice for your application firmware before finalizing the part number choice.

Part Context

This component belongs to the SAM L21 family of 32-bit ARM Cortex-M0+ microcontrollers designed for ultra-low-power applications. The family emphasizes energy efficiency while providing rich peripheral sets including touch sensing capabilities and secure connectivity features. The Suffix UUT specifically denotes the Wafer Level Chip Scale Package variant, distinguishing it from other mechanical form factors within the identical electrical specification group.