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ATSAML21J18B-AUT

MCHPATSAML21J18B-AUT

Microchip Technology
ARM® Cortex®-M0+ SAM L21J, Functional Safety (FuSa) Microcontroller IC 32-Bit 48MHz 256KB (256K x 8) FLASH 64-TQFP (10x10)
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Overview

The ATSAML21J18B-AUT is an ultra-low power 32-bit microcontroller featuring an ARM Cortex-M0+ core operating at 48MHz. This device is specifically engineered for power-sensitive applications, consuming as little as 35uA/MHz in active mode and featuring specialized peripherals for functional safety. With 256KB of Flash and 32KB of RAM, it provides a balanced memory footprint for complex sensor nodes and wearable devices.

Why Choose This Part

This MCU stands out for its extreme power efficiency, featuring a low-power peripheral system (SleepWalking) that allows peripherals to evaluate events without waking the CPU. It supports a wide operating voltage range from 1.62V to 3.63V and includes a Full Speed USB interface without the need for an external crystal. The inclusion of Functional Safety capabilities simplifies compliance for industrial and medical certifications.

Applications

Battery-Powered IoT Sensors
Leveraging ultra-low power consumption and sophisticated sleep modes to extend battery life in remote wireless nodes.
Wearable Health Monitors
The compact TQFP-64 package and low voltage operation (down to 1.62V) make it ideal for biometric tracking devices.
Industrial Safety Controllers
Utilizes Functional Safety (FuSa) features for reliable operation in monitoring and control environments requiring high integrity.
Smart Utility Meters
Integrates diverse communication interfaces like UART, SPI, and I2C for interfacing with metering front-ends and communication modules.

Key Specifications

Speed 48MHz
RAM Size 32K x 8
Core Size 32-Bit
Peripherals DMA, POR, PWM, WDT
Connectivity I2C, LINbus, SCI, SPI, UART/USART, USB
Mounting Type Surface Mount
Number of I/O 51
Core Processor ARM Cortex-M0+
Package / Case 64-TQFP
Data Converters A/D 20x12b; D/A 2x12b
Oscillator Type Internal
Program Memory Size 256KB (256K x 8)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 64-TQFP (10x10)
Voltage - Supply (Vcc/Vdd) 1.62V ~ 3.63V

Getting Started

Evaluation can be performed using the SAM L21 Xplained Pro evaluation kit (ATSAML21-XPRO). Development is fully supported within the Microchip Studio (formerly Atmel Studio) and MPLAB X IDEs, utilizing the Atmel Software Framework (ASF) or MPLAB Harmony for driver configuration. Use a standard SWD debugger such as the ATATMEL-ICE for programming and real-time debugging.

Part of SAM L21 family » ATSAML21J

ATSAML21J Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number RAM Flash Stock
ATSAML21J18B-AUT (this part) 32K 256KB 8,129
ATSAML21J17B-AUT 16K 128KB 7,748

Also Consider

ATSAMD21G18A-AUT MCHPMicrochip Technology - A more common Cortex-M0+ alternative if extreme low-power SleepWalking features are not the primary design requirement.
ATSAML21G18B-AUT MCHPMicrochip Technology - The same SAM L21 core but in a smaller 48-pin TQFP package for designs with lower I/O count requirements.