ATSAMD21J16B-MUT

Overview

The ATSAMD21J16B-MUT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, operating at a maximum frequency of 48MHz. It features 64KB of Flash memory and 8KB of SRAM. The device supports a supply voltage range of 1.62V to 3.6V and includes an internal oscillator. Connectivity options include I2C, LINbus, SPI, UART/USART, and USB interfaces. It provides 52 general-purpose I/Os and integrates peripherals such as DMA, I2S, PWM, and watchdog timers. The unit is housed in a 64-QFN (9x9) package with exposed pad.

Feature Summary

• Functional Safety (FuSa) certified for automotive applications
• Integrated analog-to-digital converter with 20 channels at 12-bit resolution
• Includes a single 10-bit digital-to-analog converter
• Supports low-power operation modes via power management controls

Applications

• Automotive infotainment systems
• Instrument cluster displays
• Body control modules
• Sensor hubs in connected vehicles

Procurement Notes

Verify the specific suffix 'MUT' corresponds to the 64-QFN package and tape-and-reel orientation required for your assembly line. Confirm that the Functional Safety qualification meets the target Automotive Safety Integrity Level (ASIL) requirements for your specific application context. Check the latest errata sheet for any silicon revisions affecting peripheral behavior or electrical characteristics before finalizing production designs.

Selection Notes

Select this component when functional safety certification is mandatory for the end product. Choose this part over non-FuSa variants if regulatory compliance requires documented safety mechanisms. Ensure the 64-pin QFN footprint fits within the available PCB area. Verify that the 48MHz clock speed and 64KB memory capacity are sufficient for the intended firmware complexity and real-time processing demands.

Part Context

This device belongs to the SAM D21J family, which is specifically designed for automotive environments requiring high reliability. Unlike standard consumer-grade MCUs, this series undergoes rigorous testing to meet automotive quality standards. It shares architectural similarities with other SAM D21 variants but distinguishes itself through its FuSa certification and specific pinout configuration optimized for vehicle networking.

Replacement Considerations

ATSAMD21J16A-MUT: Non-functional safety variant with identical pinout and specifications.