ATSAMD21J16B-AF

Overview

The ATSAMD21J16B-AF 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 operates within a temperature range of -40°C to +125°C. It includes 26 I/O lines, an internal oscillator, and interfaces such as I2C, LINbus, SPI, USART, and USB. Data converters include ten 12-bit ADC channels and one 10-bit DAC.

Feature Summary

• Functional Safety (FuSa) qualification under AEC-Q100 standards for automotive reliability
• Extended industrial temperature rating supporting operation up to +125°C
• Integrated analog peripherals including multiple high-resolution ADCs and a DAC

Applications

• Automotive electronic control units requiring functional safety compliance
• Industrial controllers operating in extended temperature environments
• Battery-powered devices utilizing low-power Cortex-M0+ architecture

Procurement Notes

Verify the specific suffix 'AF' confirms the TQFP-32 package and +125°C temperature grade against official Microchip documentation. Confirm RoHS and REACH compliance status directly with the manufacturer or authorized distributors prior to procurement. Ensure design-in compatibility with required automotive quality standards.

Selection Notes

Select this component when automotive-grade reliability and extended temperature performance are mandatory. Compare pin counts and peripheral sets against other SAM D21 variants like the J-series for higher I/O density. Validate that the TQFP-32 package meets PCB layout constraints and thermal management requirements for the target application.

Part Context

This part belongs to the SAM D21 family of low-power 32-bit MCUs. It shares the Cortex-M0+ core and peripheral set with other variants but differs in package type, memory size, and temperature rating. The 'J' designation typically indicates a specific pin count and peripheral configuration within the broader SAM D21 ecosystem.

Replacement Considerations

ATSAMD21J16B-AUT offers the same electrical specifications and temperature range in a TQFP-64 package. ATSAMD21E16B-AF provides similar features in a smaller TQFP-32 package but with fewer I/O lines. Verify pin-to-pin compatibility and software migration efforts before substituting.