Microchip Technology ATSAMC21J

ATSAMC21J variants from Microchip Technology

ATSAMC21J Datasheet

Variants

Mfr

Microchip Technology

Lifecycle

Active

ATSAMC21J Overview

What changes between part numbers, and what to check before you lock the BOM — Microcontrollers.

Key Features

Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
2 distinct suffix patternsExamples: 16A-AUT, 18A-MUT. Decode suffix meaning in the ordering notes under the variant table.

Target Applications

Microcontrollers — design-in and field replacement
BOM scrub where only the base prefix is known but suffix is TBD
Second-source checks when the original MPN is constrained

Ordering Variants

Compare 2 ATSAMC21J part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.

Part Number	Description	Manufacturer	Lifecycle	RoHS	Availability	Action
ATSAMC21J16A-AUT	IC MCU 32BIT 64KB FLASH 64TQFP	Microchip Technology	Active	Compliant	In Stock	RFQ
ATSAMC21J18A-MUT	IC MCU 32BIT 256KB FLASH 64QFN	Microchip Technology	Active	Compliant	In Stock	RFQ

Ordering Code Differences

How suffixes on ATSAMC21J map to package, grade, and reel options.

How to Choose the Right ATSAMC21J Microcontrollers

📦

Match the footprint first

Pull the exact package drawing for your MPN — base-number swaps fail most often at the footprint, not the schematic.

⚡

Electrical headroom

Compare voltage and current columns in the variant table. For ATSAMC21J, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.

🌡️

Temp grade letter matters

Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.

🔢

Copy the full MPN

Do not BOM only "ATSAMC21J" — include the full suffix (e.g. 16A-AUT, 18A-MUT). RFQ with reel/tube preference and required date code.

Technical Specifications

Core parameters for ATSAMC21J product family

Identity

Base Model

ATSAMC21J

Manufacturer

Microchip Technology

Listed Variants

Variant Parameters

Lifecycle Status

Active

RoHS Status

Compliant

Source ATSAMC21J with Octatronics

Request stock confirmation, lead time, date code, and pricing for all 2 ordering variants from Microchip Technology. Our team supports active, EOL, and hard-to-find component sourcing.

Original manufacturer parts with traceability options
BOM upload and multi-line RFQ support
Package, grade, and compliance verification

Request Quote View Microchip Technology Browse all base models →

Frequently Asked Questions

Common technical questions about the ATSAMC21J product family.

Is ATSAMC21J a single part I can order, or a family prefix?

ATSAMC21J is a base / family code from Microchip Technology. You order a full MPN such as ATSAMC21J16A-AUT, ATSAMC21J18A-MUT. The variant table lists 2 orderable lines with different suffixes.

What do the suffix letters on ATSAMC21J part numbers mean?

Listed suffix fragments include: 16A-AUT, 18A-MUT. Typically they encode package (see Package column), temperature grade, and tape/reel option. Always decode on the Microchip Technology datasheet ordering guide — do not guess from pattern alone.

What is the lifecycle status of ATSAMC21J variants?

Lifecycle values in our listing: Active. Status is per MPN suffix — one variant can be Active while another is NRND. Check PCN for your exact suffix before multi-year commitments.

What should I send for an RFQ on ATSAMC21J?

Full manufacturer MPN (not just ATSAMC21J), quantity, needed date code, reel vs tube, and any compliance docs (CoC, RoHS, conflict minerals). If you only know the base prefix, include a photo of the existing label or reel.

Where is the ATSAMC21J datasheet?

Use the datasheet link in the page header. Cross-check electrical curves (SOA, saturation voltage, etc.) against your operating point — the table summarizes order codes, not every graph in the PDF.