Microchip Technology ATSAML21E
ATSAML21E variants from Microchip Technology
ATSAML21E Overview
What changes between part numbers, and what to check before you lock the BOM — Microcontrollers.
Key Features
- Footprint / package: https://www.microchipdirect.com/product/search/all/ATSAML21E15B, https://www.microchipdirect.com/product/search/all/ATSAML21E16B, https://www.microchipdirect.com/product/search/all/ATSAML21E17B, https://www.microchipdirect.com/product/search/all/ATSAML21E18BLand pattern and thermal pad differ between these packages — run a quick footprint check before you swap variants.
- Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
- 7 distinct suffix patternsExamples: 15B, 16B, 17B, 18B, 15B-MUT (+2 more). 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 7 ATSAML21E part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Package Type | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|---|
| ATSAML21E15B | Package: https://www.microchipdirect.com/product/search/all/ATSAML21E15B | Official Price: 2.3800 | Official Product URL: https://www.microchip.com/en-us/product/ATSAML21E15B | https://www.microchipdirect.com/product/search/all/ATSAML21E15B | Microchip Technology | Active | Compliant | In Stock | |
| ATSAML21E16B | Package: https://www.microchipdirect.com/product/search/all/ATSAML21E16B | Official Price: 2.9000 | Official Product URL: https://www.microchip.com/en-us/product/ATSAML21E16B | https://www.microchipdirect.com/product/search/all/ATSAML21E16B | Microchip Technology | Active | Compliant | In Stock | |
| ATSAML21E17B | Package: https://www.microchipdirect.com/product/search/all/ATSAML21E17B | Official Price: 3.0900 | Official Product URL: https://www.microchip.com/en-us/product/ATSAML21E17B | https://www.microchipdirect.com/product/search/all/ATSAML21E17B | Microchip Technology | Active | Compliant | In Stock | |
| ATSAML21E18B | Package: https://www.microchipdirect.com/product/search/all/ATSAML21E18B | Official Price: 4.2900 | Official Product URL: https://www.microchip.com/en-us/product/ATSAML21E18B | https://www.microchipdirect.com/product/search/all/ATSAML21E18B | Microchip Technology | Active | Compliant | In Stock | |
| ATSAML21E15B-MUT | IC MCU 32BIT 32KB FLASH 32QFN | - | Microchip Technology | Active | Compliant | In Stock | |
| ATSAML21E16B-AUT | IC MCU 32BIT 64KB FLASH 32TQFP | - | Microchip Technology | Active | Compliant | In Stock | |
| ATSAML21E18B-AUT | IC MCU 32BIT 256KB FLASH 32TQFP | - | Microchip Technology | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on ATSAML21E map to package, grade, and reel options.
How to Choose the Right ATSAML21E Microcontrollers
Match the footprint first
Packages here: https://www.microchipdirect.com/product/search/all/ATSAML21E15B, https://www.microchipdirect.com/product/search/all/ATSAML21E16B, https://www.microchipdirect.com/product/search/all/ATSAML21E17B, https://www.microchipdirect.com/product/search/all/ATSAML21E18B. Open the land-pattern drawing before you substitute a different suffix.
Electrical headroom
Compare voltage and current columns in the variant table. For ATSAML21E, 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 "ATSAML21E" — include the full suffix (e.g. 15B, 16B, 17B). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for ATSAML21E product family
Identity
Variant Parameters
Source ATSAML21E with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 7 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
Frequently Asked Questions
Common technical questions about the ATSAML21E product family.