# Adafruit Adafruit Feather M4 Express - Featuring Atsamd51 - Atsamd51 Cortex M4 - 3857

**Manufacturer:** ADAFRUIT  
**MPN:** `3857`

The Adafruit Feather M4 Express features a 32-bit ATSAMD51 Cortex M4 core running at 120 MHz, with 3.3V logic and power. It includes 512 KB flash and 192 KB RAM, as well as a 2 MB SPI FLASH chip for storing files and CircuitPython code. The board has no EEPROM and is powered by the ATSAMD51J19 chip.

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | ADAFRUIT |
| Manufacturer name | ADAFRUIT |
| Manufacturer | ADAFRUIT, Adafruit |
| CategoryL1 | Development Boards, Evaluation Tools |
| CategoryL2 | More Semiconductors - Tools |
| Extra Product Name | Adafruit Adafruit Feather M4 Express - Featuring Atsamd51 - Atsamd51 Cortex M4 - 3857 |
| jsonUrlData | Development Boards, Evaluation Tools > More Semiconductors - Tools |
| moq | 1 |
| MPN | 3857 |
| multiple | 1 |
| qtyInStock | 0 |
| SKU | 65AC6983 |
| tierMinQty1 | 1 |
| tierPrice1 | 23.87 |
| url | https://www.newark.com/65AC6983?CMP=AFC-DATAALCHEMY |
| ASIN | B07G2TGMKD |
| AdultProduct | False |
| Amount | 0.00 |
| Asin | B07G2TGMKD |
| Autographed | False |
| Batteries_included | False |
| Batteries_required | False |
| Binding | Electronics, Personal Computers |
| Brand | Adafruit |
| CPUSpeed | 120 |
| ClassificationId | 17441247011 |
| Connectivity_technology | USB |
| Currency | USD |
| CurrencyCode | USD |
| DisplayName | Single Board Computers |
| Height | 0.1968503935, 0.3, 375, 56, 6.6, 900 |
| Identifier | 6252501671690 |
| IdentifierType | EAN |
| IsDeadAsin | True |
| ItemClassification | BASE_PRODUCT |
| ItemName | Adafruit Feather M4 Express - ATSAMD51 Cortex |
| Item_name | Adafruit Feather M4 Express - ATSAMD51 Cortex |
| Item_package_weight | 0.008 |
| Item_type_keyword | single-board-computers |
| Item_weight | 0.01 |
| Keyword | 3857 |
| Label | Adafruit |
| Length | 0.5, 2.0, 2.5984251942 |
| Link | https://m.media-amazon.com/images/I/41XrhiGy48L._SL75_.jpg, https://m.media-amazon.com/images/I/41XrhiGy48L.jpg, https://m.media-amazon.com/images/I/41YxUcDKHNL._SL75_.jpg, https://m.media-amazon.com/ |
| List_price | 0.0 |
| Memorabilia | False |
| Memory_storage_capacity | 512.0 |
| Model | 3857 |
| ModelNumber | 3857 |
| Model_number | 3857 |
| Mpns | 3857 |
| PartNumber | 3857 |
| Part_number | 3857 |
| ProcessorCount | 1 |
| Processor_count | 1 |
| ProductCategoryId | 17441247011 |
| ProductGroup | PC Accessory, Personal Computer |
| ProductType | SINGLE_BOARD_COMPUTER |
| ProductTypeName | PERSONAL_COMPUTER, SINGLE_BOARD_COMPUTER |
| Product_description | <p>Key Features:</p><ul><li>ATSAMD51 32-bit Cortex M4 core running at 120 MHz, 32-bit, 3.3V logic and power</li><li>Floating point support with Cortex M4 DSP instructions</li><li>512 KB flash, 192 KB  |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Newark | 65AC6983 | 23.87 | 1 | None | 1 |
| Allied Electronics | 71458403 |  |  | None | 1 |
| Digi-Key | 1528-2648-ND |  |  | 437 | 1 |
| Digi-Key | 9553567 | 22.95 | 1 | 718 | 1 |
| Mouser | 485-3857 | 22.95 | 1 | 670 | 1 |
| Adafruit Industries | 3857 | 22.95 | 1 | None | 1 |
| electromaker.io | 485-3857 | 22.95 | 1 | 1551 | 1 |
| us.rs-online.com | 71458403 | 22.95 | 1 | None | 1 |
| ebay.com_www_paradisetronic_com | 3857 | 137.19 | 1 | None | 1 |
| ebay.com | 3857 |  |  | None | 1 |

---
Structured data: `/python/html6/product/500/28500000/28770500/part_--3857---ADAFRUIT--2fdd995f17.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp