Power-Up PCBA #2 October: SAMD21 ICs for Just $1.50 with Seeed Fusion PCB Assembly
October’s PCBA power-up has come early in the form of massive discounts on the ATSAMD21G18A, a member of the SAMD21 family of Arduino programmable, low-power microcontrollers as part of our campaign to improve our turnkey PCB Assembly offerings.

Almost a decade ago, Seeed Fusion introduced the PCBA Open Parts Libraries and since then, it has been serving the PCBA community with heapings of convenience and cost savings. More recently, Seeed Fusion hit a milestone, increasing the catalog from several thousand to over 150,000 different parts, boosting accessibility and enabling thousands of users to take advantage of lower costs and accelerated turnkey PCBA.
Then, with the positive reception and uptake of the Seeeduino XIAO, based on the ATSAMD21G18A, Seeed released the Seeeduino XIAO Hardware Development Kit (HDK). This has enabled developers to accelerate development with SAMD21 and since then several crowdfunding campaigns and products have been announced.
Enabling hardware development is part of Seeed’s ethos and bloodline. So now, we are going further and combining the two:
Please welcome ATSAMD21G18A-MU to the Seeed Open Parts Library.
And to celebrate the new addition, we are offering the SAMD12 chip at the special price of $1.50 USD, regardless of the number of units.
Due to the pandemic and the global chip shortage, SAMD21 chips are currently out of stock until August 2021. Until then, the chip will not be available in the OPL. Thank you for your understanding and please get in touch if you need assistance.

What does that mean? As with all PCBA OPL parts, these parts are available locally, often at much lower prices, so there is no waiting around for these parts to be imported. Furthermore, as a Seeed OPL part, Seeed maintains the stock and purchases in bulk, which means savings can be passed onto customers, hence the special price.
Accelerate your PCBA journey with the Seeed Fusion turnkey PCB Assembly service. Get an online quotation in minutes with the smart platform here and add extra services such as functional testing for complete peace of mind.
Add the ATSAMD21 chip to your Bill of Materials (BOM) by either including the full MPN in your Seeed BOM, or the Seeed SKU directly. The smart quotation platform will automatically read this from the OPL and show the discounted price and faster procurement time. More part details below.

Download the datasheet and check out other parts in the OPL here.
Check out the first PCBA Power-Up in the form of free Design for Assembly review for all PCBA orders. Don’t forget to stay tuned for the next Power-Up PCBA announcement.
Part Details:
Atmel ATSAMD21G18A-MU (48 pin QFN)
The Atmel’s ATSAMD21 is a low-power, high-performance Microchip’s ARM® Cortex®-M0+ based flash microcontroller as used in the Seeeduino XIAO, Seeeduino Cortex-M0+ and Arduino Zero. In a snapshot, it is more powerful than the ATmega328p and is an amicable upgrade all-around. Here are some specifics:
- 256KB of flash and 32KB of SRAM
- 48MHz Operating Frequency
- Full Speed USB device and embedded host
- Support for up to 120 touch channels
- 1.62V to 3.63V power supply
- Six serial communication modules (SERCOM) configurable as UART/USART, SPI or I2C, three 16-bit timer/counters, 32-bit Real-Time Clock and calendar, 20 PWM channels, one 14-channel 12-bit ADC, one 10-bit DAC. For more information regarding SAMD21, check this out.

Attention! For the first time ever, we’re bringing you free functional testing of 1 piece for every PCBA order. Seeed Fusion functional testing ensures the quality of PCBA products and avoids delays in product release due to rework. Come and get the first try!
We are always trying to improve the PCBA service we deliver to our customers: