ATSAMD20J18A-CNT

Overview

The ATSAMD20J18A-CNT is a 32-bit microcontroller from the Microchip SAM D20J series, featuring an ARM Cortex-M0+ core. It integrates 256 kB of Flash program memory and 32 kB of SRAM data memory. The device operates within a supply voltage range of 2.7 V to 5.5 V and supports a maximum clock frequency of 48 MHz. It is housed in a 64-pin UFBGA package with dimensions of 5x5 mm. The component includes 52 general-purpose I/O pins and supports interfaces such as I2C, SPI, and USART.

Feature Summary

• Integrates high-density non-volatile Flash memory for code storage alongside static RAM for data handling.
• Supports multiple serial communication protocols including I2C, SPI, and USART for peripheral connectivity.
• Features a 12-bit analog-to-digital converter with multiple channels for signal acquisition.
• Includes built-in power management peripherals such as brown-out detection and reset circuits.

Applications

• Industrial control systems requiring robust communication interfaces
• Consumer electronics utilizing low-power ARM Cortex-M0+ processing
• Embedded sensor nodes with analog input requirements

Procurement Notes

Verify the specific suffix CNT corresponds to the 64-UFBGA (5x5) package configuration when sourcing. Confirm that the operating temperature range aligns with industrial specifications if required for harsh environments. Ensure compatibility with standard surface-mount assembly processes for small outline packages. Cross-reference the datasheet for moisture sensitivity levels and reflow soldering profiles to prevent damage during manufacturing.

Selection Notes

Select this model when a balance of moderate memory capacity and versatile connectivity is needed within a compact footprint. The 5V tolerant operation simplifies interface design with legacy logic. Consider the UFBGA package constraints regarding PCB real estate and thermal dissipation compared to QFN or TQFP alternatives. Evaluate pin count availability against application I/O requirements before finalizing the part number.

Part Context

This component belongs to the SAM D20 family, designed for cost-sensitive applications requiring efficient code execution. It shares architectural similarities with the SAM D21 but offers reduced peripheral sets and memory sizes. The J-series designation typically indicates specific pinout and feature configurations optimized for general-purpose microcontroller tasks without advanced USB or CAN capabilities found in other sub-families.

FAQ

What is the maximum operating speed of the ATSAMD20J18A-CNT?

The microcontroller supports a maximum system clock frequency of 48 MHz.

Does the ATSAMD20J18A-CNT include a digital-to-analog converter?

Yes, the datasheet specifies the inclusion of one 10-bit DAC channel.