ATSAMD21J18A-CUT

Overview

The ATSAMD21J18A-CUT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, manufactured by Microchip Technology. It features 256 KB of Flash memory and 32 KB of SRAM. The device operates at a maximum clock frequency of 48 MHz with a supply voltage range of 1.62 V to 3.63 V. It includes 52 general-purpose I/Os, an internal oscillator, and supports interfaces such as I2C, SPI, USART, USB, and LINbus. The component is housed in a 64-TQFP package and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates a high-performance ARM Cortex-M0+ processor with up to 48 MHz operation speed.
• Provides extensive connectivity options including USB Full-Speed interface alongside standard serial protocols.
• Includes multiple analog peripherals with 12-bit ADC resolution and a 10-bit DAC for signal processing.
• Features low-power management capabilities with various sleep modes and power-down states.

Applications

• Portable consumer electronics requiring low power consumption
• Industrial control systems utilizing LINbus or CAN interfaces
• Medical devices needing precise analog-to-digital conversion
• Smart home automation controllers

Procurement Notes

Verify the specific suffix 'CUT' against official Microchip documentation to confirm it denotes the Cut Tape packaging variant of the ATSAMD21J18A-AU or similar TQFP package. Ensure compatibility with your PCB footprint for the 64-TQFP form factor. Confirm that the voltage and temperature ratings meet your system requirements before finalizing procurement.

Selection Notes

Select this component when a balance of processing power and peripheral richness is needed within a compact 64-pin package. It is suitable for applications requiring USB connectivity without external transceivers. Consider the 1.62V minimum voltage for battery-operated designs. Compare with the SAMD21G series if fewer I/Os are sufficient, or the SAMD21E series for smaller packages.

Part Context

This part belongs to the SAM D21 family of 32-bit ARM Cortex-M0+ microcontrollers. It shares architectural similarities with other SAM D21 variants but offers specific memory sizes and pin counts. The J-series typically indicates a higher pin count and more peripherals compared to E or G series counterparts within the same family.

FAQ

Does the ATSAMD21J18A support hardware cryptographic acceleration?

Yes, the SAM D21 family includes a Hardware Security Module (HSM) for cryptographic operations, although specific availability depends on the exact silicon revision and datasheet specifications.

What is the maximum current per I/O pin?

According to the SAM D21 datasheet, each I/O pin can typically source or sink up to 7 mA, with total limits applying to the entire device.