ATSAM3N1CB-AU

Overview

The ATSAM3N1CB-AU is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum frequency of 48MHz. It features 64KB of in-system programmable flash memory and 8KB of SRAM. The device includes an internal oscillator and supports a supply voltage range of 1.62V to 3.6V. Connectivity options include I2C, IrDA, SPI, and UART/USART interfaces. Peripheral functions encompass DMA, PWM, WDT, POR, and brown-out detection/reset. It offers 79 general-purpose I/Os and integrates 16-channel 10-bit ADC and one 10-bit DAC. The component is housed in a 100-LQFP package with dimensions of 14x14mm.

Feature Summary

• Integrates ARM Cortex-M3 processor for efficient 32-bit code execution
• Provides flexible connectivity via multiple serial communication interfaces
• Supports direct memory access for high-speed data transfer operations
• Includes integrated analog-to-digital and digital-to-analog converters

Applications

• Industrial control systems requiring robust peripheral management
• Consumer electronics utilizing low-voltage power supplies
• Medical devices needing precise analog signal processing capabilities
• Smart home automation controllers with multiple sensor inputs

Procurement Notes

Verify the specific suffix 'AU' confirms the lead-free RoHS compliant packaging and industrial temperature rating. Confirm the manufacturer designation as Atmel or Microchip Technology depending on the current supply chain status. Ensure the 100-LQFP footprint matches the target PCB design constraints. Check for any recent product change notices regarding assembly sites or marking changes that may affect long-term availability.

Selection Notes

Select this component when a balance of moderate flash capacity and extensive I/O count is required within a 100-pin form factor. Consider the internal oscillator if external crystal resources are limited. Evaluate the 48MHz speed against application latency requirements. Compare RAM size against complex algorithm needs. Verify compatibility with existing development tools and software frameworks designed for the SAM3N series architecture.

Part Context

This part belongs to the SAM3N family of microcontrollers, which are designed for cost-sensitive applications requiring ARM Cortex-M3 performance. The family shares common peripheral sets and instruction set architectures, facilitating migration between different memory configurations. The ATSAM3N1CB-AU represents a mid-range configuration within the LQFP-100 package offerings, providing a specific trade-off between pin count and storage capacity compared to smaller or larger variants.

Replacement Considerations

ATSAM3N1CA-AU is a documented alternative within the same series offering identical functional specifications and memory layout.