ATSAM3N1CA-AU

Overview

The ATSAM3N1CA-AU is a 32-bit microcontroller based on the ARM Cortex-M3 core, operating at a maximum clock frequency of 48 MHz. It features 64 KB of embedded Flash memory and 8 KB of SRAM. The device is housed in a 100-LQFP package with 79 general-purpose I/O pins. It supports an operating voltage range of 1.62 V to 3.6 V and functions within a temperature range of -40°C to +85°C. Peripheral interfaces include I2C, IrDA, SPI, and UART/USART.

Feature Summary

• Integrates an ARM Cortex-M3 processor with Thumb-2 instruction set support for efficient code execution.
• Includes built-in power management features such as Power-on Reset (POR), Brown-out Detection (BOD), and Watchdog Timer.
• Provides direct pin-to-pin compatibility with legacy SAM7S and SAM3S series products for simplified design upgrades.

Applications

• Industrial control systems requiring robust peripheral connectivity
• Consumer electronics utilizing low-power ARM architectures
• Embedded applications needing secure boot and in-application programming capabilities

Procurement Notes

Verify the specific suffix 'AU' corresponds to the lead-free, RoHS-compliant variant in the official Microchip datasheet. Confirm that the 100-LQFP package dimensions match your PCB footprint requirements. Ensure the operating voltage and temperature ranges align with your system's environmental specifications before finalizing procurement.

Selection Notes

Select this component when a balance of moderate program memory and extensive I/O count is required in a single-chip solution. It serves as a suitable upgrade path from older 8-bit or lower-performance 32-bit controllers. Consider the 48 MHz processing speed adequate for standard communication protocols and sensor data acquisition tasks.

Part Context

This part belongs to the SAM3N family, designed for cost-sensitive applications. It shares architectural similarities with the SAM3S series but offers optimized memory configurations. The device integrates essential peripherals for standalone operation without external memory components.

Replacement Considerations

ATSAM3N1CB-AU is a verified substitute within the same series offering identical specifications and pinout compatibility.