ATXMEGA64D4-MNR

Overview

The ATXMEGA64D4-MNR is an 8/16-bit microcontroller from the AVR XMEGA D4 series, manufactured by Microchip Technology. It features a 32 MHz maximum clock frequency and integrates 64 KB of Flash program memory, 4 KB of SRAM, and 2 KB of EEPROM. The device operates within a supply voltage range of 1.6 V to 3.6 V and supports an operating temperature range of -40°C to +85°C. It utilizes a 44-VFQFN package with exposed pad and provides 34 general-purpose I/O lines. Key peripherals include a 12-channel 12-bit ADC, multiple communication interfaces such as SPI, UART/USART, and I2C, along with internal oscillators.

Feature Summary

• Integrates picoPower technology for low-power operation with full SRAM retention during sleep modes.
• Includes a DMA controller and event system to offload data transfer and inter-peripheral signaling from the CPU.
• Features a high-speed 300 ksps 12-bit analog-to-digital converter for precise signal acquisition.
• Supports various communication protocols including SPI, UART/USART, and I2C for versatile connectivity.

Applications

• Battery-powered thermostats requiring extended life and fast wake-up times
• Building and climate control systems
• Utility meters with RF or ZigBee connectivity

Procurement Notes

Verify the specific suffix 'MNR' against official Microchip documentation to confirm the exact tape-and-reel packaging configuration and moisture sensitivity level. Ensure compatibility with surface-mount assembly processes for the 44-VFQFN package. Cross-reference the part number with current datasheets to validate active status and any recent product change notices affecting material or assembly specifications.

Selection Notes

Select this component when a balance of moderate memory capacity and low power consumption is required in a compact footprint. The XMEGA D4 series offers enhanced peripheral flexibility compared to older generations. Consider the 44-pin QFN package constraints for PCB layout. Evaluate if the 32 MHz speed and 12-bit ADC resolution meet the application's processing and sensing requirements without needing higher-end models.

Part Context

This MCU belongs to the AVR XMEGA D4 family, designed for applications demanding efficient power management and robust peripheral integration. The D4 series distinguishes itself with optimized low-power states while maintaining performance. It serves as a successor to earlier XMEGA variants, offering improved energy efficiency and expanded I/O capabilities within similar physical dimensions, suitable for space-constrained embedded designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Microchip's official cross-reference tools or datasheet footnotes for verified alternatives. Ensure any replacement maintains pinout compatibility and electrical specifications if direct substitution is intended.