AVR32DU28-I/SS

Overview

The AVR32DU28-I/SS is an 8-bit microcontroller from the AVR DU family, featuring a 32 KB Flash memory, 4 KB SRAM, and 256 bytes of EEPROM. It operates at clock speeds up to 24 MHz with a supply voltage range of 1.8 V to 5.5 V. The device includes a USB 2.0 full-speed interface, two USARTs, one SPI, and one TWI/I2C controller. It provides up to 21 programmable GPIO pins in a 28-pin SSOP package.

Feature Summary

• Integrates a USB 2.0 full-speed device interface for communication applications
• Includes Configurable Custom Logic (CCL) with four Look-up Tables for custom digital logic implementation
• Features Program and Debug Interface Disable (PDID) for secure firmware protection

Applications

• USB-enabled embedded control systems
• Industrial automation controllers
• Smart energy metering devices

Procurement Notes

Verify the specific datasheet revision DS40002576A when sourcing, as this component is listed under preliminary documentation. Confirm that the SSOP package variant matches your PCB footprint requirements. Ensure compatibility with the UPDI programming interface for development and production flashing.

Selection Notes

Select this model for designs requiring integrated USB connectivity within a compact 28-pin form factor. It serves as a suitable upgrade path from legacy AVR devices due to pin and feature compatibility across the DU family. Consider the 1.8V to 5.5V operating range for flexible power supply architectures.

Part Context

This part belongs to the AVR DU family, which shares architectural similarities with the AVR DD and SD series but focuses on low-power efficiency and advanced analog peripherals. The 'DU' designation indicates the inclusion of the USB peripheral, distinguishing it from other variants in the broader AVR portfolio.

Replacement Considerations

AVR32DU20-I/SS offers similar features with fewer I/O pins. AVR32DU32-I/SS provides additional pins and ADC channels. AVR16DU28-I/SS is a lower-memory alternative within the same package.