AVR32DD28T-I/STX

Overview

The AVR32DD28T-I/STX is an 8-bit microcontroller from the AVR DD family, featuring a 24 MHz AVR CPU with hardware multiplier. It includes 32 KB of Flash memory, 4 KB of SRAM, and 256 bytes of EEPROM. The device operates within a supply voltage range of 1.8 V to 5.5 V and supports industrial temperatures from -40°C to +85°C. It provides up to 22 programmable I/O pins in a VQFN-28 package.

Feature Summary

• Multi-Voltage I/O (MVIO) capability on PORT C for interfacing with different power domains
• Configurable Custom Logic (CCL) with four Look-up Tables for custom digital logic implementation
• Event System (EVSYS) enabling peripheral-to-peripheral communication without CPU intervention
• Integrated analog peripherals including a 12-bit ADC, 10-bit DAC, Analog Comparator, and Zero-Cross Detector

Applications

• Industrial control systems requiring multi-voltage signal interfacing
• Smart home appliances utilizing low-power architectures
• Automotive applications meeting ISO 26262 safety standards
• IoT devices leveraging event-driven processing

Procurement Notes

Verify that the ordering suffix 'T' corresponds to Tape & Reel packaging as defined in the datasheet designation table. Confirm the 'I' suffix indicates the Industrial temperature range (-40°C to +85°C). Ensure the STX suffix matches the required VQFN-28 package style for your PCB layout.

Selection Notes

Select this part when 32 KB of program memory and 4 KB of RAM are sufficient for the application logic. The MVIO feature is critical if the design requires direct connection to 5V peripherals while the core operates at lower voltages. Consider the TCB timer count and ADC channel availability against specific sensor requirements.

Part Context

This component belongs to the AVR DD family, which offers vertical migration compatibility with other members like the AVR32DD20 and AVR32DD32. These devices share identical pinouts and features, allowing code reuse across different pin counts and memory sizes within the same series.

Replacement Considerations

AVR32DD28-I/STX serves as a tube-packaged equivalent. AVR32DD20T-I/SO is a compatible alternative with fewer pins and channels.