AVR64DD28-E/STX

Overview

The AVR64DD28-E/STX is an 8-bit microcontroller from the AVR DD family, featuring a hardware multiplier CPU running at up to 24 MHz. It includes 64 KB of in-system self-programmable Flash memory, 8 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 (-40°C to +85°C) and extended (-40°C to +125°C) temperature ranges. Key peripherals include one 16-bit TCA, three 16-bit TCBs, two USARTs, one SPI, one TWI/I2C, a 12-bit differential ADC with 19 channels, a 10-bit DAC, an analog comparator, and a zero-cross detector.

Feature Summary

• Multi-Voltage I/O (MVIO) on Port C enables bidirectional communication across different power domains without external level shifters.
• Configurable Custom Logic (CCL) provides four programmable Look-up Tables for flexible digital logic implementation independent of the CPU.
• Event System allows predictable inter-peripheral signaling and CPU-independent operation to reduce system latency.
• Automated CRC Flash memory scan enhances application reliability by detecting data corruption.

Applications

• Industrial control systems requiring robust noise immunity and multi-voltage domain interfacing
• Smart home appliances utilizing low-power architectures and precise analog sensing
• IoT devices needing efficient real-time control and secure non-volatile memory features

Procurement Notes

Verify that the ordering suffix 'E' corresponds to the extended temperature range (-40°C to +125°C) and 'STX' indicates the VQFN-28 package. Confirm the specific datasheet revision matches your design requirements. Ensure compatibility with existing development tools supporting the UPDI interface. Check for any regional compliance certifications required for your target market before finalizing procurement.

Selection Notes

Select this component when high pin count flexibility and advanced analog capabilities are needed within a compact 28-pin footprint. The AVR64DD28-E/STX offers vertical migration compatibility within the AVR DD family, allowing code reuse across different memory sizes. Consider its MVIO feature if interfacing with mixed-voltage sensors or actuators. The extended temperature rating makes it suitable for harsh environments where standard industrial parts may fail.

Part Context

This part belongs to the AVR DD family, which emphasizes intelligent analog features and event-driven processing. It shares architectural similarities with other AVR DD variants but distinguishes itself through its specific 64 KB Flash and 8 KB SRAM configuration. The family supports seamless migration between pin counts while maintaining functional compatibility, simplifying product line expansion strategies for designers.

Replacement Considerations

AVR32DD28-I/STX: Lower Flash/SRAM capacity; Industrial temp only. AVR64DD28-I/STX: Extended temp variant replaced by -E suffix version. AVR16DD28-E/STX: Reduced memory size. Verify pinout compatibility and peripheral availability when substituting.