AVR64DD28T-E/SS

Overview

The AVR64DD28T-E/SS is an 8-bit microcontroller from the AVR DD family, featuring a 24 MHz AVR CPU with hardware multiplier. It includes 64 KB of 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 extended temperature ranges (-40°C to +125°C). Key peripherals include a 12-bit ADC, 10-bit DAC, three USARTs, two SPI interfaces, and TWI/I2C. It utilizes Multi-Voltage I/O (MVIO) for flexible interfacing and is housed in a 28-pin SSOP package.

Feature Summary

• Multi-Voltage I/O (MVIO) capability on PORT C enables direct communication across different power domains without external level shifters.
• Integrated Event System (EVSYS) allows peripheral-to-peripheral signaling independent of the CPU to reduce latency.
• Configurable Custom Logic (CCL) provides four programmable Look-up Tables (LUTs) for custom digital logic implementation.

Applications

• Industrial control systems requiring robust noise immunity and multi-voltage domain interfacing
• Smart home appliances utilizing low-power sleep modes and real-time control features
• IoT devices needing efficient wireless communication via integrated serial interfaces

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape and reel packaging and 'E' confirms the extended temperature rating (-40°C to +125°C). Confirm that the SSOP package style matches your PCB footprint requirements. Ensure compatibility with the Unified Program and Debug Interface (UPDI) tools used in your development environment before finalizing procurement.

Selection Notes

Select this component when 64 KB of program memory and 8 KB of RAM are required for complex applications. Choose the AVR64DD28T-E/SS over lower-memory variants if code expansion is anticipated. Opt for the 'E' suffix version specifically for environments exceeding standard industrial temperature limits. Verify that the 28-pin count accommodates all necessary I/O connections including MVIO pins.

Part Context

This part belongs to the AVR DD family, which emphasizes vertical migration compatibility. Devices within this family share pinouts and feature sets, allowing designers to scale memory sizes without modifying existing code or hardware layouts. The AVR64DD series represents the high-end capacity options within the 28-pin form factor.

Replacement Considerations

AVR64DD28T-I/SS offers identical specifications but is rated for the industrial temperature range (-40°C to +85°C) instead of the extended range.

FAQ

Does the AVR64DD28T-E/SS support simultaneous host and client operation on its I2C interface?

Yes, the integrated TWI/I2C module supports dual mode operation, allowing it to function as both a host and a client simultaneously on different pins.

What is the maximum operating frequency of the internal oscillator?

The device features a high-precision internal high-frequency oscillator (OSCHF) that can be selected up to 24 MHz, with auto-tuning capabilities for improved accuracy.