AVR128DB28T-E/SO

Overview

The AVR128DB28T-E/SO is an 8-bit microcontroller from the AVR DB family, featuring a 24 MHz AVR CPU with hardware multiplier. It includes 128 KB of Flash memory, 16 KB of SRAM, and 512 bytes of EEPROM. The device operates within a supply voltage range of 1.8V to 5.5V and supports industrial (-40°C to +85°C) and extended (-40°C to +125°C) temperature ranges. It utilizes a 28-pin SOIC package and provides up to 22 general-purpose I/O pins.

Feature Summary

• Supports multi-voltage I/O (MVIO) on Port C for flexible interfacing.
• Integrates advanced analog subsystems including a 12-bit ADC, DAC, op amps, and zero-cross detectors.
• Features a configurable event system for CPU-independent peripheral signaling.
• Includes a unified program and debug interface (UPDI) for simplified programming.

Applications

• Industrial control systems requiring robust analog signal conditioning
• Smart energy metering applications utilizing zero-cross detection
• Motor control designs leveraging PWM timers and op-amp configurations
• Low-power embedded devices using multiple sleep modes

Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature grade (+125°C max) and 'SO' denotes the SOIC package. Confirm the 'T' prefix signifies tape and reel packaging suitable for automated assembly. Ensure the datasheet revision matches the design requirements for electrical characteristics.

Selection Notes

Select this variant when extended temperature operation is required alongside high memory capacity. The SOIC package offers through-hole compatibility alternatives in the same pinout family. Consider vertical migration within the AVR DB family if future pin count adjustments are needed without code modification.

Part Context

This component belongs to the AVR128DB28/32/48/64 series within the broader AVR DB family. It shares architectural similarities with other members like the AVR64DB28 but offers double the Flash and SRAM capacity. The family emphasizes low-cost, small-package solutions with enhanced analog capabilities compared to previous AVR generations.

Replacement Considerations

AVR128DB28-E/SS: Same core specifications but housed in an SSOP package instead of SOIC.

FAQ

Does the AVR128DB28T-E/SO support simultaneous master and slave TWI operations?

Yes, the device includes two TWI interfaces that can operate simultaneously as master and slave on different pins.

What is the maximum clock frequency for the internal oscillator?

The high-precision internal oscillator (OSCHF) supports selectable frequencies up to 24 MHz.

Is the Event System available for inter-peripheral communication?

Yes, the device features an Event System with dedicated channels for CPU-independent and predictable signaling between peripherals.