AVR128DB28T-I/SS

Overview

The AVR128DB28T-I/SS 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, 16 KB of SRAM, and 512 bytes of EEPROM. The device operates within a supply voltage range of 1.8 V to 5.5 V and supports industrial temperature ranges (-40°C to +85°C). Key peripherals include a 12-bit ADC, 10-bit DAC, three analog comparators, and multiple timers. It utilizes a 28-pin SSOP package.

Feature Summary

• Features Multi-Voltage I/O (MVIO) on Port C for flexible logic level interfacing.
• Includes an advanced analog subsystem with op amps and zero-cross detectors.
• Supports CPU-independent inter-peripheral signaling via the Event System.
• Integrates Configurable Custom Logic (CCL) Look-up Tables for digital logic implementation.

Applications

• Motor control applications utilizing zero-cross detection and PWM generation.
• Industrial sensor interfaces requiring multi-voltage I/O compatibility.
• Battery-powered devices leveraging low-power sleep modes and auto-tuning oscillators.
• Smart energy metering systems using high-precision analog signal conditioning.

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm that the '-I' suffix corresponds to the required industrial temperature range specifications for your application environment. Ensure the pinout matches the 28-pin SSOP form factor during PCB layout finalization.

Selection Notes

Select this model if 128 KB of program memory is required alongside a 28-pin footprint. Consider the AVR128DB28T-E/SS variant if extended temperature operation up to 125°C is necessary. Evaluate the non-tape version AVR128DB28-I/SS if manual placement or tube-based assembly processes are preferred over automated reel feeding.

Part Context

This component belongs to the AVR128DB series, which offers vertical migration capabilities without code modification across different pin counts and memory sizes within the same family. It shares architectural similarities with other AVR DB devices but provides specific memory and peripheral configurations tailored for compact designs requiring robust analog capabilities.

Replacement Considerations

AVR128DB28T-E/SS

FAQ

Does the AVR128DB28T-I/SS support simultaneous master and slave TWI operations?

Yes, the device includes Two-Wire Interface (TWI) modules capable of operating independently as both master and slave on different pins.

What is the maximum clock frequency for the internal oscillator?

The high-precision internal oscillator (OSCHF) can be configured to run at frequencies up to 24 MHz.

How many general-purpose I/O pins are available on the 28-pin package?

The 28-pin variant provides up to 22 programmable general-purpose I/O pins.