AVR32EA28-I/STX

Overview

The AVR32EA28-I/STX is an 8-bit microcontroller from the AVR EA family, featuring a 20 MHz AVR CPU with hardware multiplier. It includes 32 KB of In-system-programmable Flash memory with read-while-write capability, 4 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 differential ADC with PGA, a 10-bit DAC, three USARTs, SPI, TWI/I2C, two TCA timers, four TCB timers, an RTC, and Configurable Custom Logic (CCL).

Feature Summary

• Features a flexible low-power architecture with Event System for CPU-independent inter-peripheral signaling.
• Includes accurate analog subsystems such as a 12-bit differential ADC with programmable gain amplifier and window comparators.
• Supports true read-while-write operation in Flash memory for uninterrupted code execution during reprogramming.
• Integrates advanced digital peripherals including Configurable Custom Logic (CCL) and multiple timer/counters.

Applications

• Industrial control systems requiring robust peripheral interfaces.
• Consumer electronics utilizing low-power architectures.
• Smart energy metering applications with precise analog measurement needs.
• Automotive infotainment and body control modules.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature grade. Ensure compatibility with existing design constraints regarding pin count and peripheral availability. Cross-reference the datasheet revision to confirm feature sets and electrical characteristics match project requirements before finalizing procurement decisions.

Selection Notes

Select this component when a balance of processing speed and peripheral richness is required in a compact 28-pin form factor. Consider the AVR EA family for vertical migration capabilities without code modification. Evaluate the extended temperature range options if operating conditions exceed standard industrial limits. Verify that the available I/O pins and memory sizes align with the specific application demands.

Part Context

This device belongs to the AVR EA family, which shares architectural similarities with other members like the AVR32EA32 and AVR32EA48. These devices offer horizontal and vertical migration paths, allowing designers to scale pin counts and memory sizes while maintaining software compatibility. The family emphasizes low power consumption and high performance through its optimized AVR CPU core.

Replacement Considerations

Direct replacements within the same package and pinout are limited to other variants in the AVR EA family, such as the AVR32EA32 or AVR64EA28, provided pin and feature compatibility is maintained. Verify that any substitute part meets the specific temperature and voltage requirements of the original design.