AVR64EA28-E/STX

Overview

The AVR64EA28-E/STX is an 8-bit microcontroller from the AVR EA family, featuring a 20 MHz AVR CPU with hardware multiplier. It includes 64 KB of Flash memory with read-while-write capability, 6 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 extended industrial temperatures (-40°C to +125°C). Key peripherals include a 12-bit differential ADC with PGA, a 10-bit DAC, two analog comparators, three USARTs, SPI, TWI, and an event system.

Feature Summary

• Features a flexible low-power architecture with an 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 compare functions.
• Supports vertical migration without code modification across the AVR EA family due to full pin and feature compatibility.
• Provides advanced digital peripherals including Configurable Custom Logic (CCL) and multiple timer/counters.

Applications

• Real-time control systems
• Sensor nodes
• Secondary safety monitoring applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm package type and temperature grade. Ensure the component matches the required environmental specifications for the target application. Cross-reference the part number with official Microchip Technology documentation to validate authenticity and revision status before procurement.

Selection Notes

Select this model when high-density non-volatile memory and precise analog capabilities are required in a compact 28-pin form factor. The extended temperature rating makes it suitable for demanding industrial environments. Consider the availability of the Event System and CCL for reducing CPU load in complex logic tasks.

Part Context

This component belongs to the AVR EA family, which utilizes the latest technologies from Microchip Technology. The family offers scalable memory options and consistent peripheral sets across different pin counts, facilitating design flexibility and board layout optimization for various embedded solutions.

Replacement Considerations

AVR64EA32-E/STX

FAQ

Does the AVR64EA28 support simultaneous reading and writing to Flash memory?

Yes, the device features true read-while-write operation for its In-system-programmable Flash memory.

What is the maximum operating frequency of the AVR CPU in this MCU?

The AVR CPU runs at clock speeds up to 20 MHz.