AVR64EA28-I/SS

Overview

The AVR64EA28-I/SS 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 1.8V to 5.5V and supports industrial temperature ranges (-40°C to +85°C). Key peripherals include a 12-bit differential ADC with PGA, a 10-bit DAC, two analog comparators, three USARTs, one SPI, and one TWI interface.

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 compare analog comparators.
• Supports true read-while-write operation in Flash memory for uninterrupted code execution during reprogramming.
• Provides advanced digital peripherals including Configurable Custom Logic (CCL) with Look-up Tables.

Applications

• Industrial control systems requiring robust I/O and analog signal conditioning
• Battery-powered devices utilizing low-power sleep modes and efficient power management
• Sensor interfaces leveraging high-resolution ADC and event-driven processing
• Communication gateways using multiple USART and SPI/TWI interfaces

Procurement Notes

Verify the ordering suffix 'I' confirms the industrial temperature range of -40°C to +85°C. Confirm the '/SS' suffix indicates the SSOP-28 package type. Ensure the datasheet version matches the preliminary specification DS40002443A for accurate peripheral details. Cross-reference pinouts for I/O multiplexing requirements before finalizing board layout.

Selection Notes

Select this component when vertical migration within the AVR EA family is required without code modification. Choose based on the need for 64 KB Flash and 6 KB SRAM combined with a 20 MHz clock speed. Consider the availability of specific analog peripherals like the 12-bit ADC and 10-bit DAC for signal processing tasks. Verify that the 28-pin SSOP package fits the physical constraints of the design.

Part Context

This part belongs to the AVR64EA28/32/48 series within the broader AVR EA Family. It shares architectural similarities with AVR16EA and AVR32EA variants but offers higher memory capacity. The device is designed for applications needing a balance of processing power, analog capabilities, and low power consumption in a compact 28-pin form factor.

Replacement Considerations

AVR64EA28-E/SS: Extended temperature range variant (-40°C to +125°C). AVR64EA28T-I/SS: Tape and reel packaging variant instead of tube/tray. AVR64EA32-I/SS: Higher pin count variant with more I/O options.