AVR64EA28T-I/SO

Overview

The AVR64EA28T-I/SO 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, 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 temperatures from -40°C to +85°C. Key peripherals include two 16-bit TCA timers, four 16-bit TCB timers, one RTC, three USARTs, one SPI, and one TWI interface. Analog capabilities consist of a 12-bit differential ADC with PGA, a 10-bit DAC, and two analog comparators.

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
• Supports advanced digital peripherals including Configurable Custom Logic (CCL) with Look-up Tables
• Provides single-pin Unified Program and Debug Interface (UPDI) for programming and debugging

Applications

• Industrial control systems requiring precise timing and signal processing
• Battery-powered devices utilizing low-power sleep modes and efficient power management
• Sensor interfaces leveraging high-resolution differential ADC and analog comparators
• Communication gateways using multiple USART and SPI/TWI interfaces

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and temperature grade. Ensure the 'T' suffix indicates tape and reel packaging if required by automated assembly processes. Cross-reference the datasheet revision to confirm all electrical characteristics and pinout configurations match your design requirements before finalizing procurement.

Selection Notes

Select this component when vertical migration within the AVR EA family is needed without code modification. Consider the 28-pin constraint versus higher pin counts in the same series if peripheral availability is critical. Evaluate the 20 MHz maximum frequency against system performance needs and compare the 64 KB Flash capacity with other variants in the family to optimize cost and feature balance.

Part Context

This part belongs to the AVR64EA28/32/48 subset of the broader AVR EA Family. These devices share identical core architectures and peripheral sets, differing primarily in Flash size and pin count. The AVR64EA28 specifically offers 64 KB of Flash in a 28-pin package, providing a compact solution for applications requiring significant program storage without the footprint of larger packages.

Replacement Considerations

AVR64EA28-I/SS

FAQ

What is the maximum operating frequency of the AVR64EA28T-I/SO?

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

Does the device support simultaneous host and client operation on the TWI interface?

Yes, the TWI/I2C interface can operate simultaneously as a host and client on different pins.

What are the available sleep modes for this microcontroller?

The device supports Idle, Standby, and Power-Down sleep modes.