AVR16EA28T-I/STX

Overview

The AVR16EA28T-I/STX is an 8-bit microcontroller from the AVR EA family, featuring a 20 MHz CPU with hardware multiplier. It includes 16 KB of Flash memory with read-while-write capability, 2 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, two analog comparators, three USARTs, SPI, TWI/I2C, and an event system for inter-peripheral signaling.

Feature Summary

• Features a flexible low-power architecture with an Event System for predictable, CPU-independent peripheral signaling.
• Includes accurate analog subsystems such as a 12-bit differential ADC with programmable gain amplifier and window compare capabilities in analog comparators.
• Supports true read-while-write operation on Flash memory, allowing code execution while reprogramming other memory sections.
• Integrates Configurable Custom Logic (CCL) with multiple Look-up Tables for complex digital logic implementation without CPU intervention.

Applications

• Industrial control systems requiring robust analog signal processing
• Battery-powered devices utilizing low-power sleep modes and efficient power management
• Smart sensors and IoT nodes using event-driven architectures
• Motor control applications leveraging PWM generation and input capture features

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape and reel packaging and '-I' denotes the industrial temperature range. Confirm that the STX package designation corresponds to the required VQFN form factor. Ensure compatibility with existing UPDI programming tools and verify that the preliminary datasheet status does not impact final production specifications for your application timeline.

Selection Notes

Select this component when vertical migration within the AVR EA family is needed without code modification. Choose this part if the design requires a balance of moderate Flash size (16 KB) and extensive analog peripherals like the 12-bit ADC and DAC. Consider the 28-pin VQFN package constraints for board space and ensure the 20 MHz maximum frequency meets the processing requirements.

Part Context

This device belongs to the AVR EA family, which shares pin and feature compatibility across different memory sizes. It is designed for applications needing advanced digital peripherals and precise analog control. The family supports seamless migration between 16 KB, 32 KB, and 64 KB Flash variants, allowing designers to scale solutions based on memory needs while maintaining software compatibility.

Replacement Considerations

AVR32EA28T-I/STX and AVR64EA28T-I/STX are vertically compatible replacements offering higher memory capacities. For lower memory requirements, AVR16EA28T-E/STX provides extended temperature range options. Ensure that any substitute maintains the same package type and voltage specifications.