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Product Detailed Parameters
- Description：64KB, RWW, 6KB RAM, 28P VQFN, 85
- Series：AVR® EA
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Core Processor：AVR
- Core Size：8-Bit
- Speed：20MHz
- Connectivity：I2C, IrDA, SMBus, SPI, UART/USART
- Peripherals：Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O：23
- Program Memory Size：64KB (64K x 8)
- Program Memory Type：FLASH
- EEPROM Size：512 x 8
- RAM Size：6K x 8
- Voltage - Supply (Vcc/Vdd)：1.8V ~ 5.5V
- Data Converters：A/D 20x12b; D/A 1x10b
- Oscillator Type：External, Internal
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：28-VQFN (4x4)
- Package / Case：28-VFQFN Exposed Pad
- Grade：-
- Qualification：-
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Overview
The AVR64EA28T-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 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). It is housed in a 28-pin SSOP package (ST) and supplied in tape and reel format (T). Key peripherals include a 12-bit ADC, 10-bit DAC, three USARTs, SPI, TWI, and an event system.
Feature Summary
- AVR CPU running at up to 20 MHz with single-cycle I/O register access
- True read-while-write operation for Flash memory
- Integrated Event System for CPU-independent peripheral signaling
- Configurable Custom Logic (CCL) with programmable Look-up Tables
Applications
- Industrial control systems requiring low-power architecture
- Sensor interfaces utilizing differential ADC and analog comparators
- Communication nodes using multiple USART and TWI/I2C interfaces
- Applications needing flexible clock options including high-precision internal oscillators
Procurement Notes
Verify that the ordering suffix 'T' corresponds to the Tape & Reel carrier type as specified in the datasheet. Confirm the 'I' suffix indicates the Industrial temperature range (-40°C to +85°C). Ensure the 'ST' package code matches the required 28-pin SSOP form factor. Cross-reference the full part number against the manufacturer's official documentation to confirm availability and preliminary status.
Selection Notes
Select this component when pin compatibility with other AVR EA family devices is required for vertical migration. Choose this model if the application demands a 28-pin footprint with extensive analog peripherals like a 12-bit differential ADC and PGA. Consider this MCU for designs needing simultaneous read and write operations on Flash memory without halting code execution.
Part Context
This device belongs to the AVR® EA Family, which utilizes advanced Microchip technologies for flexible low-power architectures. The family offers horizontal and vertical migration paths, allowing designers to scale pin counts and memory sizes while maintaining code compatibility. The AVR64EA28 variant specifically provides 32 KB of Flash, balancing processing power and storage for embedded applications.
Replacement Considerations
Other members of the AVR EA family, such as the AVR32EA28 or AVR16EA28, are fully pin and feature compatible for vertical migration without code modification. Devices with different Flash sizes may have corresponding SRAM variations.
