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Product Detailed Parameters
- Description：32KB, RWW, 4KB RAM, 28P VQFN, 12
- Series：AVR® EA
- Mfr：Microchip Technology
- Package：Tube
- 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：32KB (32K x 8)
- Program Memory Type：FLASH
- EEPROM Size：512 x 8
- RAM Size：4K 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 ~ 125°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 AVR32EA28-E/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 voltage range of 1.8 V to 5.5 V and supports extended temperature ranges up to +125°C. Key peripherals include a 12-bit ADC with PGA, a 10-bit DAC, three USARTs, SPI, TWI/I2C, and an Event System for inter-peripheral signaling.
Feature Summary
- AVR CPU running at up to 20 MHz with single-cycle I/O register access
- True read-while-write operation in system-programmable Flash memory
- Integrated analog subsystem including a differential ADC with programmable gain amplifier
- Event System enabling CPU-independent peripheral-to-peripheral signaling
Applications
- Real-time control systems requiring low-power architecture
- Sensor nodes utilizing accurate analog subsystems
- Secondary safety monitoring applications
- Industrial and consumer appliance control
Procurement Notes
Verify the specific ordering suffix against official Microchip documentation to confirm package type and carrier configuration. Ensure the component meets the required extended temperature specifications for your application environment. Cross-reference datasheet DS40002497A for complete electrical characteristics and pinout details before finalizing procurement.
Selection Notes
Select this model when extended temperature performance up to +125°C is required alongside standard AVR EA features. Verify that the 28-pin VQFN package fits your board layout constraints. Confirm compatibility with existing codebases if migrating from other AVR EA family members, as vertical migration is supported without modification.
Part Context
This component belongs to the AVR EA family, which shares pin and feature compatibility across different memory sizes. It utilizes the latest Microchip technologies for flexible low-power design. The device integrates advanced digital peripherals and smart analog functions suitable for efficient embedded processing tasks.
Replacement Considerations
Vertical migration within the AVR EA family allows code-compatible upgrades to devices with larger memory footprints. Horizontal migration reduces pin counts and available features. Consult the family overview in the datasheet for compatible alternatives.
