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Product Detailed Parameters
- Description：IC MCU 8BIT 64KB FLASH 28SSOP
- 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：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 ~ 125°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：28-SSOP
- Package / Case：28-SSOP (0.209", 5.30mm Width)
- Grade：-
- Qualification：-
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Overview
The AVR64EA28-E/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 1.8 V to 5.5 V and supports extended industrial temperatures from -40°C to +125°C. Key peripherals include a 12-bit differential ADC with PGA, a 10-bit DAC, 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 comparators
- Supports true read-while-write operation in system-programmable Flash memory
- Provides advanced digital peripherals including Configurable Custom Logic (CCL) and multiple timer/counters
Applications
- Efficient real-time control systems
- Sensor nodes
- Secondary safety monitoring applications
- Closed-loop control system design
Procurement Notes
Verify the ordering suffix 'E' confirms the extended temperature range (-40°C to +125°C). Confirm the '/SS' designation corresponds to the SSOP-28 package type. Ensure compatibility with the AVR EA family pinout if migrating from other variants. Check datasheet specifications for power consumption levels under active and sleep modes.
Selection Notes
Select this component when high-speed processing up to 20 MHz is required alongside extensive non-volatile memory. The inclusion of a differential ADC with PGA makes it suitable for precision analog signal acquisition. Consider the dual-mode TWI and multiple USARTs for complex communication requirements. Verify that the 28-pin form factor fits the target PCB layout constraints.
Part Context
This part belongs to the AVR64EA28/32/48 series within the broader AVR EA family. These devices are designed for vertical migration without code modification due to full pin and feature compatibility across the family. The AVR64EA28 specifically offers 64 KB Flash and 28 pins, serving as a compact yet powerful option compared to higher pin-count variants.
Replacement Considerations
AVR64EA28-I/SS
FAQ
Does the AVR64EA28 support simultaneous host and client operations on the TWI interface?
Yes, the TWI/I2C interface can operate simultaneously as a host and client on different pins.
What is the maximum clock frequency for the AVR64EA28-E/SS?
The device runs at a maximum clock frequency of 20 MHz.
