8-bit AVR RISC microcontroller featuring 64KB Flash program memory and 4KB RAM. This MCU operates at up to 20 MHz, offering 32 programmable I/Os and 3 timers. Connectivity includes SPI and 2 USART interfaces. Designed for a wide operating voltage range of 2.5V to 5.5V, it functions reliably between -40°C and 85°C. The 44-pin TQFP package houses 8 ADC channels.
PackageTQFP
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Technical Specifications
Microchip ATmega644A-AU technical specifications.
General
Family Name
ATmega
Data Bus Width
8bit
Instruction Set Architecture
RISC
Maximum Clock Rate
20MHz
Maximum CPU Frequency
20MHz
Device Core
AVR
Program Memory Type
Flash
Program Memory Size
64KB
RAM Size
4KB
Number of Programmable I/Os
32
Core Architecture
AVR
Programmability
Yes
Number of Timers
3
Interface Type
SPI/USART
CAN
0
I2C
0
SPI
3
Ethernet
0
UART
0
USART
2
USB
0
I2S
0
Max Operating Supply Voltage
5.5V
Min Operating Temperature
-40°C
Max Operating Temperature
85°C
ADC Channels
8
Number of ADCs
Single
Pin Count
44
Package/Case
TQFP
Package Family Name
QFP
Compliance
RoHS
Yes
RoHS Version
2011/65/EU, 2015/863
Datasheet
Microchip ATmega644A-AU Datasheet
Download the complete datasheet for Microchip ATmega644A-AU to view detailed technical specifications.
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