ATMEGA644A-MU Atmel, ATMEGA644A-MU Datasheet - Page 519
ATMEGA644A-MU
Manufacturer Part Number
ATMEGA644A-MU
Description
IC MCU AVR 64K FLASH 44VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644A-MU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-VQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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8272A–AVR–01/10
Figure 28-333.ATmega1284: Calibrated 8 MHz RC Oscillator vs. V
Figure 28-334.ATmega1284: Calibrated 8 MHz RC Oscillator vs. Temperature
164A/164PA/324A/324PA/644A/644PA/1284/1284P
8.3
8.2
8.1
7.9
7.8
7.7
7.6
7.5
8.6
8.4
8.2
7.8
7.6
7.4
7.2
8
8
-40
1.5
-30
2
-20
-10
2.5
0
3
10
Temperature (°C)
20
V
CC
3.5
(V)
30
40
4
50
4.5
60
CC
70
5
80
5.5
90
-40 °C
5.5 V
3.3 V
2.7 V
1.8 V
85 °C
25 °C
519
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