ATMEGA644A-AU Atmel, ATMEGA644A-AU Datasheet - Page 544
ATMEGA644A-AU
Manufacturer Part Number
ATMEGA644A-AU
Description
IC MCU AVR 64K FLASH 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644A-AU
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-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA644A-AU
Manufacturer:
Atmel
Quantity:
135
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28.8.11
8272A–AVR–01/10
Internal Oscillator Speed
Figure 28-381.ATmega1284P: Watchdog Oscillator Frequency vs. Temperature
Figure 28-382.ATmega1284P: Watchdog Oscillator Frequency vs. V
164A/164PA/324A/324PA/644A/644PA/1284/1284P
123
122
121
120
119
118
117
116
115
114
113
124
122
120
118
116
114
-40
2
-30
2.5
-20
-10
3
0
10
3.5
Temperature (°C)
20
V
CC
(V)
30
4
40
50
4.5
60
CC
70
5
80
5.5
90
-40 °C
2.7 V
3.3 V
4.0 V
5.5 V
25 °C
85 °C
544
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