ATMEGA644A-PU Atmel, ATMEGA644A-PU Datasheet - Page 489
ATMEGA644A-PU
Manufacturer Part Number
ATMEGA644A-PU
Description
IC MCU AVR 64K FLASH 40PDIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644A-PU
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
40-DIP (0.600", 15.24mm)
Processor Series
ATmega
Core
AVR
Data Bus Width
8 bit
Data Ram Size
4 KB
Interface Type
JTAG, TWI, SPI, USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
Minimum Operating Temperature
- 40 C
Operating Temperature Range
- 40 C to + 85 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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28.6.10
8272A–AVR–01/10
BOD Threshold
Figure 28-276.ATmega644PA: BOD Threshold vs. Temperature (V
Figure 28-277.ATmega644PA: BOD Threshold vs. Temperature (V
164A/164PA/324A/324PA/644A/644PA/1284/1284P
2.77
2.75
2.73
2.71
2.69
2.67
2.65
4.35
4.32
4.29
4.26
4.23
4.2
-50
-50
-40
-40
-30
-30
-20
-20
-10
-10
0
0
10
Temperature (°C)
Falling Vcc
Temperature (°C)
10
Rising Vcc
20
20
Rising Vcc
Falling Vcc
30
30
40
40
50
50
60
60
70
BOT
BOT
= 4.3V)
70
= 2.7V)
80
90
80
100
90
489
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