ATMEGA644A-AU Atmel, ATMEGA644A-AU Datasheet - Page 408
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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28.3.9
8272A–AVR–01/10
Pin Threshold and Hysteresis
Figure 28-123.ATmega324A: I/O Pin Input Threshold vs. V
Figure 28-124.ATmega324A: I/O Pin Input Threshold vs. V
164A/164PA/324A/324PA/644A/644PA/1284/1284P
2.5
1.5
0.5
2.5
1.5
0.5
2
1
0
3
2
1
0
1.5
1.5
2
2
2.5
2.5
3
3
V
V
CC
CC
3.5
3.5
(V)
(V)
4
4
CC
CC
(V
(V
4.5
4.5
IH
IL
, I/O Pin Read as ‘0’).
, I/O Pin Read as ‘1’).
5
5
5.5
5.5
-40 °C
-40 °C
85 °C
25 °C
85 °C
25 °C
408
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