ATMEGA645A-AU Atmel, ATMEGA645A-AU Datasheet - Page 390

• Manufacturer Part Number: ATMEGA645A-AU
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA645A-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 54
• 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: 64-TQFP
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

390
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/645
Figure 29-111.ATmega165PA: Calibrated 8MHz RC Oscillator Frequency vs. Temperature
Figure 29-112.ATmega165PA: Calibrated 8MHz RC Oscillator Frequency vs. V
8.2
8.1
7.9
7.8
7.7
7.6
7.5
8.2
8.1
7.9
7.8
7.7
7.6
7.5
8
8
-50
1.5
2
-30
2.5
-10
3
Temperature (°C)
10
V
CC
3.5
(V)
30
4
50
4.5
70
5
CC
5.5
90
8285B–AVR–03/11
-45 °C
5.5 V
4.5 V
3.3 V
1.8 V
85 °C
25 °C