Factory Lead Time  

7 Weeks

Package / Case  

44-VFQFN Exposed Pad

Mounting Type  

Surface Mount

Mount  

Surface Mount

Contact Plating  

Tin

Number of Pins  

44

Watchdog Timers  

Yes

Number of I/Os  

32

Data Converters  

A/D 8x10b

Operating Temperature  

-40°C~85°C TA

Packaging  

Tray

Series  

AVR® ATmega

Published  

1997

JESD-609 Code  

e3

Pbfree Code  

yes

Part Status  

Active

Moisture Sensitivity Level (MSL)  

3 (168 Hours)

Number of Terminations  

44

Additional Feature  

ALSO OPERATES AT 2.7V SUPPLY AT 10 MHZ

Voltage - Supply  

5V

Terminal Position  

QUAD

Peak Reflow Temperature (Cel)  

260

Terminal Pitch  

0.5mm

Frequency  

20MHz

Time@Peak Reflow Temperature-Max (s)  

40

Base Part Number  

ATMEGA644

Interface  

2-Wire, I2C, SPI, UART, USART

Memory Size  

64kB

Oscillator Type  

Internal

RAM Size  

4K x 8

uPs/uCs/Peripheral ICs Type  

MICROCONTROLLER, RISC

Core Processor  

AVR

Peripherals  

Brown-out Detect/Reset, POR, PWM, WDT

Program Memory Type  

FLASH

Core Size  

8-Bit

Program Memory Size  

64KB 32K x 16

Connectivity  

I2C, SPI, UART/USART

Bit Size  

8

Access Time  

20 μs

Has ADC  

YES

DMA Channels  

NO

Data Bus Width  

8b

PWM Channels  

YES

DAC Channels  

NO

Number of Timers/Counters  

3

EEPROM Size  

2K x 8

Voltage - Supply (Max)  

5.5V

Voltage - Supply (Min)  

4.5V

Height Seated (Max)  

1mm

Length  

7mm

REACH SVHC  

No SVHC

Radiation Hardening  

No

RoHS Status  

ROHS3 Compliant

Lead Free  

Lead Free