Datasheets

ATmega644

ATmega644 Complete
( file size: 6.1MB , 376 pages , revision O , updated: 03/2012 )

ATmega644

ATmega644 Summary
( file size: 705KB , 23 pages , revision O , updated: 03/2012 )

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The high-performance, low-power Atmel 8-bit AVR RISC-based microcontroller combines 64KB ISP flash memory with read-while-write capabilities, 2KB EEPROM, 4KB SRAM, 32 general purpose I/O lines, 32 general purpose working registers, real time counter, three flexible timer/counters with compare modes and PWM, 2 USARTs, byte oriented 2-wire serial interface, 8-channel/10-bit A/D converter with optional differential input stage with programmable gain, programmable watchdog timer with internal oscillator, SPI serial port, JTAG (IEEE 1149.1 compliant) test interface for on-chip debugging, and six software selectable power saving modes. The device operates between 2.7-5.5 volts.

By executing powerful instructions in a single clock-cycle, the device achieves throughputs approaching 1 MIPS per MHz, balancing power comsumption and processing speed.

Key Parameters

Parameter
Value

Flash (Kbytes):

64 Kbytes

Pin Count:

44

Max. Operating Freq. (MHz):

20 MHz

CPU:

8-bit AVR

# of Touch Channels:

16

Hardware QTouch Acquisition:

No

Max I/O Pins:

32

Ext Interrupts:

32

USB Speed:

No

USB Interface:

No

 

Ordering Codes

Ordering Code Package Speed Power Supply Operational Range Comment Buy Online Samples
ATMEGA644-20PU PDIP 40P6 40 20 2.7-5.5 Industrial (A) (-40°C to 85°C) Buy Request
ATMEGA644-20AUR TQFP 44A 44 20 2.7-5.5 Industrial (A) (-40°C to 85°C) Buy Request
ATMEGA644V-10MU MLF (VQFN) 44M1 44 10 1.8-5.5 Industrial (A) (-40°C to 85°C) Buy Request
ATMEGA644V-10AU TQFP 44A 44 10 1.8-5.5 Industrial (A) (-40°C to 85°C) Buy Request
ATMEGA644V-10MUR MLF (VQFN) 44M1 44 10 1.8-5.5 Industrial (A) (-40°C to 85°C) Buy Request
ATMEGA644-20MU MLF (VQFN) 44M1 44 20 2.7-5.5 Industrial (A) (-40°C to 85°C) Buy Request
ATMEGA644-20AU TQFP 44A 44 20 2.7-5.5 Industrial (A) (-40°C to 85°C) Buy Request
ATMEGA644V-10AUR TQFP 44A 44 10 1.8-5.5 Industrial (A) (-40°C to 85°C) Buy Request
ATMEGA644-20MUR MLF (VQFN) 44M1 44 20 2.7-5.5 Industrial (A) (-40°C to 85°C) Buy Request
ATMEGA644V-10PU PDIP 40P6 40 10 1.8-5.5 Industrial (A) (-40°C to 85°C) Buy