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ATMEGA644-20PU

ATMEGA644-20PU

ATMEGA644-20PU

Microchip Technology

64KB 32K x 16 FLASH AVR 8-Bit Microcontroller AVR® ATmega Series ATMEGA644 40 Pin 20MHz 5V 40-DIP (0.600, 15.24mm)

SOT-23

ATMEGA644-20PU Datasheet PDF

non-compliant

Technical Specifications

Parameter NameValue
TypeParameter
Factory Lead Time 12 Weeks
Lifecycle Status Production (Last Updated: 2 years ago)
Contact PlatingTin
Mount Through Hole
Mounting Type Through Hole
Package / Case 40-DIP (0.600, 15.24mm)
Surface MountNO
Number of Pins 40
Supplier Device Package 40-PDIP
Number of Terminals 40
Mounting Style Through Hole
Interfaces SPI/USART
Data Converters A/D 8x10b
Family Name ATmega
Instruction Set Architecture RISC
Dimensions 52.57 x 13.97 x 4.44mm
Typical Operating Supply Voltage 2.7 → 5.5 V
Package Type PDIP
Maximum Operating Temperature+85 °C
Minimum Operating Temperature -40 °C
MSL -
Qualification -
DAC Resolution -
Number of I/Os 32 I/O
Interface Type I2C, SPI, USART
Manufacturer Microchip
Brand Microchip Technology / Atmel
Tradename AVR
RoHS Details
Schedule B 8542310000
Package Tube
Base Product Number ATMEGA644
Mfr Microchip Technology
Product Status Active
Package Shape RECTANGULAR
Number of I/O Lines 32
Operating Temperature-40°C~85°C TA
PackagingTube
Series AVR® ATmega
Published 1997
JESD-609 Code e3
Pbfree Code yes
Part StatusActive
Moisture Sensitivity Level (MSL) Not Applicable
Number of Terminations 40
Terminal Finish Matte Tin (Sn)
Max Operating Temperature85 °C
Min Operating Temperature -40 °C
Additional FeatureALSO OPERATES AT 2.7V SUPPLY AT 10 MHZ
Terminal Position DUAL
Terminal FormTHROUGH-HOLE
Peak Reflow Temperature (Cel) NOT APPLICABLE
Supply Voltage 5V
Terminal Pitch2.54mm
Reach Compliance Code compliant
Frequency 20MHz
Base Part Number ATMEGA644
Pin Count40
JESD-30 Code R-PDIP-T40
Qualification StatusNot Qualified
Supply Voltage-Max (Vsup) 5.5V
Power Supplies3/5 V
Temperature GradeINDUSTRIAL
Supply Voltage-Min (Vsup) 4.5V
Interface 2-Wire, I2C, SPI, UART, USART
Max Supply Voltage5.5 V
Min Supply Voltage2.7 V
Memory Size64kB
Oscillator TypeInternal
Number of I/O 32
Speed 20MHz
RAM Size 4K x 8
Memory TypeFLASH
Voltage - Supply (Vcc/Vdd) 2.7V~5.5V
uPs/uCs/Peripheral ICs Type MICROCONTROLLER, RISC
Core Processor AVR
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Program Memory TypeFLASH
Core Size 8-Bit
Program Memory Size 64KB 32K x 16
Connectivity I2C, SPI, UART/USART
Supply Current-Max 9 mA
Bit Size 8
Data Converter A/D 8x10b
Watchdog TimerYes
Access Time 20 μs
Has ADC YES
DMA Channels NO
Data Bus Width 8b
PWM Channels YES
DAC Channels NO
Seated Height-Max 4.826 mm
Number of Timers/Counters 3
Product Type8-bit Microcontrollers - MCU
ROM (words) 32768
Core Architecture AVR
EEPROM Size 2K x 8
CPU Family AVR RISC
Max Frequency 20 MHz
Number of Programmable I/O 32
RAM (bytes) 4096
Number of ADC Channels 8
ROM Programmability FLASH
Number of PWM Channels 6
Number of I2C Channels 1
Number of SPI Channels 1
Product MCU
Product Category8-bit Microcontrollers - MCU
Device CoreAVR
Height 4.826mm
Length 52.58mm
Width 13.97mm
REACH SVHC No SVHC
Radiation HardeningNo
RoHS StatusROHS3 Compliant
Lead Free Lead Free
In-Stock:896 items

Pricing & Ordering

QuantityUnit PriceExt. Price
1$5.42000$5.42
25$4.96480$124.12
100$4.49080$449.08

ATMEGA644-20PU Product Details

ATMEGA644-20PU Overview


The package is 40-DIP (0.600, 15.24mm)-shaped. There are 32 I/Os. In the case of the IC chip, the type of mounting is Through Hole. Microcontroller is based on the 8-Bit core architecture. The type of program memory it uses is FLASH. Temperatures in the range of -40°C~85°C TA are operated by this Microcontroller. It is part of the AVR® ATmega series of electrical components. Having a size of 64KB 32K x 16, Microcontroller has a program memory of X bytes. A AVR Core Processor is at the core of this Microcontroller. This device belongs to the MICROCONTROLLER, RISC uPs/uCs/Peripheral ICs category. IC Chip 40 has 40 terminations. 8-bits are used for its size. IC Chip has 5V volt supply outputs. With NO DMA channels, Microcontroller chip can handle large data transfers. 64kB is the size of the memory in the IC part. Using the base part number ATMEGA644, you will be able to find alternatives for the part. Using a 20MHz frequency, this electronic part can perform efficiently. Devices work in YES PWM channels. On the chip, 40 pins are accessible. In total, there are 3 timers/counters on the device. The pin count is 40. There is an embedded the AVR RISC CPU family inside the device, which makes it a powerful device. There is FLASH memory on this piece of equipment. In addition, it comes with a AVR core architecture. It has 32 Programmable Input/Output pins that can be programmed. In addition to the above, there are other features such as ALSO OPERATES AT 2.7V SUPPLY AT 10 MHZ, to name but a few. The ADC channel count on this device totals up to 8 channels. In order for the device to function, it uses 6 PWM channels. 1 I2C channels are integrated by the part.

ATMEGA644-20PU Features


40-DIP (0.600, 15.24mm) package
Mounting type of Through Hole
Minimum temperature of -40 °C


ATMEGA644-20PU Applications


There are a lot of Microchip Technology
ATMEGA644-20PU Microcontroller applications.


  • Instrument control
  • Toys
  • Robots
  • Radio
  • Television
  • Heater/Fan
  • Calculator
  • Kindle
  • Christmas lights
  • 3D printers

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