ATMEGA644P-20PU
- Mfr.Part #
- ATMEGA644P-20PU
- Manufacturer
- Microchip Technology
- Package / Case
- 40-DIP (0.600, 15.24mm)
- Datasheet
- Download
- Description
- IC MCU 8BIT 64KB FLASH 40DIP
- Stock
- 25
- In Stock :
- 25
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- Manufacturer :
- Microchip Technology
- Product Category :
- Microcontrollers
- DAC Channels :
- No
- Published :
- 1997
- Pbfree Code :
- yes
- Length :
- 52.58mm
- uPs/uCs/Peripheral ICs Type :
- MICROCONTROLLER, RISC
- Device Core Size :
- 8(b)
- Oscillator Type :
- Internal
- Temperature Grade :
- Industrial
- Peripherals :
- Brown-out Detect/Reset, POR, PWM, WDT
- REACH SVHC :
- No SVHC
- Width :
- 13.97mm
- Supply Voltage-Max (Vsup) :
- 5.5V
- Height :
- 4.826mm
- PWM Channels :
- yes
- Qualification Status :
- Not Qualified
- Package Shape :
- RECTANGULAR
- Tradename :
- AVR
- Dimensions :
- 52.57 x 13.97 x 4.44mm
- Operating Temperature (Min) :
- -40C
- Radiation Hardening :
- No
- Interfaces :
- I2C, SPI, UART
- Operating Temp Range :
- -40C to 85C
- Number of PWM Channels :
- 6
- ROM (words) :
- 32768
- Interface :
- 2-Wire, I2C, SPI, UART, USART
- Number of Terminals :
- 40
- Rad Hardened :
- No
- Supply Voltage :
- 5V
- Supplier Device Package :
- 40-PDIP
- Terminal Form :
- THROUGH-HOLE
- Product :
- MCU
- Clock Freq :
- 20(MHz)
- Operating Supply Voltage (Min) :
- 2.7(V)
- Mount :
- Through Hole
- Manufacturer :
- Microchip
- Program Memory Type :
- Flash
- Factory Lead Time :
- 4 Weeks
- RoHS Status :
- ROHS3 Compliant
- ROM Programmability :
- Flash
- Program Memory Size :
- 64KB 32K x 16
- Package :
- Tube
- Additional Feature :
- IT ALSO OPERATES AT 10 MHZ WITH THE 2.7 V
- Total Internal Ram Size :
- 4KB(kB)
- Number of Timers/Counters :
- 3
- Mounting Style :
- Through Hole
- RAM (bytes) :
- 4096
- Number of ADC Channels :
- 8
- Operating Temperature :
- -40°C~85°C TA
- Base Product Number :
- ATMEGA644
- Number of I/O Lines :
- 32
- Packaging :
- Tube
- Power Supplies :
- 3/5 V
- Seated Height-Max :
- 4.826 mm
- Watchdog Timer :
- yes
- Speed :
- 20MHz
- Contact Plating :
- Tin
- MSL :
- -
- Number of I2C Channels :
- 1
- Mounting :
- Through Hole
- Minimum Operating Temperature :
- -40 °C
- Terminal Position :
- Dual
- Product Status :
- Active
- Maximum Operating Temperature :
- +85 °C
- Data Converters :
- A/D 8x10b
- Instruction Set Architecture :
- RISC
- Package / Case :
- 40-DIP (0.600, 15.24mm)
- Lead Free :
- Lead Free
- JESD-30 Code :
- R-PDIP-T40
- EEPROM Size :
- 2K x 8
- Family Name :
- ATMEGA
- Device Core :
- AVR
- Operating Supply Voltage (Typ) :
- 3.3/5(V)
- RAM Size :
- 4K x 8
- Operating Temperature Classification :
- Industrial
- Product Category :
- 8-bit Microcontrollers - MCU
- Product Type :
- 8-bit Microcontrollers - MCU
- Package Type :
- PDIP W
- Qualification :
- -
- Mounting Type :
- Through Hole
- Address Bus Width :
- 8B
- Number of Terminations :
- 40
- JESD-609 Code :
- e3
- CPU Family :
- AVR RISC
- RoHS :
- Details
- Core Size :
- 8-Bit
- Voltage - Supply (Vcc/Vdd) :
- 2.7V~5.5V
- Supply Voltage-Min (Vsup) :
- 4.5V
- Core Processor :
- AVR
- Number of I/O :
- 32
- Surface Mount :
- No
- Bit Size :
- 8
- Brand :
- Microchip Technology / Atmel
- Frequency :
- 20MHz
- Connectivity :
- I2C, SPI, UART/USART
- Peak Reflow Temperature (Cel) :
- Not Applicable
- Terminal Finish :
- Matte Tin (Sn)
- Terminal Pitch :
- 2.54mm
- Data Bus Width :
- 8B
- DMA Channels :
- No
- Number of I/Os :
- 32 I/O
- Has ADC :
- yes
- Moisture Sensitivity Level (MSL) :
- Not Applicable
- Programmable :
- yes
- Base Part Number :
- ATMEGA644P
- Supply Current-Max :
- 9 mA
- # I/Os (Max) :
- 32
- Number of Pins :
- 40
- Reach Compliance Code :
- Compliant
- Memory Size :
- 64KB
- Typical Operating Supply Voltage :
- 2.7 → 5.5 V
- Series :
- AVR® ATmega
- Operating Temperature (Max) :
- 85C
- Interface Type :
- SPI/USART
- Data Converter :
- A/D 8x10b
- Pin Count :
- 40
- Access Time :
- 20 μs
- Operating Supply Voltage (Max) :
- 5.5(V)
- Number of Timers - General Purpose :
- 3
- Datasheets
- ATMEGA644P-20PU
ATMEGA644P-20PU Documents

Microcontrollers Microchip Technology ATMEGA644P-20PU Overview
The ATMEGA644P-20PU from Microchip Technology is a robust microcontroller unit (MCU) designed for sophisticated applications that require a combination of low power consumption and high performance in a compact form factor. As a vital component in the Microcontrollers category, this device operates with an advanced 8-bit AVR RISC-based architecture, offering substantial program memory of 64KB Flash. The ATMEGA644P-20PU is tailored to meet the demanding requirements of advanced embedded systems, making it an excellent choice for designers looking to enhance operational efficiency and reliability.
ATMEGA644P-20PU Features
The ATMEGA644P-20PU features a variety of technical specifications that make it a versatile choice for numerous applications. Key features include 64KB of in-system programmable flash, 2KB SRAM, and 2KB EEPROM, which provide ample storage for both application code and data. It supports a wide operating voltage range of 1.8V to 5.5V, ensuring flexibility across different power setups and enhancing its utility in battery-operated applications. The device also offers multiple communication options, including USART, SPI, and TWI, along with a 10-bit ADC with 8 channels, providing excellent interfacing capabilities with various peripherals and sensors.
ATMEGA644P-20PU Applications
- Industrial Control Systems: Utilizes its robust I/O capabilities to manage automation processes, enhancing the efficiency and reliability of manufacturing operations.
- Smart Home Devices: Employs its low power consumption and connectivity options to control and monitor home automation systems seamlessly.
- Automotive Applications: Leverages its advanced control features to enhance vehicle system management, including engine control and diagnostic systems.
- Consumer Electronics: Integrates into products such as handheld devices, offering efficient power management and user interface control.
- Healthcare Devices: Takes advantage of its precision analog features and connectivity to support medical monitoring equipment with high reliability and accuracy.
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