ATMEGA644P-20AQR vs ATMEGA644PA-AU Comparison

Detailed side-by-side comparison of ATMEGA644P-20AQR by Microchip Technology and ATMEGA644PA-AU by Microchip Technology. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.

Microchip Technology
ATMEGA644P-20AQR ATMEGA644P-20AQR - 8-bit AVR MCU 64KB 20MHz TQFP-44 | Microchip

ATMEGA644P-20AQR - 8-bit AVR MCU 64KB 20MHz TQFP-44 | Microchip

ATMEGA644P-20AQR βœ“ Active
Microchip Technology
ATMEGA644PA-AU ATMEGA644PA-AU - 8-bit AVR MCU, 20MHz, 64KB Flash | Microchip

ATMEGA644PA-AU - 8-bit AVR MCU, 20MHz, 64KB Flash | Microchip

ATMEGA644PA-AU βœ“ Active

Specification Comparison

Parameter ATMEGA644P-20AQR ATMEGA644PA-AU
Brand Microchip Technology Microchip Technology
Category Microcontrollers Microcontrollers
Lifecycle Status Active Active
Stock Status In Stock In Stock
Unit Price (USD) $5.95 $2.49
Core Architecture AVR 8-bit RISC 8-bit AVR RISC
Core Size 8-Bit β€”
Maximum Clock Frequency 20 MHz 20 MHz
Program Memory Size 64 KB (32K x 16) Flash β€”
Program Memory Type In-System Programmable Flash β€”
RAM Size 4 KB (4K x 8) SRAM β€”
EEPROM Size 2 KB β€”
Number of I/O 32 β€”
Package / Case 44-TQFP (10 x 10 mm) β€”
Mounting Type Surface Mount Surface Mount
Oscillator Type Internal β€”
Peripherals Dual USART, 10-bit ADC, JTAG, picoPower features β€”
Instructions 131 powerful instructions, most single-clock cycle β€”
Supply Voltage 5 V (industrial per Mouser listing); [DATA_NEEDED: exact VCC min/max range] 2.5 V / 3.3 V / 5 V
Operating Temperature [DATA_NEEDED: temperature range - Mouser lists IND (industrial)] [DATA_NEEDED: Operating Temperature Range]
Packaging Tape & Reel (TR) β€”
Programming Interface ICSP (SPI) and JTAG β€”
RoHS Status [DATA_NEEDED: RoHS compliance status] Compliant (RoHS Y per PartGenie)
Flash Memory β€” 64 KB (32K x 16), ISP, read-while-write
SRAM β€” 4 KB
EEPROM β€” 2 KB
General Purpose I/O β€” 32 lines
Working Registers β€” 32 general purpose registers
Timers/Counters β€” 3 flexible timer/counters with compare modes and PWM
USART Interfaces β€” 2
Serial Interfaces β€” TWI (I2C-compatible, byte-oriented), SPI
ADC β€” 8-channel, 10-bit
Real-Time Counter β€” Yes
Low Power Technology β€” picoPower
Package β€” 44-TQFP (10x10 mm)
MSL Rating β€” [DATA_NEEDED: Moisture Sensitivity Level]
Debug/Programming β€” ICSP via 2 I/O pins + reset; debug with MPLAB SNAP

Datasheets & Resources

Browse All Products Create BOM Request Quote