Model No: ATMEGA644P-20MUR
Microchip Technology ATMEGA644P-20MUR
Manufacturer: Microchip Technology
SEMICON NO.: ATMEGA644P-20MUR
Package: 44-VQFN
Stock: In stock
Description: AVR ATmega MCU 8-Bit 20MHz 64KB FLASH
SEMICON NO.: ATMEGA644P-20MUR
Package: 44-VQFN
Stock: In stock
Description: AVR ATmega MCU 8-Bit 20MHz 64KB FLASH
Quantity :
| Mfr | Microchip Technology |
| Device Type | 8-bit Microcontroller (MCU) |
| Core Processor | AVR |
| Core Size | 8-Bit |
| Maximum CPU Speed | 20 MHz |
| Program Memory (Flash) | 64 KB (32K x 16) |
| SRAM | 4 KB (4K x 8) |
| EEPROM | 2 KB (2K x 8) |
| Analog-to-Digital Converter | 8-channel, 10-bit ADC |
| ADC Channels | 8 |
| General-Purpose I/O Pins | 32 |
| Communication Interfaces | I²C, SPI, UART/USART |
| Timers/Counters | 2x 8-bit, 1x 16-bit |
| PWM Channels | 6 |
| Operating Voltage | 2.7 V to 5.5 V |
| Operating Temperature | -40°C to +85°C |
| Package | 44-VQFN |
| Mounting Type | Surface Mount |
| Compliance | RoHS Compliant |
The ATMEGA644P‑20MUR is an 8‑bit high‑performance low‑power AVR RISC microcontroller from Microchip, delivered in 44‑pin VQFN surface‑mount tape‑and‑reel package, running maximum 20 MHz clock frequency, equipped with 64 KB in‑system self‑programmable flash, 2 KB EEPROM and 4 KB SRAM, supporting multiple serial interfaces, 8‑channel 10‑bit ADC and capacitive touch function, operating from 2.7 V to 5.5 V across‑40 °C to +85 °C for general embedded and battery‑powered devices.
Key Features
● Advanced AVR RISC core with 131 instructions, most executing within single clock cycle, delivering up to 20 MIPS processing capacity at 20 MHz working clock.
● High‑endurance non‑volatile memory including 64 KB ISP flash, 2 KB EEPROM and 4 KB SRAM, supporting read‑while‑write and in‑system programming for firmware upgrade.
● Rich peripherals containing dual USART, SPI, TWI(I2C), 8‑channel 10‑bit ADC with differential gain option, multi‑mode timers, 6‑channel PWM, JTAG debug interface and QTouch capacitive touch support.
● Six configurable low‑power sleep modes, power‑on reset, brown‑out detection and watchdog timer to optimize power consumption for battery‑operated hardware.
● 32 programmable GPIO lines, compact VQFN‑44 package, wide industrial temperature range and RoHS compliance for space‑constrained PCB layouts.
This AVR microcontroller is widely implemented for sensor acquisition modules, battery‑powered IoT nodes, home automation controllers, industrial low‑speed control units, capacitive touch human‑machine interfaces, consumer electronic control boards and small‑size embedded systems that require balanced performance, power consumption and cost budget.
FAQ
Q: What are critical design considerations for ATMEGA644P‑20MUR?
A: Match operating voltage with clock speed, configure fuse bits carefully for clock source and bootloader, add proper decoupling capacitors nearby power pins, and verify sleep‑mode settings to achieve expected low‑power performance.
Alternative embedded MCU Models
● ATMEGA644‑20MUR: Pin‑compatible AVR MCU without picoPower low‑power enhancement, suitable for cost‑sensitive projects where ultra‑low sleep current is not required.
● ATMEGA1284P‑AU: 40‑pin through‑hole AVR microcontroller with expanded 128 KB flash memory for projects needing larger program storage capacity.
● ATMEGA324P‑20MUR: VQFN‑44 footprint‑compatible MCU with reduced 32 KB flash, ideal for downgrade replacement when code size requirement is moderate.
Key Features
● Advanced AVR RISC core with 131 instructions, most executing within single clock cycle, delivering up to 20 MIPS processing capacity at 20 MHz working clock.
● High‑endurance non‑volatile memory including 64 KB ISP flash, 2 KB EEPROM and 4 KB SRAM, supporting read‑while‑write and in‑system programming for firmware upgrade.
● Rich peripherals containing dual USART, SPI, TWI(I2C), 8‑channel 10‑bit ADC with differential gain option, multi‑mode timers, 6‑channel PWM, JTAG debug interface and QTouch capacitive touch support.
● Six configurable low‑power sleep modes, power‑on reset, brown‑out detection and watchdog timer to optimize power consumption for battery‑operated hardware.
● 32 programmable GPIO lines, compact VQFN‑44 package, wide industrial temperature range and RoHS compliance for space‑constrained PCB layouts.
This AVR microcontroller is widely implemented for sensor acquisition modules, battery‑powered IoT nodes, home automation controllers, industrial low‑speed control units, capacitive touch human‑machine interfaces, consumer electronic control boards and small‑size embedded systems that require balanced performance, power consumption and cost budget.
FAQ
Q: What are critical design considerations for ATMEGA644P‑20MUR?
A: Match operating voltage with clock speed, configure fuse bits carefully for clock source and bootloader, add proper decoupling capacitors nearby power pins, and verify sleep‑mode settings to achieve expected low‑power performance.
Alternative embedded MCU Models
● ATMEGA644‑20MUR: Pin‑compatible AVR MCU without picoPower low‑power enhancement, suitable for cost‑sensitive projects where ultra‑low sleep current is not required.
● ATMEGA1284P‑AU: 40‑pin through‑hole AVR microcontroller with expanded 128 KB flash memory for projects needing larger program storage capacity.
● ATMEGA324P‑20MUR: VQFN‑44 footprint‑compatible MCU with reduced 32 KB flash, ideal for downgrade replacement when code size requirement is moderate.
