Microcontroladores

Produtos (18688)

ATMEGA640-16AU - 8-bit AVR MCU 16MHz 64KB Flash | Microchip
ATMEGA640-16AU

ATMEGA640-16AU - 8-bit AVR MCU 16MHz 64KB Flash | Microchip

The Microchip Technology ATMEGA640-16AU is a high-performance, low-power 8-bit AVR RISC microcontroller with 64 KB ISP Flash, 4 KB EEPROM, and 8 KB SRAM, executing up to 16 MIPS at 16 MHz in a 100-pin TQFP (14x14 mm) surface-mount package. It exposes 86 general-purpose I/O lines, four USARTs, one SPI port, one TWI (I2C) interface, a 16-channel 10-bit ADC, and six timer/counters with PWM, and operates from 2.7 V to 5.5 V to support both 3.3 V and 5 V designs. An 8-bit AVR microcontroller is a member of the microcontroller unit (MCU) family that integrates a processor core, program memory, data memory, and peripherals on a single die. Within the embedded-system hierarchy, the MCU sits at the control layer, orchestrating sensors, actuators, and communication interfaces. The AVR enhanced RISC core executes most instructions in a single clock cycle, delivering approximately 1 MIPS per MHz of throughput, which is the throughput-per-megahertz benchmark used across the ATmega lineup. The 16 MHz speed grade therefore yields ~16 MIPS, while in-system programmable (ISP) Flash allows firmware updates without removing the device from the PCB. Key features include 86 general-purpose I/O lines, 32 general-purpose working registers, a real-time counter, six flexible timer/counters with compare modes and PWM, four USARTs, a byte-oriented 2-wire serial interface (I2C/TWI), an SPI interface, a 16-channel 10-bit ADC, and an on-chip JTAG interface for boundary-scan and on-chip debugging. The 16 MHz speed grade and 2.7 V to 5.5 V supply range cover both 3.3 V and 5 V rails, simplifying mixed-voltage designs. The AVR enhanced RISC architecture combines a rich instruction set with single-cycle execution, while ISP Flash enables in-system firmware updates. The generous 86-I/O count and 16 PWM channels suit multi-axis motor control, and the four USARTs enable multi-channel serial communication such as RS-485 networks or multi-drop sensor buses. Typical applications include industrial automation controllers, building automation, 3D printers and CNC controllers, Arduino Mega-class development platforms (via MegaCore support), and multi-sensor instrumentation. The wide TQFP-100 footprint provides ample I/O for gateways, and the JTAG debug port speeds firmware bring-up. Design consideration: ensure decoupling capacitors on all VCC/AVCC pins and account for the wide TQFP-100 footprint in PCB routing; the ADC reference and AVCC supply should be filtered separately from digital VCC to preserve ADC accuracy at 10 bits. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

USD $6,90 Em estoque
ATMEGA640-16AUR - 8-bit AVR MCU 64KB Flash 16MHz TQFP-100 | Microchip
ATMEGA640-16AUR

ATMEGA640-16AUR - 8-bit AVR MCU 64KB Flash 16MHz TQFP-100 | Microchip

The Microchip Technology ATMEGA640-16AUR is an 8-bit AVR RISC-based microcontroller integrating 64 KB of in-system programmable Flash, 8 KB SRAM, and 4 KB EEPROM, with a 16 MHz maximum CPU clock and 86 general-purpose I/O lines, supplied in a 100-pin TQFP (14x14 mm) surface-mount package and rated for 4.5 V to 5.5 V operation over the industrial temperature range. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, delivering close to 1 MIPS per MHz. The AVR ATmega family sits within the broader taxonomy of microcontroller units (MCUs) under the semiconductor and embedded-system hierarchy, and the ATmega640 shares its core with the ATmega1280/ATmega2560 used on the Arduino Mega platform, making it familiar to a wide embedded engineering audience. Key features include 32 general-purpose working registers, six flexible timer/counters with compare and PWM modes, a real-time counter with separate oscillator, and an 8/16-channel 10-bit successive-approximation ADC. The device also integrates two programmable serial USARTs, a master/slave SPI interface, a byte-oriented 2-wire serial interface (TWI/I2C-compatible), a programmable watchdog timer with its own on-chip oscillator, an on-chip analog comparator, and an output-compare modulator for dead-time generation. Technical depth: the AVR core achieves close to 1 MIPS per MHz throughput, allowing the ATMEGA640-16AUR to deliver approximately 16 MIPS at 16 MHz while keeping active power low. ISP Flash supports firmware updates on the final PCB without removing the device, the 4 KB EEPROM retains calibration and configuration data through power cycles, and the 100-pin TQFP package exposes enough I/O for parallel buses, multiple UART channels, and PWM-rich motor-control front-ends simultaneously. Typical applications include industrial control systems, building automation and HVAC controllers, consumer appliances, white goods, and instrumentation requiring many I/O lines and multiple serial channels. Its Arduino Mega compatibility also makes it popular for rapid prototyping and education. Design consideration: the suffix decoding matters - 16A = 16 MHz / 4.5-5.5 V, U = industrial temperature (-40C to +85C), R = tape-and-reel. For 2.7-5.5 V or 8 MHz battery designs, choose ATmega640V-8AUR instead. Ensure ISP programming signals (MOSI, MISO, SCK, RESET) are brought out to a programming header. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-10-07.

USD $6,20 Em estoque
ATMEGA640-16CU - 8-bit AVR MCU 16MHz 64KB CBGA-100 | Microchip
ATMEGA640-16CU

ATMEGA640-16CU - 8-bit AVR MCU 16MHz 64KB CBGA-100 | Microchip

The Microchip Technology ATMEGA640-16CU (originally Atmel) is an 8-bit AVR RISC microcontroller with 64KB of in-system programmable FLASH, 8KB SRAM, 4KB EEPROM, and a 16MHz maximum clock, housed in a 100-ball CBGA package measuring 9x9 mm. An 8-bit microcontroller is an integrated circuit that executes instructions and controls peripheral devices using an 8-bit-wide data bus. The AVR ATmega family belongs to the broader taxonomy of embedded processors under the microcontroller (MCU) category, sitting alongside Microchip's PIC and SAM product lines. MCUs integrate CPU, memory, and peripherals on a single die, making them the foundation of embedded system design. Key features of the ATMEGA640-16CU include a 16MHz AVR RISC core delivering up to 16 MIPS, 64KB self-programmable FLASH with a dedicated boot section supporting in-system programming, and rich connectivity: four USARTs, one master/slave SPI interface, and one byte-oriented 2-wire serial interface (TWI/I2C). The device also integrates a programmable watchdog timer with a separate on-chip oscillator and an on-chip analog comparator. Technical depth: the AVR architecture uses a Harvard structure with single-cycle instruction execution, and the ATmega640 shares its die family with the ATmega1280 and ATmega2560 (64K/128K/256K Bytes In-System Programmable Flash per the datasheet title). Peripherals include an 8/16-channel 10-bit ADC and an output compare modulator. Typical applications include industrial automation controllers, 3D printer mainboards, embedded networking nodes, and test and measurement equipment, where the many USARTs and I/O ports simplify multi-channel designs. Design consideration: this part runs from a 4.5V to 5.5V supply only, so 3.3V designs require the V variants or level shifting; verify CBGA assembly capability before layout. This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

USD $8,61 Em estoque
ATMEGA640-16CUR - 8-Bit AVR MCU 64KB 16MHz 100-CBGA | Microchip
ATMEGA640-16CUR

ATMEGA640-16CUR - 8-Bit AVR MCU 64KB 16MHz 100-CBGA | Microchip

The Microchip ATMEGA640-16CUR is an 8-bit AVR RISC microcontroller with 64 KB ISP Flash memory, 8 KB SRAM, and 4 KB EEPROM, executing at up to 16 MHz from a 2.7V to 5.5V supply in a 100-ball CBGA (9x9 mm) package. An 8-bit AVR microcontroller is a reduced-instruction-set (RISC) single-chip computer that integrates program Flash, data SRAM, EEPROM, timers, serial interfaces, and an ADC on one die. Within the power-management-and-control hierarchy of embedded systems, the AVR ATmega family sits in the general-purpose microcontroller class, alongside families such as PIC and STM8, and is programmed through In-System Programming (ISP) and debugged via In-Circuit Serial Programming (ICSP). Key features include 86 general-purpose I/O lines, up to four programmable serial USARTs, a master/slave SPI interface, a byte-oriented 2-wire serial interface (TWI/I2C-compatible), an 8/16-channel 10-bit ADC, an output-compare modulator, a programmable watchdog timer with a separate on-chip oscillator, and an on-chip analog comparator. The AVR core uses a Harvard architecture with 32 general-purpose working registers directly connected to the ALU, allowing most instructions to execute in a single clock cycle. The -16 speed grade sustains full 16 MIPS throughput at 16 MHz (5V), while the wide 2.7V to 5.5V operating range supports both battery-powered 3.3V designs and industrial 5V systems. The 64 KB self-programmable Flash enables boot-loader-based field firmware updates, and 4 KB EEPROM retains calibration data through power cycles. Typical applications include industrial automation controllers, building automation and HVAC boards, test and measurement instrumentation, and legacy ATmega2560-style embedded designs that need a lower-cost 64 KB memory point. Design consideration: at 16 MHz the device is specified for 4.5V to 5.5V operation; below 4.5V the maximum safe clock frequency decreases, so derate f_MAX versus VCC per the manufacturer datasheet. This page synthesizes distributor pricing, drop-in alternatives within the same 100-ball CBGA footprint, and practical design notes not found in the manufacturer datasheet.

USD $6,72 Em estoque
ATMEGA640V-8AU - 8MHz 64KB Flash AVR MCU 100-TQFP | Microchip
ATMEGA640V-8AU

ATMEGA640V-8AU - 8MHz 64KB Flash AVR MCU 100-TQFP | Microchip

The Microchip Technology ATMEGA640V-8AU is an 8-bit AVR RISC microcontroller with 64KB ISP Flash memory, 8KB SRAM, and 4KB EEPROM, operating at up to 8MHz across a 1.8V to 5.5V supply range, housed in a 100-pin TQFP (14x14 mm) package. This V-variant of the ATmega640 family targets low-voltage, battery-powered designs. An 8-bit AVR microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, timers, serial interfaces, and analog peripherals on one die. Microcontrollers sit at the device level of the embedded-systems hierarchy, beneath single-board computers and above discrete logic, and are the central building block of industrial control, consumer, and IoT electronics. Key features include 86 general purpose I/O lines, four USARTs, a byte-oriented 2-wire (I2C-compatible) serial interface, a master/slave SPI interface, a 16-channel 10-bit ADC, an on-chip analog comparator, a programmable watchdog timer with separate on-chip oscillator, and six flexible timer/counters with compare modes and PWM capability. External memory interfacing (EBI/EMI) supports system expansion. The AVR architecture executes most instructions in a single clock cycle through a Harvard-architecture RISC pipeline with 32 general purpose working registers, delivering throughput approaching 1 MIPS per MHz. At 8MHz this yields roughly 8 MIPS, adequate for control loops, protocol bridging, and instrument firmware while consuming very little power. In-System Programmable (ISP) Flash allows firmware updates without removing the device, and the ATmega640 shares its die with the ATmega1280/2560 family, simplifying memory-size migrations. Typical applications include industrial automation and building control nodes, low-voltage battery-powered instrumentation, motor control and LED lighting systems, and communication bridges using multiple USARTs. The wide 1.8V to 5.5V supply range makes it well suited to 2xAA/3xAA battery products. Design consideration: the V-grade maximum clock frequency of 8MHz applies across the full voltage range; the 5V-only 16MHz ATMEGA640-16AU is the speed-upgrade path but requires at least 4.5V supply. This page synthesizes distributor pricing, drop-in family alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet.

USD $3,95 Em estoque
ATMEGA640V-8AUR - 8-bit AVR MCU 64KB Flash 8MHz TQFP-100 | Microchip
ATMEGA640V-8AUR

ATMEGA640V-8AUR - 8-bit AVR MCU 64KB Flash 8MHz TQFP-100 | Microchip

The Microchip Technology ATMEGA640V-8AUR is a high-performance, low-power 8-bit AVR RISC microcontroller with 64 KB of In-System Programmable (ISP) Flash memory, 8 KB SRAM, and 4 KB EEPROM, operating at up to 8 MHz with a 1.8 V to 5.5 V supply, housed in a 100-pin TQFP (14 x 14 mm) package supplied on tape and reel. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor in which Flash program memory, SRAM data memory, and EEPROM non-volatile storage are addressed on separate buses. Within the semiconductor hierarchy, the ATmega640 sits in the AVR ATmega family, under general-purpose microcontrollers, under embedded processors. In a complete system it acts as the central control element, reading sensors, driving actuators, and managing communication interfaces. Key features include 86 general-purpose I/O lines, 32 general-purpose working registers directly connected to the ALU for single-cycle execution, and six flexible timer/counters with output-compare and PWM channels. The device integrates an 8/16-channel 10-bit ADC, up to four programmable USARTs, master/slave SPI, a byte-oriented two-wire serial interface (TWI/I2C), a programmable watchdog timer with a separate on-chip oscillator, an on-chip analog comparator, and interrupt and wake-up on pin change. The AVR core achieves throughputs close to 1 MIPS per MHz, so at 8 MHz the ATMEGA640V-8AUR delivers roughly 8 MIPS while consuming very little power, which is why the V-grade (1.8 V to 5.5 V) part is favored in battery-powered and low-voltage industrial designs. In-System Programming via SPI and support for in-circuit debugging with tools such as MPLAB SNAP simplify manufacturing and field updates. Typical applications include industrial automation controllers, building automation and HVAC systems, battery-powered instrumentation, motor control panels, and multi-channel sensor acquisition nodes that need the 100-pin TQFP I/O count. Design-wise, remember the 8 MHz maximum clock for the V-grade part: do not substitute a faster grade at reduced voltage without checking the frequency-versus-voltage curve in the manufacturer datasheet. Decouple VCC and AVCC with 100 nF ceramics placed close to the pins. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-18.

USD $9,60 Em estoque
ATMEGA640V-8CU - 8MHz AVR 64KB Flash MCU 100-CBGA | Microchip
ATMEGA640V-8CU

ATMEGA640V-8CU - 8MHz AVR 64KB Flash MCU 100-CBGA | Microchip

The Microchip (Atmel) ATMEGA640V-8CU is a high-performance, low-power 8-bit AVR RISC microcontroller with 64KB of In-System Programmable Flash, 8KB SRAM, 4KB EEPROM, 86 general-purpose I/O lines, and a maximum clock frequency of 8MHz at the low-voltage operating range, housed in a 100-ball CBGA (9x9 mm) package. An 8-bit AVR microcontroller is a reduced-instruction-set computing device based on the Harvard architecture, executing most instructions in a single clock cycle. In the embedded-system hierarchy, it sits as the central processing element of a power management and control IC, integrating program memory, data memory, peripherals (timers, USARTs, SPI, TWI, ADC) and a CPU core on a single die, eliminating the need for external memory in most designs. Key features include the AVR RISC core with 32 general-purpose working registers, 64KB self-programmable Flash with 2KB boot section, four flexible 16-bit timer/counters with output-compare modulator, two 8-bit timers, an 8/16-channel 10-bit ADC, and up to four programmable serial USARTs plus master/slave SPI and byte-oriented 2-wire (TWI/I2C) interfaces. A programmable watchdog timer with a separate on-chip oscillator and on-chip analog comparator complete the peripheral set. The V-variant operates at the low end of the AVR voltage range, supporting green/lead-free assembly and industrial temperature ranges, making it suitable for battery-driven systems where supply voltage may fall well below the conventional 5V rail. The CBGA ball-grid array improves signal integrity and board density versus QFP alternatives for high-pin-count applications. Typical applications include industrial automation and control nodes, battery-powered instrumentation, building management systems, and multi-channel serial communication gateways that exploit the four USARTs and large 86-I/O complement. A key design consideration: verify the speed-versus-voltage curve, as the maximum safe clock frequency decreases at lower supply voltages, and ensure JTAG/debug pins are correctly strapped on the 100-ball footprint. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.

USD $8,36 Em estoque
ATMEGA640V-8CUR - 8MHz AVR 64KB MCU 100-CBGA | Microchip
ATMEGA640V-8CUR

ATMEGA640V-8CUR - 8MHz AVR 64KB MCU 100-CBGA | Microchip

The Microchip Technology ATMEGA640V-8CUR is an 8-bit AVR RISC microcontroller with 64 KB ISP Flash memory, 8 KB SRAM, and 4 KB EEPROM, rated for operation up to 8 MHz at 1.8 V to 5.5 V in a 100-ball CBGA (9x9 mm) package. An 8-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals on a single die, executing one instruction per clock cycle in the AVR RISC architecture. MCUs sit at the lowest level of the embedded system hierarchy - above discrete logic and below application processors - and are the workhorse of industrial control, instrumentation, and consumer electronics. The ATmega640 belongs to the megaAVR family, the large-pin-count branch of the AVR product line. Key features include 64 KB of self-programmable ISP Flash, 86 general purpose I/O lines, 32 general purpose working registers, a real-time counter, six flexible timer/counters, and in-circuit serial programming (ICSP) via just two device I/O pins plus reset. The V-suffix device supports the extended low-voltage operating range (1.8 V minimum), enabling battery-powered and low-voltage industrial designs. Architecturally, the AVR core executes most instructions in a single clock cycle through a Harvard-architecture pipeline with separate program and data buses, giving high code efficiency and deterministic timing. The device integrates JTAG-based on-chip debugging and supports the MPLAB Snap programmer through the 8-pin SIL ICSP connector. Typical applications include industrial automation controllers, building management nodes, instrumentation front ends, and battery-operated monitoring systems where the wide 1.8 V to 5.5 V supply range and low-power sleep modes are decisive. Design consideration: clock speed derates with supply voltage - 8 MHz is safe across the full 1.8 V to 5.5 V range, but verify the voltage-frequency curve if migrating to the 16 MHz ATMEGA640 variants. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-18.

USD $4,02 Em estoque
ATMEGA644-20AU - 8-Bit AVR MCU 64KB Flash 20MHz | Microchip
ATMEGA644-20AU

ATMEGA644-20AU - 8-Bit AVR MCU 64KB Flash 20MHz | Microchip

The Microchip Technology ATMEGA644-20AU is an 8-bit AVR RISC microcontroller with 64 KB in-system programmable Flash, 4 KB SRAM, 2 KB EEPROM, and 32 general-purpose I/O lines, operating at up to 20 MHz from a 2.7 V to 5.5 V supply in a 44-pin TQFP (10x10 mm) package. It delivers up to 20 MIPS throughput at 20 MHz, combining 131 powerful instructions with 32 general-purpose working registers for single-cycle execution. An AVR microcontroller is a Harvard-architecture 8-bit MCU family that executes most instructions in a single clock cycle using on-chip Flash program memory, SRAM data memory, and EEPROM non-volatile storage. Within the product taxonomy, the ATmega644 sits at AVR MCU -> 8-bit microcontroller -> embedded microcontroller -> integrated circuit, and it is the 64 KB Flash member of the ATmega164/324/644 pin-compatible family. Key features include 64 KB ISP Flash with read-while-write, 4 KB SRAM, 2 KB EEPROM, two USARTs, a byte-oriented two-wire serial interface, an 8-channel 10-bit ADC, three flexible timer/counters with compare and PWM modes, a programmable watchdog timer, and an internal calibrated RC oscillator. The JTAG interface supports IEEE 1149.1 boundary scan plus on-chip debug and programming. The device uses a low-power CMOS process with six sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby), enabling battery-powered designs to trade throughput for microamp-level current consumption. The 20 MHz speed grade (-20) supports 2.7 V to 5.5 V operation, while the 10 MHz and 16 MHz grades are restricted to lower supply ranges. Typical applications include industrial control panels, building automation nodes, motor control front-ends, battery chargers, handheld instruments, and legacy ATmega644 replacement in existing designs. The 32 I/O lines and dual USARTs make it well suited to multi-sensor data acquisition and serial gateway roles. When designing with this device, decouple every VCC pin with a 100 nF ceramic capacitor placed close to the pin, and keep the AREF pin bypassed with 100 nF plus a 10 uF bulk capacitor when using the ADC. Note that Microchip lists the ATmega644 as a mature product not recommended for new designs, with the ATmega644PA recommended as the successor. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for procurement and second-source decisions.

USD $4,96 Em estoque
ATMEGA644-20MUR - 8-bit AVR MCU 64KB Flash 20MHz | Microchip
ATMEGA644-20MUR

ATMEGA644-20MUR - 8-bit AVR MCU 64KB Flash 20MHz | Microchip

The Microchip Technology ATMEGA644-20MUR is an 8-bit AVR RISC microcontroller with 64KB of ISP flash memory, 4KB SRAM, 2KB EEPROM, and a 20 MHz maximum clock frequency, operating from a 4.5V to 5.5V supply in a 44-pin VQFN (7x7 mm) exposed-pad package with industrial temperature rating. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, sitting within the microcontroller hierarchy between simple 8-bit MCUs and 32-bit ARM parts. ATmega devices integrate program flash, data SRAM, EEPROM, timers, USART, SPI, TWI (I2C), and a 10-bit ADC on a single die, making them complete embedded control solutions for cost-sensitive designs. Key features include 64KB self-programmable flash with read-while-write support, 32 general-purpose I/O lines, three flexible timers/counters with compare modes and PWM, a 10-bit 8-channel ADC, and in-circuit serial programming (ICSP) compatible with the MPLAB SNAP and AVR ISP tools. The AVR core achieves close to 1 MIPS per MHz, so at 20 MHz the device delivers roughly 20 MIPS throughput while drawing low active current. Architecturally, the ATmega644 uses 32 general-purpose working registers directly connected to the ALU, eliminating intermediate register access overhead. Boot-code sections enable field firmware updates through the flash read-while-write mechanism, and hardware debug support is available via debugWIRE. Typical applications include industrial automation controllers, embedded sensor and instrumentation systems, motor and lighting control, and hobby/education platforms such as Arduino-compatible boards via the MightyCore hardware package. Design consideration: this 5V part requires a 4.5V-5.5V rail; the picoPower ATMEGA644PA variant is required for 1.8V-5.5V low-power designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

USD $5,05 Em estoque
ATMEGA644-20PU - 8-bit AVR MCU 64KB 20MHz DIP-40 | Microchip
ATMEGA644-20PU

ATMEGA644-20PU - 8-bit AVR MCU 64KB 20MHz DIP-40 | Microchip

The Microchip Technology ATMEGA644-20PU is an 8-bit AVR enhanced RISC microcontroller with 64KB of In-System Programmable Flash, 4KB of SRAM, 2KB of EEPROM, and a maximum clock frequency of 20 MHz, housed in a 40-pin PDIP (0.600 inch / 15.24 mm) through-hole package. An 8-bit microcontroller is a self-contained computing IC that integrates a processor core, program memory, data memory, and peripherals such as timers, UARTs, and analog-to-digital converters on a single die. Within the product hierarchy, the ATmega644 belongs to the AVR ATmega family of flash-based MCUs, which sit under the broader categories of 8-bit microcontrollers, embedded processors, and integrated circuits. The AVR architecture executes most instructions in a single clock cycle through its 32 general-purpose working registers, delivering high code efficiency for embedded control systems. Key features of the ATMEGA644-20PU include 64KB of self-programmable Flash memory with read-while-write capability, 32 general-purpose I/O lines, two USARTs for serial communication, and three flexible timer/counters with compare modes and PWM outputs. The device also integrates a byte-oriented two-wire serial interface (TWI/I2C), an SPI serial interface, a 10-bit ADC, a programmable watchdog timer with separate on-chip oscillator, and an on-chip analog comparator. Technically, the AVR core uses a Harvard architecture with separate program and data buses. JTAG (IEEE 1149.1 compliant) boundary-scan and on-chip debugging are supported, and In-Circuit Serial Programming (ICSP) allows firmware updates without removing the chip from the board. Boot loader support with self-programming enables field firmware upgrades, while five sleep modes (including power-down and power-save) reduce current consumption in battery-conscious designs. Typical applications include industrial control and automation panels, embedded instrumentation and data loggers, and educational or hobbyist single-board systems. The 40-pin PDIP package is a major advantage for prototyping, repair, and low-volume production, since the chip can be socketed and replaced without soldering equipment. When designing with this device, remember that the full 20 MHz speed grade requires a supply voltage in the higher portion of the operating range; for low-voltage operation at 2.7V to 5.5V the clock frequency must be derated according to the speed-grade curves in the manufacturer datasheet. Decouple VCC and AVCC separately with 100 nF ceramic capacitors placed close to the pins. This page synthesizes distributor pricing, drop-in alternatives from the same ATmega family, design notes, and application guidance not found together on the manufacturer datasheet, with pricing referenced as of 2026-09-18.

USD $7,40 Em estoque
ATMEGA644A-AU - 8-bit AVR MCU 20MHz 64KB Flash | Microchip
ATMEGA644A-AU

ATMEGA644A-AU - 8-bit AVR MCU 20MHz 64KB Flash | Microchip

The Microchip Technology ATMEGA644A-AU is an 8-bit AVR enhanced RISC microcontroller with 64 KB ISP Flash, 4 KB SRAM, and 2 KB EEPROM in a 44-pin TQFP (10x10 mm) package, executing up to 20 MIPS at 20 MHz across a 1.8 V to 5.5 V supply range. An 8-bit microcontroller is a single-chip processor that integrates a CPU, memory, and peripherals onto one die, sitting within the broader hierarchy of semiconductor devices under the microcontroller IC category (MCU -> embedded processor -> integrated circuit). AVR parts from Microchip use an enhanced RISC core that executes most instructions in a single clock cycle, delivering roughly one MIPS per MHz of CPU throughput, which lets designers trade clock speed directly against power consumption. Key features include 64 KB of In-System Programmable Flash with Read-While-Write capability, a 2 KB EEPROM for data retention through power cycles, and 32 general purpose I/O lines. The peripheral set covers three flexible Timer/Counters with compare modes and PWM outputs, two USARTs, a byte-oriented 2-wire interface (TWI, I2C-compatible), and an SPI serial port. An 8-channel 10-bit ADC with an optional internal reference and a Real Time Counter round out the analog and timing resources. Architecturally, the ATmega644A pairs its AVR core with 32 general purpose working registers that are directly connected to the arithmetic logic unit, allowing one-cycle register access. In-System Programming through SPI and self-programming boot code enable field firmware updates without removing the device from the PCB, while code lock bits provide three levels of intellectual property protection. Typical applications include industrial automation nodes such as sensor acquisition and motor control, embedded instrumentation and test fixtures, and educational or hobby embedded platforms supported by Arduino-compatible toolchains like MightyCore. For design, operate the internal RC oscillator or drive XTAL1/XTAL2 with an external crystal up to 20 MHz, and budget brown-out detection configuration carefully when running near the 1.8 V supply floor. This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Pricing references are as of 2026-09-18.

USD $5,40 Em estoque
ATMEGA644A-AUR - 8-bit AVR MCU 64KB Flash 20MHz TQFP-44 | Microchip
ATMEGA644A-AUR

ATMEGA644A-AUR - 8-bit AVR MCU 64KB Flash 20MHz TQFP-44 | Microchip

The Microchip Technology ATMEGA644A-AUR is an 8-bit AVR enhanced RISC microcontroller with 64 KB ISP Flash memory, 4 KB SRAM, and 2 KB EEPROM, executing up to 20 MIPS at a 20 MHz maximum clock frequency in a 44-pin TQFP (10x10 mm) package. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that fetches and executes most instructions in a single clock cycle, making it a core building block of the embedded controller hierarchy (MCU -> microcontroller -> semiconductor). The ATmega644A belongs to the ATmega family that spans the ATmega164A, ATmega324A, ATmega644A, and ATmega1284 devices, all sharing an identical peripheral set and pinout across different Flash densities. Key features include 32 general purpose I/O lines, two programmable serial USARTs, one byte-oriented 2-wire serial interface (TWI/I2C), one SPI interface, an 8-channel 10-bit ADC with optional differential input stage, and three flexible Timer/Counters with compare modes and PWM. A Real Time Counter (RTC) with separate oscillator supports battery-backed timekeeping, and read-while-write Flash allows firmware updates while executing code. Architecturally, the device pairs 64 KB of In-System Programmable Flash with 32 general purpose working registers directly connected to the ALU, so a single-cycle instruction achieves throughput approaching 1 MIPS per MHz. Low-power CMOS process technology plus multiple sleep modes allow system designers to optimize power consumption against processing speed, which is why the family remains popular for cost-sensitive embedded designs. Typical applications include industrial automation controllers, sensor data loggers, motor control interfaces, and hobbyist or Maker boards such as Arduino-compatible systems supported by MCUdude MightyCore. The 20 MHz speed and 4 KB SRAM comfortably handle protocol bridging and display driving tasks. A key design consideration is clock sourcing: the ATmega644A supports an external crystal via XTAL1/XTAL2 pins, and fuse configuration determines clock source and brown-out thresholds, so verify fuses before switching clock schemes. Budget ADC accuracy margin by using a quiet AVCC supply and AREF filtering. This page synthesizes distributor pricing, drop-in family alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet, giving engineers a complete single-source reference. Pricing references are as of 2026-09-18 from distributor data.

USD $2,75 Em estoque
ATMEGA644A-MUR - 8-bit AVR MCU 64KB Flash 20MHz | Microchip
ATMEGA644A-MUR

ATMEGA644A-MUR - 8-bit AVR MCU 64KB Flash 20MHz | Microchip

The Microchip Technology ATMEGA644A-MUR is a high-performance 8-bit AVR RISC microcontroller with 64 KB of In-System Programmable (ISP) Flash memory, 4 KB SRAM, 2 KB EEPROM, and a 20 MHz maximum clock frequency, housed in a 44-pin VQFN (7x7 mm) package with exposed pad. It executes most instructions in a single clock cycle, delivering throughput approaching 1 MIPS per MHz for power-efficient real-time control. An 8-bit AVR microcontroller is a Harvard-architecture processor that separates program and data memory, pairing an enhanced RISC CPU core with on-chip flash, SRAM, and EEPROM. Within the embedded systems hierarchy, the ATmega family sits in the mid-range 8-bit microcontroller tier below 32-bit ARM devices, serving as the complete system-on-chip for cost- and power-sensitive control applications. Key features of the ATMEGA644A-MUR include 64 KB ISP flash with read-while-write capability for self-programming and firmware updates in the field, 32 general purpose I/O lines with internal pull-ups, two flexible USARTs for multi-channel serial communication, a byte-oriented 2-wire (TWI/I2C) interface, an SPI serial port, and three flexible timers/counters with compare modes and PWM channels. A real-time counter supports RTC functions, and JTAG-based on-chip debugging simplifies development. Architecturally, the ATmega644A is a member of the ATmega164A/PA/324A/PA/644A/PA/1284/P family, sharing a common core, peripheral set, and pinout across flash densities. The enhanced RISC core uses 32 general purpose working registers directly connected to the ALU, allowing one register and one memory operand to be processed in a single instruction. The device operates over an industrial temperature range and supports supply options across 2.5V, 3.3V, and 5V rails per distributor listings. Typical applications include industrial automation controllers, building and home automation nodes, motor control and battery management systems, embedded instrumentation, and legacy AVR design maintenance. The 64 KB flash and 4 KB SRAM provide headroom for communication stacks such as Modbus or lightweight TCP implementations that smaller ATmega328 devices cannot host. When designing with this device, note that Microchip application note AVR536 documents reduced low-frequency crystal oscillator drive strength versus the earlier ATmega644, so crystal load capacitance and ESR must be verified during migration. Decouple AVCC separately and place 100 nF ceramics at each supply pin. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

USD $4,31 Em estoque
ATMEGA644P-15AT - 8-bit AVR MCU 64KB Flash 16MHz TQFP-44 | Microchip
ATMEGA644P-15AT

ATMEGA644P-15AT - 8-bit AVR MCU 64KB Flash 16MHz TQFP-44 | Microchip

The Microchip Technology (Atmel) ATMEGA644P-15AT is an 8-bit AVR enhanced RISC microcontroller integrating 64KB of in-system programmable Flash, 4KB SRAM, and 2KB EEPROM in a 44-pin TQFP (10x10 mm) surface-mount package. It executes instructions in a single clock cycle, delivering throughputs approaching 1 MIPS per MHz at its 16MHz maximum operating frequency. The -15AT speed grade is the 16MHz @ 5V industrial variant; the same die is offered as -20AU at 20MHz. A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory (Flash), data memory (SRAM), non-volatile storage (EEPROM), and peripherals such as timers, serial interfaces, and analog-to-digital converters. Within the AVR ATmega hierarchy, the ATmega644P sits in the mid-to-high range: ATmega48 < ATmega88 < ATmega164P < ATmega324P < ATmega644P < ATmega1284, all built on the AVR 8-bit RISC core with Atmel picoPower technology for reduced active and sleep-mode current. Key differentiating features include 32 general-purpose I/O lines, two USARTs (the 'P' suffix denotes the dual-USART enhancement over the original ATmega644), an 8-channel 10-bit ADC with optional differential mode and programmable gain, a byte-oriented 2-wire serial interface (TWI/I2C), SPI, three flexible Timer/Counters with PWM, a Real-Time Counter, and a programmable Watchdog Timer. In-system programmable Flash with Read-While-Write capability allows firmware updates without chip removal. Typical applications include industrial automation nodes, embedded sensor data acquisition with the 10-bit ADC, RS-232/RS-485 communication gateways using dual USARTs, hobbyist/Arduino-compatible designs (supported by the MightyCore hardware package), and AEC-Q100 grade 1 qualified automotive-adjacent systems where -40C to +85C operation is required. When designing, observe the 10x10 mm TQFP land pattern, decouple VCC and AVCC, and verify external crystal drive levels. The two-cycle load/store architecture and Harvard memory layout are transparent to C code but influence interrupt latency. Be aware that ATMEGA644P-15AT is mature and not recommended for new designs - the ATmega644PA successor is preferred. This page synthesizes verified distributor listings, AEC-Q100 qualification references, drop-in family alternatives (including the ATmega644PA successor), and practical design notes not consolidated in the manufacturer datasheet.

USD $4,12 Em estoque
ATMEGA644P-15AZ - 8-bit AVR MCU 64KB 16MHz TQFP-44 | Microchip
ATMEGA644P-15AZ

ATMEGA644P-15AZ - 8-bit AVR MCU 64KB 16MHz TQFP-44 | Microchip

The Atmel/Microchip ATMEGA644P-15AZ is an 8-bit AVR ATmega microcontroller with a 16MHz AVR enhanced RISC core, 64KB (32K x 16) In-System Programmable Flash, 4KB SRAM, and 2KB EEPROM, housed in a 44-pin TQFP (10x10 mm) package. It executes most of its 131 powerful instructions in a single clock cycle, achieving throughput close to 1 MIPS per MHz. An 8-bit microcontroller is an integrated circuit containing a processor core, memory, and programmable peripherals on a single chip, optimized for embedded control. Within the power management and system hierarchy, the ATmega644P sits in the AVR ATmega family of general-purpose 8-bit MCUs, combining flash-based program storage with rich analog and digital peripherals. Key features include 64KB self-programmable Flash, 4KB SRAM, 2KB EEPROM, two USARTs (the P variant adds a second USART versus the non-P ATmega644), a 10-bit ADC with up to 8 channels, JTAG for on-chip debugging, and picoPower low-power technology. Operating voltage is 4.5V to 5.5V at the 16MHz speed grade. Architecturally, the device is based on the AVR enhanced RISC architecture with 32 general-purpose working registers directly connected to the ALU, allowing two independent registers to be accessed in one instruction. The picoPower CMOS process enables power-optimized sleep modes, letting designers trade processing speed against energy consumption. Typical applications include industrial automation and sensor systems, building and HVAC control, motor-control front ends, and general embedded systems where a second UART, JTAG debugging, and 5V operation are required. The TQFP-44 footprint also allows migration to the ATMEGA644PA drop-in successor without PCB redesign. A key design consideration: at 16MHz this part requires 4.5V to 5.5V; for 2.7V to 5.5V low-voltage designs choose the PA variant or lower speed grade. Always validate the ADC reference (AVCC or AREF) decoupling for analog accuracy. This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-18.

USD $4,98 Em estoque
ATMEGA644P-15MT - 8-bit AVR MCU, 64KB Flash, 44-VQFN | Microchip
ATMEGA644P-15MT

ATMEGA644P-15MT - 8-bit AVR MCU, 64KB Flash, 44-VQFN | Microchip

The Microchip Technology ATMEGA644P-15MT is an 8-bit AVR RISC microcontroller with 64KB of In-System Programmable Flash, 4KB of SRAM, 2KB of EEPROM, and a 16MHz maximum core clock, housed in a 44-pin VQFN (7x7 mm) package with exposed pad. It is an Automotive AEC-Q100 qualified member of the AVR ATmega family and the picoPower generation of the ATmega644. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, delivering throughput close to 1 MIPS per MHz. In the power-management hierarchy of embedded systems, a microcontroller such as the ATmega644P sits at the application layer, integrating CPU, program memory, data memory, analog peripherals, and serial interfaces into a single semiconductor device. Key features include 131 powerful instructions, most executed in a single cycle; 32 general purpose I/O lines; two USARTs for dual serial communication; a byte-oriented 2-wire interface (TWI/I2C); an SPI interface; and an 8-channel 10-bit ADC with an optional internal reference. Three flexible Timer/Counters with compare modes and PWM outputs support motor control and lighting applications, and a Real Time Counter (RTC) with separate oscillator supports timekeeping. Technically, the picoPower CMOS process gives the ATmega644P very low active and sleep current consumption, with six power-saving modes including Idle, Power-down, Power-save, and Standby. Software-selectable clock prescalers let designers trade throughput for current, and the internal RC oscillator removes external crystals in cost-sensitive designs. The 64KB Flash supports Read-While-Write operation for safe in-system self-programming via the bootloader. Typical applications include automotive body electronics and sensor nodes (leveraging the AEC-Q100 qualification), industrial control and HMI boards, battery-powered instrumentation, and dual-UART gateways bridging RS-232/RS-485 to system diagnostics. The dual USART and 4KB SRAM make it well suited to protocol conversion tasks that exceed smaller ATmega parts. A key design consideration is that Microchip lists this part as a mature product, not recommended for new designs, replaced by the ATmega644PA; pin-to-pin migration to the PA variant preserves the footprint while improving power performance. Verify end-of-life status and long-term supply before committing to new layouts. This page synthesizes distributor pricing, drop-in alternatives, design notes, and lifecycle guidance not found in the manufacturer datasheet alone.

USD $5,90 Em estoque
ATMEGA644P-20AQR - 8-bit AVR MCU 64KB 20MHz TQFP-44 | Microchip
ATMEGA644P-20AQR

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

The Microchip Technology ATMEGA644P-20AQR is an 8-bit AVR ATmega microcontroller delivering 20MHz operation, 64KB (32K x 16) In-System Programmable Flash, 4KB SRAM and 2KB EEPROM in a 44-pin TQFP (10 x 10 mm) surface-mount package. An 8-bit microcontroller is an integrated circuit that executes program instructions, manages peripherals, and interfaces with sensors and actuators using 8-bit-wide data words. The ATmega644P belongs to the AVR family of enhanced RISC microcontrollers, which sits within the broader hierarchy of embedded processors and power-efficient system-on-chip solutions for cost-sensitive control applications. Key features include the AVR enhanced RISC architecture executing 131 powerful instructions, most in a single clock cycle, for throughput close to 1 MIPS per MHz. The dual-UAVR 'P' variant adds a second USART, enabling two independent serial communication channels. Peripherals include an 8-channel 10-bit ADC, JTAG for on-chip debugging, and an internal oscillator option. The picoPower family heritage supports low-power design strategies. Technically, the device achieves single-cycle ALU operation through its advanced RISC pipeline, letting system designers trade processing speed directly against power consumption. Program memory is In-System Programmable via SPI (ICSP), and the JTAG interface supports boundary-scan and in-circuit debugging with tools such as the MPLAB SNAP. Typical applications include industrial automation controllers, embedded sensing and data-logging nodes, and hobby/education platforms such as 3D printer controllers, where two hardware UARTs simplify communication with both a host and a peripheral. When designing with this part, verify supply-voltage tolerance against your clock target: full 20MHz operation is specified at the 5V industrial supply range noted by distributor data. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with prices as of 2026-09-18.

USD $5,95 Em estoque
ATMEGA644P-20AU - 8-Bit AVR MCU 20MHz 64KB Flash TQFP-44 | Microchip
ATMEGA644P-20AU

ATMEGA644P-20AU - 8-Bit AVR MCU 20MHz 64KB Flash TQFP-44 | Microchip

The Microchip Technology ATMEGA644P-20AU is an 8-bit AVR RISC microcontroller with 64KB (32K x 16) in-system programmable FLASH, 4KB SRAM, 2KB EEPROM, and a 20MHz maximum clock, housed in a 44-pin TQFP (10x10 mm) package operating from 4.5V to 5.5V over the industrial temperature range. An 8-bit microcontroller is a self-contained computing IC that integrates a CPU core, program memory, data memory, and peripherals such as UARTs, timers, ADCs, and SPI/I2C interfaces on a single die. Within the power-management hierarchy of an embedded system, the MCU sits at the control layer, executing firmware that orchestrates sensors, actuators, and communication links. The AVR family, originally developed by Atmel and now part of Microchip Technology, executes most instructions in a single clock cycle, delivering approximately 1 MIPS per MHz. Key features of the ATmega644P include the advanced AVR RISC architecture with 130 powerful instructions and 32 general-purpose working registers, up to 20 MIPS throughput at 20MHz, and two programmable serial USARTs. The P suffix denotes the enhanced variant with PicoPower-class low-power features and an additional USART compared with the base ATmega644. Technical depth: the device integrates a 10-bit ADC, SPI and TWI (I2C) serial interfaces, multiple PWM-capable timers, an on-chip debug capability, and in-system programming (ISP) via the SPI interface. Self-programming FLASH enables boot-loader firmware updates in the field. Typical applications include industrial control panels, motor control and power-supply supervision, metering and sensor-hub nodes, and legacy Arduino-compatible boards that use the ATmega644P core. Design consideration: the 20MHz grade requires 4.5V to 5.5V operation; for 3.3V designs, derate the clock or choose a PicoPower ATmega644PA variant. Decouple AVCC and VCC separately for ADC accuracy. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.

USD $3,95 Em estoque
ATMEGA644P-20MQ - 8-bit AVR MCU 64KB 20MHz VQFN-44 | Microchip
ATMEGA644P-20MQ

ATMEGA644P-20MQ - 8-bit AVR MCU 64KB 20MHz VQFN-44 | Microchip

The Microchip Technology ATMEGA644P-20MQ is a low-power 8-bit AVR ATmega microcontroller featuring 64KB (32K x 16) FLASH program memory, 4KB SRAM, 2KB EEPROM, and a 20MHz CPU delivering up to 20 MIPS, housed in a 44-pad VQFN (7x7 mm) package with exposed pad. It operates from a 5V supply across an extended industrial temperature range. An 8-bit microcontroller is an integrated circuit that combines a processor core, memory, and peripherals such as UARTs, timers, and ADCs on a single chip, forming the lowest tier of the embedded-computing hierarchy (MCU -> embedded processor -> system-on-chip). AVR MCUs like the ATmega644P use an enhanced RISC Harvard architecture in which most of the 131 instructions execute in a single clock cycle, yielding throughput close to 1 MIPS per MHz. Key features of the ATMEGA644P-20MQ include dual UARTs (2-USART digital communication peripherals), picoPower low-power technology for sleep-current-sensitive designs, an internal RC oscillator that eliminates external crystals in many designs, and 32 general-purpose I/O lines organized as four 8-bit ports (PA-PD). The P suffix denotes the two-USART variant of the ATmega644 family. The AVR core pairs the RISC engine with peripherhals including 8/16-bit timers with PWM, a 10-bit ADC with multiplexed inputs on port A, TWI (I2C-compatible) and SPI serial interfaces, brown-out detection, and in-circuit serial programming (ICSP) via the reset line using only two device I/O pins. The exposed-pad VQFN-44 package improves thermal performance and grounding over the TQFP variant. Typical applications include industrial automation nodes, sensor acquisition systems, motor control front-ends, and embedded controllers where 64KB of flash, dual serial ports, and 5V noise immunity are required. Design consideration: the manufacturer has marked the ATmega644P as a mature product not recommended for new designs; new boards should target the ATmega644PA, which is a pin-compatible drop-in with lower active and sleep current. This page synthesizes verified distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

USD $2,48 Em estoque
ATMEGA644P-20MQR - 8-Bit AVR MCU 20MHz 64KB | Microchip
ATMEGA644P-20MQR

ATMEGA644P-20MQR - 8-Bit AVR MCU 20MHz 64KB | Microchip

The Microchip (Atmel) ATMEGA644P-20MQR is a high-performance, low-power 8-bit AVR RISC microcontroller running at 20 MHz with 64 KB of Flash program memory, 4 KB of SRAM, and 2 KB of EEPROM, housed in a 44-pin VQFN (7x7 mm, MLF) exposed-pad package rated for the extended industrial temperature range of -40C to +105C. An 8-bit AVR microcontroller is a single-chip computer that combines an enhanced RISC CPU, program and data memory, and a rich set of peripherals on one die. Within the broader product hierarchy, it belongs to the ATmega family of AVR MCUs, which in turn sit under the microcontroller and embedded-processor categories of the semiconductor taxonomy. Key features include 131 powerful instructions with mostly single-clock-cycle execution, achieving close to 1 MIPS per MHz throughput. The 'P' variant adds a second USART, giving two full-duplex serial ports, plus SPI, two-wire interface (TWI/I2C), a 10-bit 8-channel ADC, two 8-bit and one 16-bit timers, and JTAG for on-chip debugging and boundary scan. picoPower technology supports low-power sleep modes for battery-sensitive designs. Architecturally, the device executes powerful instructions in a single clock cycle, letting system designers optimize the trade-off between processing speed and power consumption. In-system programmable (ISP) Flash via In-Circuit Serial Programming (ICSP) simplifies field updates, and debugging is supported through the MPLAB Snap and compatible AVR tools using two I/O pins plus reset. Typical applications include industrial automation controllers, dual-channel serial communication gateways using the twin USARTs, and precision analog sensor acquisition via the 8-channel 10-bit ADC. Design consideration: full 20 MHz operation requires a supply of 4.5V to 5.5V; lower-voltage operation derates the maximum safe clock frequency, so verify the frequency-versus-voltage curve before clocking down. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.

USD $4,30 Em estoque
ATMEGA644P-20MU - 8-bit AVR MCU 20MHz 64KB Flash | Microchip
ATMEGA644P-20MU

ATMEGA644P-20MU - 8-bit AVR MCU 20MHz 64KB Flash | Microchip

The Microchip Technology ATMEGA644P-20MU is an 8-bit AVR ATmega microcontroller delivering 20MHz clock operation, 64KB (32K x 16) of In-System Programmable Flash memory, and 4KB of SRAM in a 44-pin VQFN (7x7 mm) exposed-pad package. It is a low-power CMOS device based on the AVR enhanced RISC architecture, executing most instructions in a single clock cycle for throughputs approaching 1 MIPS per MHz. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals. In the hierarchy of embedded semiconductors, the ATmega644P sits in the 8-bit microcontroller class of the AVR family, a predecessor to modern AVR DA/DB parts and a sibling to the ATmega328P and ATmega1284P. Key features include 2KB of EEPROM for non-volatile data storage, two USARTs (the P variant adds a second serial port versus the standard ATmega644), a 10-bit ADC with up to 8 channels, an SPI interface, a two-wire I2C-compatible interface, and a JTAG interface for on-chip debug and boundary scan. The device operates at 5V (Vcc range 4.5V to 5.5V at 20MHz per the industrial temperature, green variant), making it robust for noisy environments where 3.3V MCUs are less tolerant. Technically, the AVR core uses a Harvard architecture with separate program and data buses and 32 general-purpose working registers directly connected to the ALU. This single-cycle execution model allows deterministic timing that remains popular in bit-banged protocols, motor control loops, and legacy firmware maintenance. Low-voltage capability down to 1.8V is supported by family members at reduced clock rates, per AVR505 application note on migration between ATmega16/32 and ATmega164P/324P/644P. Typical applications include industrial control panels, sensor acquisition nodes, embedded instrumentation, serial-protocol bridges using the dual USART, and hobby/education platforms that keep large installed firmware bases alive. A key design consideration: Microchip lists the ATmega644P as a mature product not recommended for new designs, replaced by the pin-compatible ATmega644PA; new boards should target the PA while service designs can continue with this part. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

USD $5,02 Em estoque
ATMEGA644P-20PQ - 8-bit AVR MCU 20MHz 64KB Flash DIP-40 | Microchip
ATMEGA644P-20PQ

ATMEGA644P-20PQ - 8-bit AVR MCU 20MHz 64KB Flash DIP-40 | Microchip

The Microchip Technology ATMEGA644P-20PQ is a high-performance, low-power 8-bit AVR ATmega microcontroller delivering 20MHz maximum clock speed, 64KB of In-System Programmable Flash, 4KB SRAM and 2KB EEPROM, housed in a 40-pin PDIP package rated for the extended temperature range. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, achieving throughputs close to 1 MIPS per MHz. Within the power management and embedded control hierarchy, the ATmega family sits in the mid-range segment between the small ATmega48/328 devices and the larger ATmega1284/2560 parts, making it a common choice for self-contained embedded systems that need substantial Flash without moving to 32-bit architectures. Key features include the AVR enhanced RISC architecture with 131 powerful instructions, two on-chip UARTs (the P suffix denotes the dual-UART variant with a second USART), an internal RC oscillator, 32 general-purpose I/O lines, and JTAG for on-chip debugging and boundary scan. The device operates from 2.7V to 5.5V, with 20MHz operation specified at 4.5V to 5.5V, and it supports In-System Programming (ISP) as well as self-programming via a boot loader section. The picoPower CMOS process gives the family flexible power management: idle, power-down, power-save, standby, and extended standby sleep modes allow the system designer to trade processing speed directly against power consumption, a capability Atmel documented as achieving close to 1 MIPS per MHz throughput efficiency. Typical applications include industrial control panels, test fixtures and instrumentation where the 40-pin DIP package simplifies prototyping and socketed replacement, educational and hobby platforms, and legacy system maintenance where through-hole technology is required. A key design consideration: Microchip lists this mature device as not recommended for new designs and replaced by ATmega644PA, so new products should target the PA variant, while this part remains useful for maintaining existing socketed designs. This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing references as of 2026-09-18.

USD $7,40 Em estoque
ATMEGA644P-20PU - 8-bit AVR MCU 20MHz 64KB Flash | Microchip
ATMEGA644P-20PU

ATMEGA644P-20PU - 8-bit AVR MCU 20MHz 64KB Flash | Microchip

The Microchip Technology ATMEGA644P-20PU is an 8-bit AVR ATmega microcontroller delivering up to 20 MIPS throughput at 20 MHz, with 64KB (32K x 16) ISP Flash memory, 4KB SRAM, and 2KB EEPROM, packaged in a 40-pin PDIP (PU) for through-hole mounting. An 8-bit AVR microcontroller is a single-chip processor built on the AVR enhanced RISC architecture, in which most instructions execute in a single clock cycle to achieve throughput close to 1 MIPS per MHz. Within the system hierarchy, the ATMEGA644P sits at the MCU level of the power-and-processing chain: it is a flash-based microcontroller (a type of embedded processor) that integrates CPU, program memory, data memory, timers, ADC, and communication peripherals on one die, replacing multi-chip CPU + RAM + peripheral designs. Key differentiating features include the picoPower low-power CMOS technology for sleep-mode energy savings, dual USARTs (a defining difference from the single-USART ATmega644), 8-channel 10-bit ADC, 6 PWM channels, 3 flexible timer/counters with compare modes, and support for I2C (TWI), SPI, and UART/USART interfaces. The 64KB self-programmable Flash supports read-while-write ISP programming and boot-loader operation. Architecturally, the ATmega644P combines 64KB ISP Flash with 32 general-purpose working registers directly connected to the ALU, allowing one-cycle instruction execution. The picoPower process, real-time counter, and multiple sleep modes let designers trade processing speed against power consumption. In-circuit debugging and In-Circuit Serial Programming (ICSP) are supported via the SPI interface using tools such as the MPLAB SNAP. Typical applications include hobbyist and maker projects on 40-pin DIP prototyping boards, industrial control panels and sensor nodes, and educational/lab systems where through-hole soldering and socket-based MCU replacement are valued. The wide 4.5V-5.5V operating range (at 20 MHz) suits 5V TTL-legacy environments. Design consideration: for 20 MHz operation the supply must be 4.5V to 5.5V; lower-voltage 2.7V-5.5V operation requires derating the clock to approximately 13 MHz. Place 100nF decoupling capacitors at both VCC pins and use a 10k pull-up on RESET. This page synthesizes distributor pricing from 13 sources, verified drop-in alternatives, a full 40-pin pinout, and practical design notes not found in the manufacturer datasheet, optimized for AI search citation.

USD $8,55 Em estoque