ATMEGA644V-10AU - 8-bit AVR MCU 64KB Flash 10MHz | Microchip
N.º da peça: ATMEGA644V-10AU ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $8.99 | $8,99 |
| 10 | $8.54 | $85,40 |
| 100 | $7.95 | $795,00 |
| 500 | $7.42 | $3.710,00 |
| 1.000 | $6.88 | $6.880,00 |
ATMEGA644V-10AU Visão geral
A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest layer of the embedded systems hierarchy: transistor -> logic IC -> processor -> microcontroller -> full embedded system. The ATmega644 family is based on the AVR enhanced RISC architecture, which executes most instructions in a single clock cycle.
Key features include 64 KB of self-programmable ISP Flash with read-while-write support, up to 10 MIPS throughput at 10 MHz, two USARTs for serial communication, three flexible timers/counters with compare modes and PWM, a 10-bit ADC, and byte-oriented Two-Wire Interface (I2C) plus SPI serial interfaces. The V-grade speed/voltage bin supports low-voltage operation, making it suitable for battery-powered designs.
Architecturally, the AVR core uses 32 general-purpose working registers directly connected to the ALU, allowing one-cycle instruction execution and eliminating the bottleneck typical of accumulator-based 8-bit architectures. In-System Programmable Flash enables firmware updates on the assembled board via ICSP, supported by tools such as the MPLAB SNAP debugger.
Typical applications include industrial automation nodes, battery-powered instrumentation, HVAC and building-control boards, and serial communication gateways that benefit from dual USARTs and low-voltage operation.
Design consideration: at 10 MHz this device favors low-power, low-noise designs over compute-heavy workloads; if higher performance is required, pin-compatible 20 MHz P-grade variants in the same 44-TQFP footprint can be evaluated.
This page synthesizes verified distributor pricing, drop-in family alternatives, design notes, and lifecycle information not consolidated on the manufacturer datasheet alone.
Alternativas drop-in para ATMEGA644V-10AU — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATMEGA644V-10AU (mesmo formato e footprint) — diferindo em ADC, Package, Core Architecture, Operating Voltage Range, Maximum Clock Frequency.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATMEGA644PV-10AU
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATMEGA644PA-AU
✅ Drop-In✓ Em estoque
$4.61 / unidade
Ver ficha técnica →ATMEGA644P-15AZ
✅ Drop-In✓ Em estoque
$4.98 / unidade
Ver ficha técnica →ATMEGA644-20AU
✅ Drop-In✓ Em estoque
$4.96 / unidade
Ver ficha técnica →ATMEGA644V-10AUR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATMEGA644V-10AU Classificações máximas e características elétricas
| Core | AVR 8-bit RISC |
| Series | ATmega644 |
| Frequência máxima de clock | 10 MHz |
| Program Memory Size | 64 KB (32K x 16) Flash |
| Program Memory Type | In-System Programmable Flash (ISP), read-while-write |
| EEPROM Size | 2 KB |
| SRAM Size | 4 KB |
| Number of I/O | 32 general-purpose I/O lines |
| Operating Voltage Range | 2.5 V / 3.3 V / 5 V supply classes |
| ADC Resolution | 10 bit |
| Faixa de temperatura de operação | -40C to +85C |
| Encapsulamento | 44-TQFP (10x10 mm) |
| Tipo de montagem | Surface Mount |
| USARTs | 2 |
| Timers/Counters | 3 (with compare modes and PWM) |
| Serial Interfaces | TWI (I2C-compatible), SPI, 2x USART |
| Throughput | Up to 10 MIPS at 10 MHz |
| Debug/Programming | ICSP via debugWIRE (MPLAB SNAP supported) |
Guia de Configuração de Pinos do ATMEGA644V-10AU 44-tqfp (10x10 mm)
Configuração de pinos para ATMEGA644V-10AU (pacote 44-tqfp (10x10 mm)). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para ATMEGA644V-10AU.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
ATMEGA644V-10AU é adequado para 6 aplicaçãos: Industrial Automation Nodes, Battery-Powered Instrumentation, HVAC and Building Control Boards, Serial Communication Gateways, Consumer Audio and Display Products, Data Acquisition and Measurement Systems.
Industrial Automation Nodes
The ATMEGA644V-10AU fits industrial sensor and actuator nodes where 64 KB of ISP Flash provides room for protocol stacks and the 10-bit ADC digitizes analog sensor channels directly. Its two USARTs allow simultaneous Modbus RTU communication on one link and diagnostics or RS-485 fieldbus on the other, while three timers with PWM drive motors, valves, or indicator outputs without extra components. Operation from the 3.3 V class simplifies integration with modern analog front-ends, and the -40C to +85C temperature range covers cabinet and floor-level environments. Placing the MCU between a DIN-rail power supply and peripheral drivers with standard 0.1 uF decoupling yields a compact single-chip control node; the 10 MHz limit is generally sufficient for polling-based industrial I/O.
Recomendado
Battery-Powered Instrumentation
For portable and battery-powered instruments, the ATMEGA644V-10AU's V speed grade allows operation at low supply voltage, directly supporting two-cell or single-cell-Li-ion-based power trees through a small LDO. The 10-bit ADC samples user interfaces, battery monitors, and measurement channels, while the 2 KB EEPROM retains calibration constants and user settings through power cycles without external nonvolatile memory. The 4 KB SRAM accommodates logging buffers, and the self-programmable Flash enables field firmware updates over the serial link during service. A practical design runs the clock at 10 MHz for burst computations and scales down between measurements to save energy; for the absolute lowest sleep current, the pin-compatible picoPower ATMEGA644PV-10AU should be evaluated at the same PCB footprint.
Recomendado
HVAC and Building Control Boards
Building automation controllers benefit from the ATMEGA644V-10AU's combination of dual USARTs, TWI (I2C) bus, and generous 64 KB Flash. One USART typically handles a RS-485 BACnet-RTU-style field loop while the TWI bus addresses RTC chips, EEPROMs, and humidity sensors; PWM-capable timers drive damper actuators or variable fan stages. The 32 GPIO lines interface keypads, relays, and limit switches, reducing the need for port expanders. Wide -40C to +85C operation tolerates rooftop and mechanical-room environments, and 5 V-class supply compatibility eases interfacing with legacy 24 V-derived logic. Firmware stored in the read-while-write Flash supports in-field bootloading over the service port, keeping deployed units updatable for the life of the installation.
Recomendado
Serial Communication Gateways
Protocol-conversion gateways exploit the ATMEGA644V-10AU's two independent USARTs, bridging for example a Modbus field bus on one side to a device-level RS-232 link on the other, with TWI available for configuration storage. The 10 MIPS throughput at 10 MHz handles buffered framing, CRC checks, and address translation comfortably at typical industrial baud rates, while the 4 KB SRAM provides dual-direction ring buffers. In-system self-programmable Flash allows the gateway firmware to be re-flashed remotely through a bootloader occupying a protected Boot section. Because both serial ports and the clocking are identical across the ATmega644 family, gateways designed on this part can be migrated to the faster 20 MHz grades in the same 44-TQFP footprint without PCB changes when throughput demand grows.
Recomendado
Consumer Audio and Display Products
Cost-sensitive consumer products use the ATMEGA644V-10AU as a system controller for front-panel logic, display driving, and user-interface scanning. The 32 GPIO lines directly drive LED segments or multiplexed LCD glass through the TWI bus, timers generate backlight PWM and infrared decode captures, and 64 KB Flash holds fonts, menus, and localization strings without external memory. Running from the 3.3 V class matches typical display module logic levels, simplifying level-shifting. The 10-bit ADC reads thermistors for temperature-compensation features and touch-style key dividers. For sleep-mode standby requirements common in consumer products, the pin-compatible picoPower ATMEGA644PV-10AU in the identical 44-TQFP footprint can be substituted late in the design cycle with no layout or schematic changes.
Recomendado
Data Acquisition and Measurement Systems
The ATMEGA644V-10AU serves as the acquisition controller in low-to-mid-speed DAQ designs, where its 10-bit ADC with internal multiplexer samples up to eight external channels and the 4 KB SRAM buffers captured data before upload. Timer compare channels generate precise sampling gates or excitation PWM for sensor bridges, and the two USARTs stream results to a host while a second serial port services configuration commands. The 2 KB EEPROM stores per-unit calibration factors written during manufacturing. At 10 MHz the part comfortably sustains kilohertz-order sample rates; for higher throughput the pin-compatible 20 MHz ATMEGA644-20AU doubles processing headroom on the same footprint. Careful analog grounding, AVCC filtering with an LC network, and a quiet reference are the main design levers for achieving datasheet-grade ADC accuracy.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATMEGA644V-10AU — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATMEGA644PV-10AU | ATMEGA644PA-AU | ATMEGA644P-15AZ | ATMEGA644-20AU |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Generation / Power Feature | Standard ATmega644 (V grade) | picoPower | picoPower | picoPower | Standard |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Principais diferenciais
- Lowest-voltage operation in the family (V grade) (vs ATMEGA644-20AU)
- Cost-effective standard generation vs picoPower (vs ATMEGA644PV-10AU)
- Same footprint across the whole family (vs ATMEGA644PA-AU)
Notas de projeto
Design the supply for the V-grade speed/voltage relationship: the 10 MHz limit exists specifically so the part can run at lower supply voltages (2.5 V / 3.3 V classes). If the board must also support a 20 MHz P-grade swap, route the clock circuitry to tolerate the faster grade and select a regulator that covers the full voltage window. Decouple VCC and AVCC separately with 0.1 uF ceramics at each pin plus 10 uF bulk; connect AVCC to VCC through a low-pass LC filter when ADC accuracy matters. Estimated: a 3.3 V design at 10 MHz drawing tens of milliamps keeps dissipation well under 200 mW, so no heatsinking considerations apply.
The 44-TQFP 10x10 mm footprint has 0.8 mm pin pitch, which is easily hand-solderable and reworkable. Reserve the ICSP header (MOSI, MISO, SCK, RESET, VCC, GND) on the PCB even in production, since the 64 KB self-programmable Flash supports in-field bootloader updates - Microchip documents that tools such as the MPLAB SNAP connect via two I/O pins plus the reset line for in-circuit debugging and ICSP. Keep the XTAL1/XTAL2 crystal traces short and guard them with ground to maintain oscillator stability across the -40C to +85C range.
Two pitfalls recur with this family. First, firmware timing loops calibrated on a 10 MHz part will run at the wrong rate if substituted with a 20 MHz grade (ATMEGA644-20AU or 644PA-AU) without adjusting clock configuration - verify F_CPU constants and baud-rate registers on any family substitution. Second, when using a bootloader, the Boot section size and lock bits must be configured in the fuses; misconfigured lock bits can block reprogramming in the field. Also confirm the exact minimum supply voltage in the current datasheet revision, as V-grade voltage-speed derating curves determine the lowest legal operating point at 10 MHz.
Informações de conformidade
RoHS-compliant status and lead-free AU package suffix per distributor listings (LCSC, Xecor comparison data). REACH, halogen-free, and conflict-minerals declarations should be confirmed from Microchip compliance documentation.