ATMEGA329V-8MI - 8-bit AVR MCU, 32KB Flash, 8MHz, 64-QFN | Microchip
Артикул: ATMEGA329V-8MI ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $8.45 | $8,45 |
| 10 | $7.62 | $76,20 |
| 100 | $6.83 | $683,00 |
| 500 | $6.1 | $3.050,00 |
| 1.000 | $5.45 | $5.450,00 |
ATMEGA329V-8MI Обзор
An 8-bit AVR microcontroller is a Harvard-architecture single-chip MCU built around a RISC instruction set optimized for deterministic single-cycle execution. ATmega series parts integrate Flash program memory, SRAM, EEPROM, peripherals, and a core in one device; they sit in the product hierarchy between bare 8051 cores and 32-bit ARM Cortex-M0 microcontrollers, balancing code density, ease of use (free Atmel Studio / Microchip Studio toolchain), and ultra-low power consumption for embedded applications.
Key features include 130 powerful AVR instructions (most single-cycle), 32 x 8 general-purpose working registers, an 8-channel 10-bit ADC, hardware LCD controller supporting up to 40 segments, four PWM channels, two USARTs, an SPI interface, a TWI (I2C-compatible) interface, and an on-chip debugWIRE interface for in-system programming and debugging. The integrated LCD driver eliminates an external controller, reducing BOM cost in meter and instrument designs.
The architecture uses a pipelined RISC core achieving throughput approaching 1 MIPS per MHz. The nonvolatile program and data memories support in-system reprogramming via SPI or parallel programming, with at least 10,000 write/erase cycles endurance. Multiple sleep modes (Idle, Power-save, Power-down, Standby, Extended Standby) and a low-power RTC reduce quiescent current to a few microamps.
Typical applications include battery-powered utility meters, white goods and appliance HMIs, sensor front-ends with integrated LCD readouts, industrial control panels, and any embedded system requiring up to 32KB of self-programmable Flash with a built-in segmented LCD controller.
When designing with this MCU, note that the 'V' variant shares the same die and pinout as the non-'V' ATmega329 but limits maximum clock to 8MHz to guarantee operation down to 1.8V; code written for the 5V ATmega329 must respect the lower f_CPU ceiling.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the bare datasheet to accelerate your bring-up.
Аналоги без доработки для ATMEGA329V-8MI — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с ATMEGA329V-8MI (тот же форм-фактор и посадочное место) — отличается по Package, Operating Temperature, ADC, LCD Controller, Communication Interfaces.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
ATMEGA329V-8AI
✅ Прямая замена✓ В наличии
$4.45 / шт.
Открыть даташит →ATMEGA329PV-10MUR
✅ Прямая замена✓ В наличии
$3.99 / шт.
Открыть даташит →ATMEGA329PA-MUR
✅ Прямая замена✓ В наличии
$3.85 / шт.
Открыть даташит →ATMEGA329A-MUR
✅ Прямая замена✓ В наличии
$3.61 / шт.
Открыть даташит →ATMEGA329-16AUR
✅ Прямая замена✓ В наличии
$2.15 / шт.
Открыть даташит →ATMEGA3290V-8AUR
✅ Прямая замена✓ В наличии
$2.3 / шт.
Открыть даташит →ATMEGA329V-8MI Максимальные параметры и электрические характеристики
| Core Architecture | 8-bit AVR RISC |
| Program Memory (Flash) | 32 KB (16K x 16) |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Максимальная тактовая частота | 8 MHz |
| Operating Voltage | 1.8 V to 5.5 V (low-voltage 'V' variant) |
| Рабочая температура | -40 C to +85 C (industrial) |
| ADC | 8-channel, 10-bit |
| LCD Controller | Integrated, up to 40 segments |
| PWM Channels | 4 |
| USART | 2 |
| SPI | 1 (Master/Slave) |
| TWI (I2C-compatible) | 1 |
| Корпус | 64-pin QFN (9x9 mm) with exposed pad |
| I/O Pins | 54 programmable I/O lines |
| In-System Programming | Yes (SPI / debugWIRE) |
| Статус RoHS | Compliant |
Руководство по цоколевке ATMEGA329V-8MI в корпусе 64-pin qfn (9x9 mm) with exposed pad
Цоколевка для ATMEGA329V-8MI (корпус 64-pin qfn (9x9 mm) with exposed pad). Эта цифровая ИС включает выводы GPIO, интерфейсы связи (UART, SPI, I2C) и выводы питания. Обратитесь к техническому описанию производителя для альтернативных функций выводов и вариантов конфигурации. Необходимо для проектирования встраиваемых систем и трассировки печатных плат.
Нет подробных данных о распиновке для ATMEGA329V-8MI.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
ATMEGA329V-8MI подходит для 6 применениеs: Smart Electricity Meter with LCD Display, Appliance HMI Controller, Battery-Powered Sensor Reader with LCD, Industrial Control Panel Indicator, Medical Point-of-Care Diagnostic Reader, Automotive Aftermarket Gauge Cluster.
Smart Electricity Meter with LCD Display
The ATMEGA329V-8MI is purpose-built for single-phase smart electricity meters where an integrated segmented LCD controller directly drives the meter's display without an external driver IC. Its 1.8V-5.5V operation supports battery-backed RTC and metrology supply rails, while the 32KB Flash holds metering firmware plus DLMS/COSEM or Modbus protocol stacks. Eight ADC channels digitize voltage and current sensing front-ends (shunt or CT), and the on-chip debugWIRE interface enables in-field firmware updates via optical port. Low-power modes (Power-down draws a few microamps) extend battery life during brownouts.
Рекомендуется
Appliance HMI Controller
Washing machines, dishwashers, and induction cookers use the ATMEGA329V-8MI as the front-panel HMI controller, driving 4x25 segment LCDs that show cycle status, temperature, and timer. Four PWM channels control motor triac firing or buzzer tones; the two USARTs link to a main appliance controller and a service diagnostic port. Operating from 1.8V allows direct connection to a 2xAA backup supply during power loss, preserving user settings stored in the 1KB EEPROM.
Рекомендуется
Battery-Powered Sensor Reader with LCD
Field-portable data loggers for environmental, agricultural, or industrial sensor monitoring benefit from the ATMEGA329V-8MI's 1.8V operation, integrated LCD driver, and AVR low-power sleep modes. The 8-channel 10-bit ADC interrogates sensors (temperature, humidity, soil moisture) while TWI (I2C) connects to external digital sensors like the MCP9808. Two AA cells provide months of runtime thanks to Power-down currents under 1uA with RTC running, and 32KB Flash supports on-device data compression before bulk transmit via USART.
Рекомендуется
Industrial Control Panel Indicator
Control panels for HVAC, access control, and pump stations deploy the ATMEGA329V-8MI to drive 7-segment-style LCDs showing setpoint, status icons, and alarm indicators. The 54 programmable I/O lines accommodate many mechanical or capacitive buttons, while the TWI interface links to a host PLC for supervisory commands. Industrial -40C to +85C temperature rating allows deployment in unheated control cabinets, and the 64-QFN compact footprint fits behind small LCD modules.
Рекомендуется
Medical Point-of-Care Diagnostic Reader
Portable diagnostic devices (glucose meters, INR readers, hemoglobin analyzers) use the ATMEGA329V-8MI as the main controller because the integrated LCD controller directly drives the alphanumeric patient display, eliminating a costly external driver. The 32KB Flash accommodates assay calibration curves, EEPROM stores patient records, and the ADC digitizes colorimetric or electrochemical sensor outputs. Low-voltage operation enables primary-cell battery designs, while the -40C to +85C range suits field deployment.
Рекомендуется
Automotive Aftermarket Gauge Cluster
Aftermarket automotive gauges (boost, oil pressure, EGT) leverage the ATMEGA329V-8MI's LCD driver and PWM channels for backlight dimming and warning beeps. While not AEC-Q100 qualified itself, the part is widely used in non-safety automotive accessories where industrial temperature range suffices. Four PWM outputs drive gauge stepper or servo motors, two USARTs interface with OBD-II adapters, and SPI connects to high-speed external ADC like the MCP3201 for fast sensor sampling.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для ATMEGA329V-8MI — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | ATMEGA329V-8AI | ATMEGA329PV-10MUR | ATMEGA329PA-MUR | ATMEGA329A-MUR | ATMEGA329-16AUR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9 mm) | 64-TQFP | 64-QFN | 64-QFN | 64-QFN | 64-TQFP |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| Max Clock | 8 MHz | 8 MHz | 10 MHz | 20 MHz | 20 MHz | 16 MHz |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| LCD Controller | 4x25 segments | 4x25 segments | 4x25 segments | 4x25 segments | 4x25 segments | 4x25 segments |
| ADC Channels | 8 x 10-bit | 8 x 10-bit | 8 x 10-bit | 8 x 10-bit | 8 x 10-bit | 8 x 10-bit |
| Temperature Range | -40 C to +85 C (I grade) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Ключевые отличия
- Lowest operating voltage in ATmega329 QFN family (против ATMEGA329A-MUR)
- Lower active current at same clock (против ATMEGA329-16AUR)
- Compact 9x9 mm QFN footprint (против ATMEGA329V-8AI)
Заметки по проектированию
Estimated: Active current consumption at 3.3V, 8MHz, is approximately 5-6 mA; Power-down mode with RTC running drops below 1 uA. To preserve battery life in low-power designs, switch the system clock prescaler to divide-by-256 before entering Idle and use Power-down mode between sensor reads, waking via watchdog or external interrupt on INT0/INT1.
The 64-QFN package has an exposed thermal pad that must be soldered to a ground copper pour for mechanical reliability and thermal dissipation. Place a via array (4-9 vias, 0.3 mm drill, 0.5 mm pitch) under the pad to sink heat and reduce ground impedance. Decouple VCC and AVCC pins with 100 nF ceramic capacitors placed within 3 mm of each pin, plus a bulk 4.7-10 uF tantalum or ceramic on the main rail.
The 'V' low-voltage variant has a maximum clock of 8 MHz; code written for the 16 MHz or 20 MHz variants of ATmega329 will exceed timing budgets if reused as-is. Verify all UART baud-rate divisors, ADC prescaler settings, and timer overflow intervals against an 8 MHz F_CPU. Also note that in-system programming via debugWIRE requires the RESET pin to remain free of external pull-ups stronger than 10 kohm; the debugWIRE pin is multiplexed with the RESET pin.
Информация о соответствии
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified; this is an industrial-grade part. Use ATmega automotive-grade parts for AEC-Q100 designs.
