ATMEGA3209-MU - 32KB AVR 8-Bit MCU 20MHz 48-QFN | Microchip
Артикул: ATMEGA3209-MU ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $1.42 | $1,42 |
| 10 | $1.28 | $12,80 |
| 100 | $1.14 | $114,00 |
| 500 | $1.05 | $525,00 |
| 1.000 | $0.96 | $960,00 |
| 3.000 | $0.89 | $2.670,00 |
ATMEGA3209-MU Обзор
An 8-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals on a single chip, executing one instruction per cycle on 8-bit data words. Within the embedded systems hierarchy, the megaAVR 0-series sits in the general-purpose MCU family under Microchip's AVR portfolio, positioned for cost-sensitive, moderate-complexity control tasks.
Key features include the AVR Core Independent Peripherals (CIPs), which allow peripherals such as PWM timers, the RTC, and Configurable Custom Logic (CCL) to operate without CPU intervention. The device integrates four USARTs, SPI, and TWI (I2C) interfaces per the distributor-verified specification, plus a 12-bit ADC and analog comparators for mixed-signal sensing. Operating voltage spans the classic AVR 1.8V to 5.5V range, supporting direct connection to 3.3V and 5V systems.
Architecturally, the ATmega3209 executes most instructions in a single clock cycle, and the hardware multiplier accelerates math-intensive firmware. The event system routes peripheral signals internally, reducing latency and interrupt load. Single-pin Unified Program and Debug Interface (UPDI) simplifies programming with a single-wire connection.
Typical applications include industrial control, home appliances, IoT sensor nodes, and motor control or power-tool end points where a 5V-tolerant 8-bit MCU simplifies design.
A key design consideration is clock selection: at 20 MHz the device delivers peak throughput, but calibrating the internal oscillator or using an external crystal affects UART baud accuracy in multi-USART designs.
This page synthesizes verified distributor data, drop-in same-family alternatives, and practical design guidance not found in a single datasheet excerpt.
Аналоги без доработки для ATMEGA3209-MU — 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 ATMEGA3209-MU (тот же форм-фактор и посадочное место) — отличается по Core Processor, Package, Functional Safety Support, Peripherals, Series.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
ATMEGA4809-MU
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
ATMEGA1609-MU
✅ Прямая замена✓ В наличии
$0.89 / шт.
Открыть даташит →ATMEGA809-MU
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
ATMEGA3208-MU
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
ATMEGA3209-MU Максимальные параметры и электрические характеристики
| Core Processor | AVR (8-bit RISC with hardware multiplier) |
| Core Size | 8-Bit |
| Максимальная тактовая частота | 20 MHz |
| Flash Memory | 32 KB (16K x 16) |
| SRAM | 4 KB |
| EEPROM | 256 bytes |
| USART Interfaces | 4 |
| SPI Interface | Yes |
| I2C (TWI) Interface | Yes |
| Корпус | 48-QFN (7x7 mm) |
| Тип монтажа | Surface Mount |
| Series | megaAVR 0-series |
| Functional Safety Support | FuSa (per DigiKey listing) |
| Programming Interface | UPDI (single-wire) |
Руководство по цоколевке ATMEGA3209-MU в корпусе 48-qfn (7x7 mm)
Цоколевка для ATMEGA3209-MU (корпус 48-qfn (7x7 mm)). 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 ATMEGA3209-MU.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
ATMEGA3209-MU подходит для 6 применениеs: Industrial Control and Automation, Home Appliances, IoT Sensor Nodes, Motor Control and Power Tools, Consumer Electronics and HID, Lighting Control.
Industrial Control and Automation
The ATMEGA3209-MU fits industrial control nodes where deterministic 8-bit performance, multi-channel communication, and Functional Safety support are required. Its four USARTs allow a single MCU to bridge an RS-485/Modbus fieldbus, a local HMI link, and a debug channel simultaneously, while Core Independent Peripherals generate PWM and timestamp inputs without CPU intervention, keeping control loops jitter-free at 20 MHz. The 32 KB Flash accommodates protocol stacks and parameter tables, and the DigiKey listing confirms FuSa support for safety-relevant machinery. Deployed between a power stage and a fieldbus transceiver, the MCU offers 5V-tolerant I/O that simplifies interfacing with legacy industrial logic levels; the trade-off versus a 32-bit MCU is lower math throughput, acceptable for PID-class loops.
Рекомендуется
Home Appliances
Home appliance control boards - washers, cooktops, dishwashers - are a natural fit for the ATMEGA3209-MU. The 20 MHz AVR core with hardware multiplier handles temperature compensation and encoder decoding, while the 12-bit-class analog peripherals monitor NTC thermistors and current shunts. The 48-QFN (7x7 mm) footprint provides enough GPIO for relays, triac drives, LEDs, and a seven-segment or LCD display without an expander. The 256-byte EEPROM retains cycle counters and user settings across power cycles. Because appliance boards run at 5V and demand low BOM cost, the ATmega3209's single-chip integration of four USARTs, SPI, TWI, timers, and CCL logic eliminates glue chips. Its Core Independent Peripherals keep button scanning and PWM outputs running even during EEPROM writes or long interrupt service routines.
Рекомендуется
IoT Sensor Nodes
For battery-backed IoT sensor nodes, the ATMEGA3209-MU combines a megaAVR 0-series low-power architecture with enough 32 KB Flash to hold sensor drivers and a communication stack. The device sleeps at microamp-class currents between wakeups and can be woken by the RTC, pin-change, or the event system, letting a node sample a sensor every few seconds and average years of service from primary cells. The four USARTs, SPI, and TWI interfaces connect radio modules such as LoRa or Wi-Fi brigades, while the CCL can gate clocks to peripherals autonomously. Compared with a 32-bit MCU, the 8-bit core at 20 MHz draws less active current for simple acquisition tasks; the trade-off is slower encryption throughput, so lightweight ciphers or a crypto companion chip are recommended.
Рекомендуется
Motor Control and Power Tools
The ATMEGA3209-MU serves brushed-DC and light BLDC motor control in power tools and small appliances. Core Independent Peripherals in the megaAVR 0-series can route a timer output through the CCL to implement dead-time insertion and fault shutdown without firmware latency, and the hardware multiplier supports FOC-style arithmetic for commutation. The 20 MHz clock and event system give deterministic PWM updates, while the analog comparators provide cycle-by-cycle current limiting paths that operate even if the CPU stalls. The 48-pin QFN offers enough PWM channels and GPIO for a three-phase bridge, a user trigger, LED indicators, and a UART diagnostic link. Designers should place the MCU on the logic side of the gate driver and verify ADC sampling synchronizes to PWM edges for accurate current measurement.
Рекомендуется
Consumer Electronics and HID
Consumer products - keyboards, remote controls, toys, and small displays - benefit from the ATMEGA3209-MU's single-chip integration and 5V tolerance. The 32 KB Flash is ample for USB-bridge firmware or proprietary protocol handlers, and the 4 KB SRAM comfortably hosts display frame buffers for small OLED or segment LCD panels driven via SPI or TWI. The device's low unit cost at reel quantities and 48-QFN 7x7 mm body fit cost-optimized, space-constrained boards. Core Independent Peripherals maintain LED PWM dimming and button debouncing in hardware while the CPU sleeps, extending battery life in remote-control form factors. Community support through the MegaCoreX Arduino package accelerates prototyping. The main design consideration is ESD hardening on externally accessible connectors, which should use TVS diodes on all touchable I/O lines.
Рекомендуется
Lighting Control
Smart lighting ballasts, LED drivers, and DALI-type fixtures use the ATMEGA3209-MU for multi-channel dimming and communication. Core Independent Peripheral timers generate phase-correct PWM on several channels with hardware fault gating through the CCL, ensuring flicker-free dimming at 20 MHz resolution. The 32 KB Flash holds dimming curves, fading algorithms, and a UART/I2C command interpreter; the four USARTs allow one port for a DALI or DMX front end and another for factory test. The 256-byte EEPROM stores address and trim settings through power cycles. The part's 5V I/O drives MOSFET gate drivers directly, and its 12-bit-class ADC reads current and temperature for derating. Consider thermally isolating the MCU zone from the LED power section on the PCB to protect long-term reliability.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для ATMEGA3209-MU — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | ATMEGA4809-MU | ATMEGA1609-MU | ATMEGA809-MU | ATMEGA3208-MU |
|---|---|---|---|---|---|
| Package | 48-QFN (7x7) | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - verify pin map |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB (16K x 16) | 48 KB (24K x 16) | 16 KB (8K x 16) | 8 KB (4K x 16) | 32 KB (16K x 16) |
| SRAM | 4 KB | 6 KB | 2 KB | 1 KB | 4 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Core | AVR 8-bit with hardware multiplier | AVR 8-bit with hardware multiplier | AVR 8-bit with hardware multiplier | AVR 8-bit with hardware multiplier | AVR 8-bit with hardware multiplier |
Ключевые отличия
- Cost-optimized mid-size Flash within the megaAVR 0-series (против ATMEGA4809-MU)
- Sufficient memory headroom for protocol stacks (против ATMEGA1609-MU)
- Functional Safety (FuSa) support noted in distribution (против ATMEGA809-MU)
Заметки по проектированию
Decouple each VDD pin of the 48-QFN (7x7) package with a 100 nF ceramic capacitor placed within 2 mm of the pin, plus one bulk 4.7-10 uF capacitor near the supply entry. The megaAVR 0-series datasheet recommends a solid ground return under the QFN exposed pad; connect the thermal pad to a grounded via array for both heat spreading and ground integrity. Estimated: with typical active current in the low-mA class at 20 MHz and 5V, power dissipation remains well under 50 mW, so no heatsinking consideration is needed.
Configure the UPDI pin before locking it to GPIO use - repurposing PF7 as a general I/O in fuses can permanently lock you out of reprogramming the device unless a high-voltage UPDI recovery is available. Also, when using multiple of the four USARTs with the internal oscillator, calibrate or verify baud error; the internal oscillator accuracy may exceed the tolerance budget for fast baud rates, so use an external crystal for links above 115200 baud. Do not switch VDD rails faster than the datasheet slew-rate guidance during brownout tests.
Route the four USART and SPI buses away from the crystal and analog ADC traces; the event system allows peripherals to work without long routed signals, so keep external routing short. Use a continuous ground plane on layer 2 of a 4-layer board or a hatched ground on 2-layer boards. Keep 100 nF decouplers on the same layer as the IC when possible to avoid via inductance in the decoupling path. Reserve test pads for UPDI, VDD, and GND to allow in-circuit reprogramming during production.
Информация о соответствии
Compliance data not present in the provided web data; verify on Microchip's official product page environmental documents.
