ATMEGA808-MUR - 8-bit AVR MCU 20MHz 8KB Flash | Microchip
Артикул: ATMEGA808-MUR ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $0.52 | $0,52 |
| 10 | $0.47 | $4,70 |
| 100 | $0.42 | $42,00 |
| 500 | $0.39 | $195,00 |
| 1.000 | $0.372 | $372,00 |
ATMEGA808-MUR Обзор
A microcontroller (MCU) is a single-chip embedded computer integrating a processor core, program memory, data memory, and peripherals such as timers, communication interfaces, and analog-to-digital converters. Within the power-management hierarchy of embedded design, an 8-bit MCU like the ATmega808 sits at the low-to-mid complexity tier, ideal for deterministic, low-cost control tasks where a 32-bit ARM core would be unnecessary.
Key features include the AVR RISC processor executing most instructions in a single cycle for up to 20 MIPS at 20 MHz, 10-bit ADC capability (per LCSC product data), operation from -40C to +85C, and 5V operation characteristic of the megaAVR 0 series. The series uses Microchip's latest Core Independent Peripherals (CIPs), allowing hardware tasks such as PWM generation and communication to run without CPU intervention, reducing firmware complexity and improving real-time determinism.
Architecturally, the ATmega808/809/1608/1609 family shares the ATmega809 family datasheet (document DS40002172C), with Flash organized as 16-bit words since AVR instructions are 16 or 32 bits wide. On-chip In-System Programming (ISP) allows reprogramming without removal from the board. The event system interconnects peripherals directly, enabling autonomous signal routing between timers, ADC, and custom logic peripherals.
Typical applications include industrial automation control boards, home appliance and consumer electronics control, and motor control or lighting systems where 5V noise immunity and single-cycle I/O access are valuable. The 32-VQFN (5x5) exposed-pad package suits space-constrained, thermally demanding PCBs.
Design consideration: the 8 KB Flash and 1 KB SRAM budget firmware size carefully; use -O2 compilation and the tiny printf variants. The exposed pad should be soldered to a ground plane for thermal and EMC performance.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing verified as of 2026-09-18.
Аналоги без доработки для ATMEGA808-MUR — 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 ATMEGA808-MUR (тот же форм-фактор и посадочное место) — отличается по ADC Resolution, Package, Series, Core Processor, Flash Memory.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
ATMEGA4808-MUR
✅ Прямая замена✓ В наличии
$1.22 / шт.
Открыть даташит →ATMEGA1608-MUR
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
ATMEGA3208-MUR
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$1.24 / шт.
Открыть даташит →ATMEGA808-MUR Максимальные параметры и электрические характеристики
| Core | AVR 8-bit |
| Series | megaAVR 0, Functional Safety (FuSa) |
| Max Operating Frequency | 20 MHz |
| Flash Memory | 8 KB (8K x 8) |
| SRAM | 1 KB |
| EEPROM | 256 bytes |
| ADC Resolution | 10 bit |
| Рабочая температура | -40C to +85C |
| Корпус | 32-VQFN (5x5 mm) Exposed Pad |
| Тип монтажа | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Product Status | Active |
Руководство по цоколевке ATMEGA808-MUR в корпусе 32-vqfn (5x5 mm) exposed pad
Цоколевка для ATMEGA808-MUR (корпус 32-vqfn (5x5 mm) 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 ATMEGA808-MUR.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
ATMEGA808-MUR подходит для 6 применениеs: Industrial Automation Control, Home Appliance Control, Motor Control and Lighting, IoT Sensor Nodes, Consumer Electronics Subsystems, Functional Safety Applications.
Industrial Automation Control
The ATMEGA808-MUR fits industrial control nodes thanks to its -40C to +85C rating, 5V noise-immune I/O, and Core Independent Peripherals that run PWM, capture, and communication autonomously even if firmware stalls. In a PLC I/O module, the 20 MHz AVR core polls digital inputs and drives relay outputs with single-cycle port access, while the 10-bit ADC conditions 0-10V sensor channels via a divider. The 8 KB Flash accommodates Modbus RTU slaves and state machines; when logic grows, the pin-compatible ATMEGA1608/3208-MUR swap in without a respin. The FuSa family qualification supports functional-safety documentation needs in factory equipment.
Рекомендуется
Home Appliance Control
Appliance main boards need low cost, robust I/O, and reliable operation over line-voltage noise, all strengths of the ATMEGA808-MUR. Its 5V operation tolerates the transients typical of relay-switched compressors and motors, and the hardware multiplier accelerates PID loops for temperature regulation via the 10-bit ADC reading NTC sensors. At roughly $0.37 in volume (LCSC, as of 2026-09-18), the BOM cost suits high-volume appliances. The 256-byte EEPROM stores calibration and cycle counters across power cycles. The 32-VQFN 5x5 footprint fits compact control PCBs behind front panels.
Рекомендуется
Motor Control and Lighting
For fan, pump, and LED lighting control, the ATMEGA808-MUR generates multi-channel PWM through its Core Independent Peripherals without CPU loading, leaving the 20 MHz AVR core free for commutation and fault supervision. The 10-bit ADC samples current-sense shunts for overcurrent protection with sub-millisecond response when driven by the event system. Single-cycle GPIO enables precise triac phase-angle firing in dimming applications. The 8 KB Flash holds sensorless startup and protection routines; designs needing FOC should step up to the pin-compatible ATMEGA4808-MUR for code room.
Рекомендуется
IoT Sensor Nodes
Wired and low-power IoT endpoints benefit from the ATMEGA808-MUR's low standby modes and Core Independent Peripherals that can sample the ADC and accumulate results while the CPU sleeps, extending battery life in sensor nodes. The 10-bit ADC digitizes humidity, pressure, or current sensors, and USART or SPI links to external radio modules. The 1 KB SRAM supports lightweight MQTT or CoAP payloads with careful buffer management. The 32-VQFN exposed pad bonds to the ground plane, improving RF layout hygiene when placed near 2.4 GHz or sub-GHz modules.
Рекомендуется
Consumer Electronics Subsystems
In consumer products such as chargers, small displays, and remote controls, the ATMEGA808-MUR provides the right balance of cost and capability. At about $0.372 at volume (LCSC, as of 2026-09-18), it undercuts most 32-bit MCUs while offering hardware-multiplier math, 10-bit ADC for battery and temperature monitoring, and configurable I/O for buttons, LEDs, and buzzer drive. The 20 MHz clock gives ample headroom for debounce and UI state machines, and the 32-VQFN (5x5 mm) package suits space-limited handheld enclosures with standard SMT assembly.
Рекомендуется
Functional Safety Applications
The megaAVR 0 family, including the ATMEGA808-MUR, is qualified for functional safety (FuSa), making it appropriate for safety-related control functions in industrial and medical equipment under IEC 61508-style development flows. Engineers can leverage Microchip's FuSa design support packages for the family when building SIL-rated logic, watchdog supervision, and diagnostic self-tests. The Core Independent Peripherals implement hardware-based monitoring (WDT, RTC, CCL logic) that continues operating independently of the CPU, supporting safety mechanisms. Design teams should obtain the official safety manual from Microchip for certification evidence.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для ATMEGA808-MUR — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | ATMEGA4808-MUR | ATMEGA1608-MUR | ATMEGA3208-MUR |
|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) Exposed Pad | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Max Frequency | AVR 8-bit / 20 MHz | AVR 8-bit / 20 MHz | AVR 8-bit / 20 MHz | AVR 8-bit / 20 MHz |
| Flash Memory | 8 KB | 48 KB | 16 KB | 32 KB |
| SRAM | 1 KB | 6 KB | 2 KB | 4 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Ключевые отличия
- Lowest cost in same footprint (против ATMEGA4808-MUR)
- Functional safety qualification (против ATMEGA1608-MUR)
- Upgrade path within one PCB (против ATMEGA3208-MUR)
Заметки по проектированию
The 32-VQFN exposed pad must be soldered to a grounded thermal pad on the PCB. Define an array of thermal vias (typically 4-6, 0.3 mm diameter) under the pad to the ground plane to ensure reliable solder wetting and low-impedance grounding. Use 0.5 mm pitch QFN land patterns per standard stencil design, with solder paste coverage around 60-70% on the exposed pad to avoid voiding and component tombstoning during reflow.
Decouple each VDD pin with 100 nF ceramic capacitors placed within 2-3 mm of the pin, plus one bulk 4.7-10 uF capacitor near the supply entry. The megaAVR 0 series core operates from an internal regulator; keep the supply clean to preserve ADC accuracy on the 10-bit converter. Avoid routing switching-regulator traces under the device, and add a ferrite bead between noisy supply rails and the MCU VDD net in motor-control designs.
The 8 KB Flash fills quickly with floating-point libraries and protocol stacks; estimate code size early and reserve 20% headroom, or design the PCB for the pin-compatible ATMEGA1608/3208/4808-MUR from the start. Program via UPDI (single-wire) - older ISP programmers for classic AVRs do not work. Also, configure unused GPIO as inputs with pull-ups or outputs low rather than leaving floating, to reduce EMC susceptibility and quiescent leakage in battery designs.
Информация о соответствии
Verified web data did not include explicit compliance statements; obtain Material Declaration from Microchip product page for ATMEGA808.
