ATMEGA3208-MF - 8-bit AVR MCU 20MHz 32KB Flash VQFN-32 | Microchip
料号： ATMEGA3208-MF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.46 | $14.60 |
| 25 | $1.38 | $34.50 |
| 100 | $1.21 | $121.00 |
| 1,000 | $0.98 | $980.00 |
ATMEGA3208-MF 概述
An 8-bit microcontroller (MCU) is an integrated circuit that contains a processor core, memory, and programmable input/output peripherals on a single chip, sitting within the broader hierarchy of semiconductor devices: AVR core -> 8-bit MCU -> microcontroller unit -> embedded processor. The megaAVR 0-series is Microchip's core-independent peripheral generation of the classic AVR architecture, using the latest AVR CPU with a two-stage pipeline and single-cycle I/O access.
Key features include the 20 MHz maximum clock frequency with an internal oscillator option, 32 KB in-system self-programmable Flash memory, 4 KB of SRAM for data and stack, 256 bytes of EEPROM for non-volatile parameter storage, and Functional Safety (FuSa) support as noted in distributor listings. The device integrates peripherals typical of the megaAVR 0-series, including multi-channel timers, USARTs, SPI, TWI (I2C), an ADC, analog comparators, and configurable custom logic cells.
Technically, the AVR core executes most instructions in a single clock cycle and includes a hardware multiplier, delivering efficient MIPS-per-MHz performance. Memory is organized in a unified address space with single-cycle SRAM access, and the peripheral set operates independently of the core clock where supported, reducing CPU overhead in real-time designs.
Typical applications include industrial control and automation, consumer appliances, IoT sensor nodes, and motor control or power-management boards where a compact 5x5 mm QFN footprint and moderate Flash density are required.
A key design consideration is the single-supply operating range and the use of the UPDI (Unified Program and Debug Interface) single-pin programming interface, which simplifies in-circuit programming but requires a compatible programmer such as the PICkit 4 or Atmel-ICE.
This page synthesizes distributor pricing, drop-in alternatives within the megaAVR 0-series, and practical design notes not consolidated in the manufacturer datasheet. Pricing data referenced as of 2026-09-17.
直接替换替代料： ATMEGA3208-MF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATMEGA3208-MF （相同外形与封装尺寸） ——差异在于 Core Processor, Programming Interface, Flash Memory, SRAM, Package.
快速对比工具——选择替代料号进行并排对比：
ATMEGA4808-MF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.7 / 个
查看数据手册 →ATMEGA1608-MF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.94 / 个
查看数据手册 →ATMEGA808-MF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.95 / 个
查看数据手册 →ATMEGA3208-MF 最大额定值与电气特性
| Core Processor | AVR (8-bit, with hardware multiplier) |
| Core Size | 8-bit |
| Series | megaAVR 0-series |
| 最大时钟频率 | 20 MHz |
| Flash Memory Size | 32 KB (16K x 16) |
| SRAM Size | 4 KB |
| EEPROM Size | 256 bytes |
| 封装 | 32-VQFN (5x5 mm) |
| 安装类型 | Surface Mount |
| Programming Interface | UPDI (Unified Program and Debug Interface) |
| Functional Safety | FuSa supported (per distributor listing) |
| 引脚数量 | 32 |
ATMEGA3208-MF 32-vqfn (5x5 mm) 引脚配置指南
ATMEGA3208-MF（32-vqfn (5x5 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： ATMEGA3208-MF.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ATMEGA3208-MF 适用于 6 应用s: Industrial Control and Automation, IoT Sensor Nodes, Consumer Appliances, Motor Control and Fan Drivers, Power Management and Battery Chargers, HMI and Display Control.
Industrial Control and Automation
The ATMEGA3208-MF fits industrial control nodes that need deterministic 8-bit control with adequate code space: its 20 MHz AVR core with hardware multiplier executes single-cycle instructions, while 32 KB Flash and 4 KB SRAM comfortably host Modbus/USART communication stacks, PID control loops, and state machines. Distributor listings flag Functional Safety (FuSa) support, relevant for safety-adjacent machinery logic. In typical use, the MCU reads sensors via its ADC, drives relays or PWM outputs through timers, and reports over RS-485 via a USART plus external transceiver; EEPROM retains calibration data across power cycles.
推荐
IoT Sensor Nodes
For battery-powered IoT sensor nodes, the ATMEGA3208-MF offers a compact 5x5 mm VQFN footprint, 8-bit AVR efficiency at 20 MHz, and 256 bytes of EEPROM for storing device IDs and calibration constants without external NVM. The 32 KB Flash accommodates a wireless protocol stack or bootloader alongside application code, and the 4 KB SRAM supports packet buffering. The megaAVR 0-series peripheral set - including low-power sleep modes, ADC, and configurable timers - allows periodic sampling and radio transmission duty-cycling, while the UPDI single-wire interface simplifies field programming through a minimal three-pad footprint on the PCB.
推荐
Consumer Appliances
Consumer appliances - washing machines, coffee makers, small HVAC units - are a classic fit for the ATMEGA3208-MF. The 20 MHz AVR core with hardware multiplier handles user-interface scanning, encoder decoding, and simple control algorithms, while 32 KB Flash leaves room for localized UI strings, hysteresis tables, and bootloader code. The ADC reads thermistors and user potentiometers, timers generate buzzer tones and PWM for motor or heater control, and the EEPROM preserves user settings after power loss. The 32-pin VQFN 5x5 mm package suits cost-driven, space-limited main PCBs, and the megaAVR 0-series roadmap protects long-term sourcing.
推荐
Motor Control and Fan Drivers
The ATMEGA3208-MF supports small BLDC, brushed-DC, and stepper motor control: its hardware multiplier accelerates commutation math and PI current-loop calculations at 20 MHz, and multiple 16-bit timers generate complementary PWM with dead-time control. The 32 KB Flash hosts sensorless start-up routines and fault tables, while 4 KB SRAM buffers telemetry. Combined with a gate driver or integrated motor driver, the MCU forms a complete compact drive; the ADC samples shunt current and BEMF, and comparators support over-current protection. EEPROM stores motor parameter sets enabling one PCB to serve multiple motor variants via firmware selection.
推荐
Power Management and Battery Chargers
In power-management boards and smart chargers, the ATMEGA3208-MF provides the control intelligence: the ADC monitors battery voltage, current, and temperature via resistor dividers and shunts, while PWM outputs drive buck or buck-boost converter stages through gate drivers. The 20 MHz core executes constant-current/constant-voltage charging state machines and MPPT-style algorithms with the hardware multiplier, and 32 KB Flash retains space for Li-ion safety routines, LED UI logic, and a bootloader. The 256-byte EEPROM stores charge-cycle counters and protection thresholds, and FuSa support in the series assists chargers targeting safety-conscious applications.
推荐
HMI and Display Control
The ATMEGA3208-MF works well as a human-machine-interface controller: 32 KB Flash accommodates segment-LCD lookup tables, multi-language strings, and touch-debouncing logic, while the TWI (I2C) and SPI peripherals drive character LCDs, OLED modules, or port expanders. The 20 MHz single-cycle core scans keypads and rotary encoders with microsecond latency, timers generate backlight PWM with smooth dimming, and the ADC reads analog sliders. The 4 KB SRAM supports small frame buffers for dot-matrix displays, and the compact 5x5 mm VQFN fits behind front panels. EEPROM persists user preferences and brightness settings across power cycles.
推荐
推荐产品汇总
工程参考数据： ATMEGA3208-MF ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATMEGA4808-MF | ATMEGA1608-MF | ATMEGA808-MF |
|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB (16K x 16) | 48 KB | 16 KB | 8 KB |
| SRAM | 4 KB | 6 KB | 2 KB | 1 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 128 bytes |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Core | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier | 8-bit AVR with hardware multiplier |
关键差异点
- Balanced 32 KB Flash density （对比 ATMEGA1608-MF)
- Cost-optimized vs largest family member （对比 ATMEGA4808-MF)
- Functional Safety (FuSa) support （对比 ATMEGA808-MF)
设计说明
The 32-pin VQFN (5x5 mm) has a 0.5 mm pin pitch and an exposed thermal pad on the underside. Connect the exposed pad to a grounded copper pour with an array of thermal vias - this improves heat dissipation and provides a solid ground reference for the ADC. The fine pitch requires solder-mask-defined or NSMD pads per the Microchip datasheet package drawing; verify your fab's capability for 0.5 mm pitch QFN assembly and consider peak reflow profiling for the MSL rating of the specific lot.
Decouple each VDD pin with 100 nF ceramic capacitors placed within 2 mm of the pins, plus one bulk 4.7-10 uF capacitor near the device. The megaAVR 0-series datasheet recommends keeping the VDD/GND loop small to minimize supply noise seen by the internal regulator and ADC reference. Estimated: at 20 MHz with typical activity, core current is in the low-mA range, so IR drop is minor - trace width for signal integrity and decoupling placement matter more than heavy power copper.
The UPDI programming pin (PA0) is shared with general I/O - do not design a circuit that clamps or loads PA0 heavily, or in-system programming will fail. Reserve a 3-pad footprint (UPDI, VDD, GND) for programming. Note also that the ATMEGA3208 (28/32-pin) and ATMEGA3209 (40/48-pin) are different pin-count parts: substituting a 3209 for a 3208 is NOT footprint compatible, while same-footprint flash-size variants (4808/1608/808 in 32-VQFN) are.
合规信息
Compliance statuses were not stated in the provided Verified Web Data; consult the Microchip product page or datasheet DS40002174C environmental documentation for RoHS/REACH confirmation.
