ATMEGA3208-XF - 20MHz 8-bit AVR MCU 32KB Flash | Microchip
部品番号: ATMEGA3208-XF ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.86 | $1.86 |
| 10 | $1.68 | $16.80 |
| 100 | $1.48 | $148.00 |
| 500 | $1.32 | $660.00 |
| 1,000 | $1.19 | $1,190.00 |
ATMEGA3208-XF 概要
An 8-bit AVR microcontroller is a single-chip computer that executes RISC instructions from on-chip Flash memory while integrating SRAM, EEPROM, and peripheral functions such as timers, USARTs, and analog-to-digital converters. Within the system hierarchy, it belongs to the megaAVR 0 series family, the AVR MCU product line, and the broader microcontroller and embedded processor category used across consumer, industrial, and automotive-adjacent designs.
Key features of the ATMEGA3208-XF include the 20 MHz AVR core with a single-cycle hardware multiplier for efficient math-intensive tasks, 32 KB (16K x 16) of self-programmable Flash for field firmware updates, and a rich peripheral set typical of the megaAVR 0 series, including multiple 16-bit timers, USARTs, and a 10-bit ADC. The Functional Safety (FuSa) qualification noted by distributors makes it suitable for safety-conscious system architectures.
The megaAVR 0 series architecture uses the latest AVR core with a two-stage pipeline, executing most instructions in a single clock cycle to deliver up to 20 MIPS at 20 MHz. The unified address space and C-friendly memory model simplify firmware development, while MegaCoreX provides Arduino IDE support for rapid prototyping on the ATmega3208 and its family members (ATmega4808, ATmega1608, ATmega808).
Typical applications include industrial control and automation nodes, consumer appliance controllers, and embedded sensing systems where 32 KB of code space and 4 KB of RAM are sufficient. The 28-pin package balances I/O count against board area for cost-sensitive designs.
When designing with this MCU, reserve the UPDI pin for single-wire programming and debugging, and verify the 28-SSOP footprint against your PCB land pattern before committing to the layout, since pin-compatible family members must share the same footprint for reuse.
This page synthesizes distributor pricing context, drop-in family alternatives, application guidance, and design notes not consolidated in the manufacturer datasheet, giving engineers a single decision-ready reference.
ドロップイン代替品: ATMEGA3208-XF — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ATMEGA3208-XF （同一形状・フットプリント） — 相違点: SRAM, Series, Core Processor, Flash Memory, EEPROM.
クイック比較ツール — 並列比較する代替部品を選択:
ATMEGA4808-XF
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
価格はお問い合わせください
データシートを見る →ATMEGA1608-XFR
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.66 / 個
データシートを見る →ATMEGA808-XF
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$0.72 / 個
データシートを見る →ATMEGA3208-XF 最大定格＆電気的特性
| Core Processor | AVR (megaAVR 0 series), 8-bit |
| Core Size | 8-bit |
| Speed | 20 MHz |
| Flash Memory | 32 KB (16K x 16) |
| SRAM | 4 KB |
| EEPROM | 256 bytes |
| パッケージ | 28-SSOP |
| 実装タイプ | Surface Mount |
| Series | megaAVR 0, Functional Safety (FuSa) |
| Programmer / Debugger | UPDI (Unified Program and Debug Interface) |
| Supplier Device Package | 28-SSOP |
ATMEGA3208-XF 28-ssop ピン配置ガイド
ATMEGA3208-XF (28-ssop パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: ATMEGA3208-XF.
詳細は データシート をご参照ください。
主な用途
ATMEGA3208-XF の用途: 6 件s: Industrial Control and Automation, Consumer Appliance Controllers, Embedded Sensing and IoT Nodes, Arduino and Maker Prototyping, Motor Control and Power Conversion Auxiliary Systems, Safety-Conscious Embedded Systems (FuSa).
Industrial Control and Automation
The ATMEGA3208-XF fits industrial control nodes where deterministic 8-bit control, 20 MHz execution, and 32 KB of self-programmable Flash are sufficient for the application logic. Its hardware multiplier accelerates PID loop math, and 4 KB of SRAM supports moderate buffering for Modbus or sensor aggregation tasks. Used as a PLC I/O module controller or motor-control sequencer, the megaAVR 0 series peripheral set - multiple 16-bit timers, USARTs, and a 10-bit ADC - replaces several discrete components, lowering BOM cost. Unlike larger 32-bit MCUs, the AVR architecture executes most instructions in one cycle, giving predictable timing for safety-adjacent logic, consistent with the FuSa classification distributors assign to this series. Field firmware updates leverage the self-programmable Flash, and the 28-SSOP package suits cost-driven industrial PCBs.
おすすめ
Consumer Appliance Controllers
Home appliance control boards - washers, coffee machines, fans, and small HVAC units - are a classic fit for the ATMEGA3208-XF. The 32 KB Flash holds UI state machines, menu text, and control algorithms, while the 256-byte EEPROM stores user settings and calibration data across power cycles. At 20 MHz with a single-cycle AVR core, button scanning, display multiplexing, and triac/timer control run comfortably with headroom. The 28-SSOP surface-mount package keeps PCB area small for cost-sensitive consumer boards, and the megaAVR 0 series' wide portfolio lets manufacturers scale the same PCB from ATmega808 (8 KB) to ATmega4808 (48 KB) footprints without redesign, protecting against supply or memory-size changes during the product lifecycle.
おすすめ
Embedded Sensing and IoT Nodes
Battery-powered and line-powered sensing nodes benefit from the ATMEGA3208-XF's balanced memory configuration: 32 KB Flash accommodates a communication stack plus sensor-fusion code, and 4 KB SRAM buffers radio payloads or logging data. The 10-bit ADC digitizes analog sensors directly, and multiple USARTs connect external radios or RS-485 transceivers. The AVR core's low deterministic interrupt latency suits periodic sampling loops, and the hardware multiplier speeds filtering math without a DSP. Compared with an 8-bit part with 1 KB SRAM such as the ATmega808, the 3208 avoids memory exhaustion when adding TLS-adjacent preprocessing or ring buffers. Prototyping is fast thanks to MegaCoreX Arduino IDE support, and the same firmware scales across the megaAVR 0 family.
おすすめ
Arduino and Maker Prototyping
The ATmega3208 is directly supported by the MegaCoreX Arduino hardware package, which covers ATmega4809/4808/3209/3208/1609/1608/809/808, making the ATMEGA3208-XF an excellent target for custom maker boards and educational kits. Makers can prototype on the ATmega4809-based Arduino Uno WiFi Rev 2, then deploy the same sketch to the ATmega3208 in a custom 28-SSOP PCB, since the megaAVR 0 series shares registers and peripherals across the family. The 20 MHz core with hardware multiplier handles servo timing, WS2812 LED driving, and serial protocols that stress slower 8-bit parts. Programming uses UPDI via a low-cost serial adapter, eliminating the need for an external crystal in many designs thanks to the internal oscillator options.
おすすめ
Motor Control and Power Conversion Auxiliary Systems
Small motor applications - fans, pumps, dampers, and latching solenoid drivers - use the ATMEGA3208-XF as the supervisory controller generating PWM and handling feedback. The 20 MHz AVR core produces high-resolution PWM from 16-bit timers, and the hardware multiplier executes two-cycle multiply for control-loop gain computations. The 10-bit ADC reads current-sense amplifiers and NTC thermistors for closed-loop protection. With 32 KB Flash, the firmware can include fieldbus command handling alongside the motor loop. The megaAVR 0 series' Functional Safety (FuSa) classification noted by distributors supports use in systems with safety-adjacent supervision. Compared with application-specific motor MCUs, the ATmega3208 offers lower cost and generic I/O for co-located housekeeping functions on the same die.
おすすめ
Safety-Conscious Embedded Systems (FuSa)
DigiKey classifies the ATMEGA3208-XF within the megaAVR 0 series, Functional Safety (FuSa) group, reflecting Microchip's safety-oriented documentation and development support for this family. In systems implementing safety functions - interlocks, monitoring channels, and diagnostic supervision - the deterministic single-cycle AVR core simplifies timing analysis, and the 32 KB self-programmable Flash supports CRC-protected firmware with safe in-field updates. The 256-byte EEPROM retains fault logs and service counters across power cycles, while 4 KB SRAM handles redundant-channel data. Architects should pair the MCU with external watchdog and voltage-monitor components and follow Microchip's safety collateral for the megaAVR 0 series. The 28-SSOP package suits compact safety I/O boards in industrial and medical-adjacent equipment.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ATMEGA3208-XF — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ATMEGA4808-XF | ATMEGA1608-XF | ATMEGA808-XF |
|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Speed | AVR 8-bit, 20 MHz | AVR 8-bit, 20 MHz | AVR 8-bit, 20 MHz | AVR 8-bit, 20 MHz |
| 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 | 256 bytes |
| Programming Interface | UPDI | UPDI | UPDI | UPDI |
| Safety Classification | megaAVR 0, Functional Safety (FuSa) | megaAVR 0, FuSa | megaAVR 0, FuSa | megaAVR 0, FuSa |
主な差別化要因
- 32 KB Flash sweet spot in the megaAVR 0 family （vs ATMEGA1608-XF)
- Lower cost than the memory-upgrade option （vs ATMEGA4808-XF)
- FuSa-classified series with modern AVR core （vs ATMEGA808-XF)
設計ノート
Reserve the UPDI pin for programming and debugging. On the megaAVR 0 series, UPDI shares a pin with a GPIO, and permanently configuring it as an output can lock you out of the device. Enable a fuse-based recovery window or design your firmware to never reconfigure the UPDI pin. Use Microchip SNAP, PICkit 4, or Atmel-ICE tools, or a serial-to-UPDI bridge for low-cost programming. Verify lock-bit settings before mass production, since clearing them requires a chip erase.
Decouple VDD with a 100 nF ceramic capacitor placed within a few millimeters of the supply pin, plus a bulk 4.7 uF to 10 uF capacitor near the board power entry. The 28-SSOP lead pitch of 0.65 mm requires careful solder-paste stencil design; use a 1:1 aperture with rounded corners to avoid bridging. The exposed-pin SSOP family reflows reliably at standard lead-free profiles (peak around 245 C per your assembly spec). Keep the UPDI trace accessible via a test point for field reprogramming.
Estimated: supply current depends on clock configuration - operating at 20 MHz from the internal oscillator draws measurably more current than low-frequency sleep operation, so consult the datasheet electrical-characteristics tables for exact figures at your supply voltage rather than relying on family averages. For battery designs, exploit the megaAVR 0 series sleep modes with the RTC running, and gate peripheral clocks via the peripheral clock gating registers. Confirm the exact supply voltage range for the -XF ordering code in the official datasheet before finalizing the power tree.
コンプライアンス情報
Compliance details must be confirmed from the Microchip product page or distributor compliance documents for the exact -XF ordering code. The megaAVR 0 series carries Functional Safety (FuSa) classification per DigiKey listing.
