ATMEGA32A-MUR - 16MHz 32KB Flash AVR MCU | Microchip
部品番号: ATMEGA32A-MUR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMEGA32A-MUR 概要
An 8-bit microcontroller is a compact embedded-processing device designed to execute firmware, monitor inputs, control outputs, and manage communication protocols without a separate host processor. The ATmega32A belongs to the AVR family and uses an enhanced RISC architecture, making it suitable for industrial control, instrumentation, communications, consumer products, and embedded automation systems. Its 32 KB Flash provides room for application code, while SRAM supports runtime variables and EEPROM preserves nonvolatile calibration or configuration data.
Key features include an 8-bit AVR RISC processor, 16 MHz maximum operating frequency, 32 KB Flash, 2 KB SRAM, 1 KB EEPROM, 32 I/O pins, and an eight-channel 10-bit analog-to-digital converter. The device also includes I2C, SPI, and USART communication interfaces, JTAG debug support, and programmable timers for periodic and event-driven control. These resources allow one device to combine sensing, logic, communications, and actuator control.
The ATmega32A-MUR is identified in the verified data as a 44-VQFN 7x7 mm package. The exposed-pad construction supports compact surface-mount layouts, while the device's 4.5 V to 5.5 V operating range makes it appropriate for conventional embedded systems. The 10-bit ADC is useful for analog measurement, but the verified data does not provide detailed conversion timing or accuracy figures, so those values should be taken from the manufacturer datasheet.
Typical applications include industrial controllers, sensor interfaces, data acquisition modules, motor and relay-control boards, communication equipment, and compact embedded products. In each case, the AVR core handles local control while the ADC measures analog conditions and the serial interfaces connect the system to sensors, actuators, or external controllers. Firmware should include appropriate startup, peripheral initialization, and application logic before the MCU is placed in production.
A key design consideration is matching the supply voltage, clock requirements, pin multiplexing, and exposed-pad layout to the PCB footprint. Designers should also account for decoupling, programming access, reset behavior, and unused-pin handling. Verify the exact package drawing and pin assignments against the Microchip datasheet before layout because the VQFN footprint and exposed thermal or electrical pad arrangement must be implemented correctly.
This page summarizes the verified distributor and manufacturer information for ATMEGA32A-MUR, including its core specifications, package, application fit, and sourcing links. Because the supplied data does not include complete pricing tiers, electrical limits, detailed pinout, lifecycle confirmation beyond the retrieved snippet, or verified drop-in equivalents, those fields are marked conservatively rather than inferred.
ドロップイン代替品: ATMEGA32A-MUR — 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: ATMEGA32A-MUR （同一形状・フットプリント） — 相違点: Package, SRAM, EEPROM, Program Memory Type, ADC.
クイック比較ツール — 並列比較する代替部品を選択:
ATMEGA32A-MU
✅ ドロップイン✓ 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 →ATMEGA32-16MU
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ATMEGA32U4-MU
✅ ドロップイン✓ 在庫あり
$3.9336 / 個
データシートを見る →ATMEGA8A-MU
✅ ドロップイン✓ 在庫あり
$0.7 / 個
データシートを見る →ATMEGA16A-MU
✅ ドロップイン✓ 在庫あり
$2.64 / 個
データシートを見る →ATMEGA32A-MUR 最大定格＆電気的特性
| Product Type | 8-bit AVR microcontroller |
| Architecture | AVR enhanced RISC |
| Maximum Clock Speed | 16 MHz |
| Flash Memory | 32 KB |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| 電源電圧 | 4.5 V to 5.5 V |
| I/O Ports | 32 |
| ADC | 8-channel, 10-bit |
| Communication Interfaces | I2C, SPI, UART/USART |
| Debug Interface | JTAG |
| パッケージ | 44-VQFN, 7x7 mm |
| Package Type | VQFN with exposed pad |
| 実装タイプ | Surface mount |
| Core | AVR 8-bit core |
| Program Memory Type | Self-programmable Flash |
| Instruction Set | 131 AVR instructions |
| ADC Resolution | 10 bit |
ATMEGA32A-MUR vqfn with exposed pad ピン配置ガイド
ATMEGA32A-MUR (vqfn with exposed pad 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: ATMEGA32A-MUR.
詳細は データシート をご参照ください。
主な用途
ATMEGA32A-MUR の用途: 6 件s: Industrial Sensor Controller, Data Acquisition Module, UART Communication Bridge, Relay and Actuator Control, Consumer Device Controller, Educational and Prototype Embedded Platform.
Industrial Sensor Controller
ATMEGA32A-MUR fits industrial sensor controllers that combine analog measurements with local logic and serial reporting. Its eight-channel 10-bit ADC can read sensor outputs, while 32 I/O ports support digital inputs, alarm signals, and actuator control. The 16 MHz AVR core provides deterministic control for sampling, filtering, threshold decisions, and communication. I2C, SPI, and UART/USART allow the controller to connect to sensors, memory, gateways, or service equipment. Use the 4.5 V to 5.5 V range with regulated supply and decoupling, and add protection, calibration, and isolation according to the installation environment.
おすすめ
Data Acquisition Module
ATMEGA32A-MUR is suitable for compact data-acquisition modules that gather multiple analog channels and transmit results to a host. The 10-bit ADC supports basic process or instrumentation measurements, while the 32 KB Flash provides room for sampling routines, calibration tables, and communication code. The 2 KB SRAM supports temporary data handling, and UART/USART, SPI, or I2C can connect to a sensor front end, display, storage device, or host computer. Because the verified data does not specify ADC timing or accuracy limits, design the sampling interval and signal conditioning from the complete Microchip datasheet.
おすすめ
UART Communication Bridge
ATMEGA32A-MUR can serve as a compact UART, SPI, or I2C bridge between embedded sensors and a higher-level controller. The 16 MHz AVR core can frame messages, validate commands, translate protocols, and report status through the available I/O pins. Its 32 KB Flash and 2 KB SRAM provide useful code and buffer space for gateway firmware, while the three communication interfaces allow multiple external devices to be coordinated. The 44-VQFN package supports compact assemblies, although exposed-pad layout and assembly requirements must be followed exactly. Firmware should include timeout, checksum, and fault-recovery behavior for production reliability.
おすすめ
Relay and Actuator Control
ATMEGA32A-MUR can implement relay, solenoid, lamp, or general actuator control when paired with appropriate driver circuitry. Its 32 I/O ports allow digital control and status inputs, while timers and interrupts can provide deterministic switching sequences and debounce handling. The 4.5 V to 5.5 V operating range is compatible with common 5 V logic systems, but relay coils, motors, and inductive loads require transistor drivers, flyback protection, current limiting, and often isolation. Do not connect high-current loads directly to MCU I/O pins. Firmware should include startup states, watchdog handling, fault flags, and safe outputs for power-loss conditions.
おすすめ
Consumer Device Controller
ATMEGA32A-MUR is appropriate for compact consumer products that need local control, status LEDs, button inputs, analog sensing, and serial configuration. The 32 KB Flash and 2 KB SRAM can hold application firmware, user-interface state, and communication buffers, while the 10-bit ADC supports simple analog controls. The 44-VQFN package helps reduce board area in space-constrained products, while the 4.5 V to 5.5 V range simplifies common 5 V power architectures. For consumer products, verify electrostatic, environmental, lifecycle, and regulatory requirements separately because those details are not present in the verified source snippets.
おすすめ
Educational and Prototype Embedded Platform
ATMEGA32A-MUR works well as the central MCU for educational embedded-system prototypes because it combines a familiar AVR architecture, 32 KB Flash, 2 KB SRAM, EEPROM, timers, ADC, and serial interfaces in one device. Students can connect buttons, LEDs, sensors, displays, and serial adapters while learning interrupt handling, PWM, communication protocols, and embedded memory. The 44-VQFN footprint is compact but requires careful exposed-pad handling, so a development board or breakout may be preferable for initial prototyping. Verify the exact pinout and programming connector before wiring a custom board.
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: ATMEGA32A-MUR — 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 | ATMEGA32A-MU | ATMEGA32-16MU | ATMEGA32U4-MU | ATMEGA8A-MU | ATMEGA16A-MU |
|---|---|---|---|---|---|---|
| Package | 44-VQFN (7x7 mm) | 44-VQFN (7x7 mm), verify exact suffix details | 44-VQFN, verify exact package drawing | 44-VQFN, verify exact package drawing | 44-VQFN family candidate, verify exact pinout | 44-VQFN family candidate, verify exact pinout |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Processor Core | 8-bit AVR | AVR family, verify | AVR family, verify | AVR family with USB emphasis | 8-bit AVR | 8-bit AVR |
主な差別化要因
- 32 KB self-programmable Flash with 2 KB SRAM （vs ATMEGA8A-MU)
- Eight-channel 10-bit ADC integrated into the MCU （vs ATMEGA32U4-MU)
- Three named serial connectivity options （vs ATMEGA32-16MU)
- 44-VQFN 7x7 mm package for compact assemblies （vs ATMEGA32A-MU)
設計ノート
Use the exact Microchip 44-VQFN land pattern rather than a generic QFN footprint. Confirm the exposed-pad dimensions, pad numbering, solder-mask opening, and paste volume from the official package drawing. The ATMEGA32A-MUR is listed as a 44-VQFN 7x7 mm device, so a mismatch in pad geometry or numbering can prevent assembly or cause incorrect peripheral connections.
Design the power rail for the verified 4.5 V to 5.5 V supply range and place decoupling capacitors close to the appropriate supply and ground pins. The supplied data does not include capacitor values, ESR requirements, or detailed current limits, so those values must come from the complete Microchip datasheet and the selected board power budget. Keep analog and communication supply routing separate where measurement accuracy matters.
Do not assume that related ATmega32, ATmega16, ATmega8, or ATmega32U4 MPNs are drop-in replacements solely because they use a similar 44-pin package. Compare the exact pin names, alternate-function multiplexing, I/O counts, memory sizes, ADC channels, timers, programming signals, and exposed-pad requirements. The verified snippets identify candidates but do not provide a complete cross-reference certification.
Route high-current and switching-node connections away from ADC inputs, oscillator connections, reset circuitry, and communication lines. Keep external sensor inputs short, provide suitable protection for exposed connectors, and use a stable reference and ground strategy for analog measurements. The eight-channel 10-bit ADC is useful for basic acquisition, but signal conditioning and filtering remain application-specific.
Validate watchdog, reset, and brownout behavior in firmware before deploying the MCU in unattended equipment. Initialize outputs to safe states before enabling drivers, include communication timeouts, and provide fail-safe states for relays or actuators. Because the supplied data does not state watchdog, brownout, or absolute-maximum details, verify those functions against the complete manufacturer datasheet.
コンプライアンス情報
The supplied verified results identify the manufacturer, device family, package, and technical characteristics, but do not explicitly provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than inferred.
