ATMEGA324PA-MN - 8-bit AVR MCU 32KB 20MHz QFN-44 | Microchip
部品番号: ATMEGA324PA-MN ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.33 | $4.33 |
| 10 | $3.98 | $39.80 |
| 100 | $3.65 | $365.00 |
| 500 | $3.35 | $1,675.00 |
| 1,000 | $3.05 | $3,050.00 |
ATMEGA324PA-MN 概要
Key differentiating specifications include the 131-instruction AVR RISC instruction set, 32 general-purpose working registers tightly coupled to the ALU, and the picoPower technology suite that keeps active and sleep currents low across the 1.8V to 5.5V supply range. The device integrates a rich peripheral set: an 8-channel 10-bit ADC, multiple timers with PWM, USI/USART serial interfaces, SPI, and two-wire interface (TWI/I2C). On-chip debug is available through the JTAG port, and code protection is provided by lock bits.
Performance is anchored by the single-cycle execution core; at 20 MHz the ATmega324PA delivers approximately 20 MIPS. The enhanced peripherals - including an 8/16-bit timer pair with output-compare PWM channels and a 10-bit successive-approximation ADC - allow the MCU to drive motor, lighting, and sensing tasks without external logic. The QFN-44 package with exposed thermal pad provides good thermal and electrical performance for compact industrial and automotive-adjacent designs rated to +105C.
Typical applications include industrial control panels, sensor nodes, consumer appliance user interfaces, motor control, and battery-powered instrumentation where low-power sleep modes and wide temperature operation matter. Designers should budget clock configuration carefully: full 20 MHz operation requires a 4.5V-5.5V supply, while lower voltages cap the maximum safe clock frequency. This page adds value beyond the datasheet by consolidating distributor pricing, drop-in same-package alternatives, comparison tables, and practical design notes in one structured reference.
ドロップイン代替品: ATMEGA324PA-MN — 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: ATMEGA324PA-MN （同一形状・フットプリント） — 相違点: Package, Flash Memory, General Purpose I/O, Instruction Set, Number of I/O.
クイック比較ツール — 並列比較する代替部品を選択:
ATMEGA324PA-MCHR
✅ ドロップイン✓ 在庫あり
$2.55 / 個
データシートを見る →ATMEGA324PA-MCH
✅ ドロップイン✓ 在庫あり
$2.45 / 個
データシートを見る →ATMEGA324P-20MQ
✅ ドロップイン✓ 在庫あり
$4.15 / 個
データシートを見る →ATMEGA324PA-MN 最大定格＆電気的特性
| Core Architecture | 8-bit AVR RISC |
| 最大クロック周波数 | 20 MHz |
| Flash Memory | 32 KB (16K x 16) ISP |
| EEPROM | 1 KB |
| SRAM | 2 KB |
| General Purpose I/O | 32 lines |
| Supply Voltage Range | 1.8 V to 5.5 V |
| 動作温度 | -40C to +105C |
| パッケージ | 44-VQFN (7x7 mm) Exposed Pad |
| 実装タイプ | Surface Mount |
| ADC Resolution | 10-bit |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Serial Interfaces | USART, SPI, TWI (I2C), USI |
| Low Power Technology | picoPower |
| RoHS ステータス | Compliant (Green per distributor data) |
| Max CPU Performance | Approx. 20 MIPS at 20 MHz |
ATMEGA324PA-MN 44-vqfn (7x7 mm) exposed pad ピン配置ガイド
ATMEGA324PA-MN (44-vqfn (7x7 mm) 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: ATMEGA324PA-MN.
詳細は データシート をご参照ください。
主な用途
ATMEGA324PA-MN の用途: 6 件s: Industrial Control and Automation, Battery-Powered Sensor Nodes, Consumer Appliance User Interfaces, Motor Control and PWM Drivers, Debug and Development Tooling, Lighting and Display Control.
Industrial Control and Automation
The ATMEGA324PA-MN fits industrial control panels and automation nodes because its -40C to +105C rating, 32 KB Flash, and 32 GPIO lines cover the temperature and I/O demands of factory-floor equipment. In a typical control node, the 10-bit ADC reads analog sensors while timers generate PWM for actuators, and the USART links to a master controller. Running at 20 MHz yields roughly 20 MIPS, sufficient for PID loops and protocol handling without an external co-processor. The QFN-44 exposed pad gives robust grounding against electrical noise common in industrial environments, and lock bits protect proprietary firmware on deployed units.
おすすめ
Battery-Powered Sensor Nodes
picoPower technology makes the ATMEGA324PA-MN well suited to battery-powered sensing: sleep modes shut down clocks and peripherals so the MCU spends most of its life in Power-down, waking on pin-change interrupt or watchdog timeout. Operating from 1.8V allows direct use of two alkaline cells or a single Li-SOCl2 cell without a boost converter, extending battery life and reducing BOM cost. The 10-bit ADC digitizes sensor outputs locally, and TWI/SPI interfaces connect digital sensors such as temperature, humidity, or pressure ICs. The 1 KB EEPROM stores calibration constants through power cycles, and 2 KB SRAM buffers data between radio or UART transmissions.
おすすめ
Consumer Appliance User Interfaces
Appliance front panels - washing machines, ovens, and HVAC thermostats - are a classic ATmega324-class application: the 32 GPIO lines drive seven-segment displays, LEDs, and read keypads, while the 20 MHz core handles debounce, display refresh, and menu logic concurrently. The -40C to +105C range accommodates heat near ovens and motor housings, exceeding the +85C limit of many consumer MCUs. USART and TWI communicate with power modules or main control boards, and the 1 KB EEPROM retains user settings after power loss. The compact 7x7 mm VQFN fits dense display PCBs where connector and display areas dominate board space.
おすすめ
Motor Control and PWM Drivers
The ATMEGA324PA-MN suits small motor control tasks: its 8-bit timers provide phase-correct and fast PWM outputs for DC and stepper motor drives, while the 16-bit timer offers precise control periods and input capture for encoder feedback. At 20 MIPS the core executes commutation and control-loop code with margin, and the 10-bit ADC samples current shunts or potentiometer position at regular intervals. Dead-time and protection logic are implemented in firmware with fast interrupt response. The +105C rating allows mounting near heat-generating drivers, and the exposed thermal pad helps conduct device heat into the PCB copper of compact drive boards.
おすすめ
Debug and Development Tooling
JTAG on-chip debug makes the ATMEGA324PA-MN convenient for development tooling, training boards, and test fixtures. Engineers can single-step code, watch registers, and set breakpoints through Atmel-ICE without consuming UART bandwidth, which is valuable when debugging protocol stacks or timing-critical loops. The 32 KB Flash supports read-while-write, so bootloader-based field updates on deployed instruments are straightforward. Educational and maker platforms frequently adopt this AVR class because the architecture is well documented, tools are free, and the 32-register file simplifies assembly-level teaching. The VQFN-44 package suits production test fixtures while TQFP siblings serve removable prototyping headers.
おすすめ
Lighting and Display Control
LED lighting controllers and display drivers benefit from the ATMEGA324PA-MN's PWM resources: multiple output-compare channels dim LED strings or drive backlight brightness with hardware-timed pulses, independent of software jitter. The 20 MHz clock allows fast multiplexing of LED matrix or seven-segment displays across the 32 I/O lines without external driver ICs in cost-sensitive products. The 10-bit ADC supports sensors for ambient-light adaptive dimming and over-temperature shutdown of luminaire electronics, leveraging the +105C rating. Sleep modes keep standby draw minimal in always-plugged products that must meet low no-load power targets.
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: ATMEGA324PA-MN — 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 | ATMEGA324PA-MCHR | ATMEGA324PA-MCH | ATMEGA324P-20MQ |
|---|---|---|---|---|
| Package | 44-VQFN (7x7 mm) | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same | 44-VQFN (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Low Power Technology | picoPower (PA die) | picoPower (PA die) | picoPower (PA die) | Standard ATmega324P (higher sleep current) |
主な差別化要因
- picoPower die lowers standby current （vs ATMEGA324P-20MQ)
- +105C operation exceeds typical consumer MCU limits （vs ATMEGA324PA-MCH)
- VQFN-44 saves board area versus TQFP （vs ATMEGA324PA-AU)
設計ノート
Observe the clock-versus-voltage speed curve: 20 MHz operation is only specified at the high end of the 1.8V-5.5V supply range (per Microchip ATmega324PA family documentation, approximately 4.5V and above for full speed). If your system runs at 3.3V, derate the maximum crystal frequency accordingly or accept the documented derating curve. Decouple each VCC pin with 100 nF ceramics placed within a few millimeters of the pin, plus one bulk 4.7-10 uF capacitor per supply rail, to keep ADC noise and reset immunity within datasheet limits.
The VQFN-44 (7x7 mm) exposed pad on the MN package should be soldered to a grounded copper area - even though the pad is primarily thermal/ground, a well-wetted pad improves grounding and heat dissipation. Use an array of thermal vias under the pad to internal ground planes. QFN leads are hidden beneath the body, so define the PCB land pattern per the Microchip package drawing and verify paste aperture design to avoid bridging on the 0.5 mm pitch leads. Inspect with X-ray or angled AOI rather than relying on visual lead inspection.
Fuse configuration is the most common source of ATmega field failures: wrong clock-source or clock-divider fuses can leave the device dead-seeming or running at 1/8 speed, and disabling the RESET pin as GPIO (RSTDISBL) bricks in-circuit programming. Always verify SPI programming remains possible before locking debug fuses. Also confirm ISP header wiring shares a common ground with the target, and avoid driving JTAG pins during programming if JTAGEN is enabled, as contention corrupts programming sessions.
コンプライアンス情報
Distributor data classifies ATMEGA324PA-MN as Green/RoHS compliant (FindIC: QFN, 105C, Green). AEC-Q100 qualification not stated in provided data; request Microchip qualification report for automotive programs.