ATMEGA328-PU - 8-Bit 20MHz 32KB Flash MCU | Microchip
MPN: ATMEGA328-PU ✓ نشطATMEGA328-PU نظرة عامة
A microcontroller is a programmable integrated circuit that combines a CPU core, memory, and peripherals into one embedded-control component. The ATMEGA328-PU belongs to the AVR family and uses an 8-bit architecture with single-cycle instruction execution, allowing useful control performance at modest clock rates. Its DIP-28 package makes it especially suitable for Arduino-style boards, prototyping systems, educational kits, and products assembled in conventional through-hole production.
Key features include 32 KB of flash memory, 2 KB of SRAM, 1 KB of EEPROM, 20 MHz maximum clock frequency, and 32 I/O ports according to the supplied distributor result. The device also provides integrated support for common embedded-control functions, including timers, serial communication, and programmable digital interfaces. Its 28-PDIP package supports straightforward socket assembly and through-hole PCB insertion.
The AVR architecture is suitable for deterministic control loops because many instructions execute in a single clock cycle. This helps software respond efficiently to inputs while timers and serial interfaces handle time-based or communication-related tasks. The 20 MHz operating point provides additional performance margin over lower-frequency 8-bit implementations, although the actual clock source, fuse settings, and power conditions must be confirmed in the manufacturer documentation.
Typical applications include Arduino-compatible controller boards, automation and industrial control modules, temperature and environmental monitoring, LED lighting systems, data loggers, hobby robotics, and battery-powered embedded products. The through-hole package is useful where technicians need socketed replacement or where automated assembly does not handle fine-pitch SMD components.
For a new design, verify the required clock, memory, serial interfaces, and analog functions against the manufacturer datasheet before transferring an existing board. A replacement must match the package, pinout, voltage requirements, and relevant memory characteristics; a functionally similar microcontroller is not automatically a drop-in replacement.
This page combines verified distributor information, package-specific selection guidance, and engineering-oriented application context. Pricing, stock, lifecycle status, and detailed electrical limits should be confirmed against current distributor and manufacturer records before committing to production.
بدائل مباشرة لـ ATMEGA328-PU — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ATMEGA328-PU (نفس عامل الشكل والبصمة) — يختلف في Package, Operating Temperature, EEPROM, Supply Voltage Range, Flash Memory.
ATMEGA328-AU
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA328-PU
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA328PB-PU
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ATMEGA168-20PU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA88PA-PU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA48PA-PU
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ATMEGA328-PU الحدود القصوى والخصائص الكهربائية
| Product Type | 8-bit AVR microcontroller |
| Maximum Clock Speed | 20 MHz |
| Flash Memory | 32 KB (16K x 16) |
| EEPROM Memory | 1 KB |
| SRAM | 2 KB |
| Architecture | AVR enhanced RISC |
| العلبة | 28-PDIP |
| Package Type | Through-hole DIP |
| I/O Ports | 32 I/O ports |
| جهد التغذية | 4.5 V to 5.5 V |
| Program Memory Type | In-system programmable flash |
| Programming | In-system programming |
| Instruction Execution | Single-clock-cycle execution for powerful instructions |
| نمط التركيب | Through-hole |
| Device Class | General-purpose 8-bit microcontroller |
دليل تكوين أطراف ATMEGA328-PU through-hole dip
تكوين الأطراف لـ ATMEGA328-PU (حزمة through-hole dip). تتضمن هذه الدائرة المتكاملة الرقمية GPIO وواجهات الاتصال (UART وSPI وI2C) وأطراف الطاقة. راجع ورقة بيانات الشركة المصنعة لوظائف الأطراف البديلة وخيارات التكوين. ضرورية لتصميم الأنظمة المدمجة وتخطيط PCB.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ ATMEGA328-PU.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
ATMEGA328-PU مناسب لـ 6 التطبيقs: Arduino-Compatible Controller Boards, Industrial Automation Control, Temperature and Environmental Monitoring, LED Lighting and Display Control, Battery-Powered Sensor Nodes, Programmable Logic and Relay Control.
Arduino-Compatible Controller Boards
The ATMEGA328-PU fits socketed Arduino-style controller boards that require a 28-pin through-hole AVR device and in-system programming. Its verified 32 KB flash, 2 KB SRAM, 1 KB EEPROM, and 20 MHz maximum clock provide a practical baseline for bootloaders, sensor handling, digital control, and serial interfaces. Install it only after confirming the board pinout, reset circuit, clock source, supply rails, and selected AVR core. A software image compiled for a different ATmega memory map or boot section may not transfer correctly.
موصى به
Industrial Automation Control
ATMEGA328-PU is suitable for small automation modules where deterministic 8-bit control, digital inputs, outputs, timers, and serial diagnostics are required. The verified 32 I/O ports and 20 MHz maximum clock provide resources for sensing and actuator coordination, while the 28-PDIP package supports conventional through-hole assembly. For industrial use, verify operating temperature, ESD requirements, isolation, grounding, supply tolerance, and enclosure temperature independently; those limits are not present in the supplied verified snippets.
موصى به
Temperature and Environmental Monitoring
The ATMEGA328-PU can serve as the control core for temperature, humidity, and environmental monitoring when the design uses supported digital or analog sensor interfaces. Its 32 KB flash allows application firmware, calibration logic, and communication code to coexist, while the 2 KB SRAM supports buffering and stack requirements. The supplied data does not list ADC resolution or sensor-specific timing, so sensor selection and analog accuracy must be checked against the manufacturer datasheet before finalizing the measurement path.
موصى به
LED Lighting and Display Control
ATMEGA328-PU can control LED lighting, indicators, and display sequences through its digital I/O and timer resources. The verified 32 I/O ports and 20 MHz maximum clock make it appropriate for multiple channels, status indicators, PWM-based dimming, and menu or animation logic when the external driver and current requirements are added appropriately. LED modules must include suitable transistor or constant-current drive; do not assume the microcontroller I/O can directly supply the full LED load.
موصى به
Battery-Powered Sensor Nodes
ATMEGA328-PU can be used in battery-powered sensor nodes when firmware uses low-power modes and the board avoids unnecessary always-on loads. The verified 8-bit architecture and 20 MHz maximum clock support responsive control without requiring a larger processor, while the DIP package favors prototypes and low-volume assemblies. Battery-life calculations require sleep current, active current, regulator quiescent current, and wake-up behavior; those values are not included in the supplied verified data and must be checked before making runtime claims.
موصى به
Programmable Logic and Relay Control
The ATMEGA328-PU is appropriate for small programmable controller boards that sequence relays, indicators, motors, or other discrete loads. Its 32 I/O ports and 8-bit AVR control model can represent simple state machines, debounced inputs, timing sequences, and safety interlocks. Relay contacts and inductive loads require driver transistors, flyback protection, isolation where required, and careful separation between high-current and low-level circuitry. The DIP package makes socketed serviceability attractive, but it does not remove the need for proper power and transient protection.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ATMEGA328-PU — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ATMEGA328-AU | ATMEGA328PB-PU | ATMEGA168-20PU | ATMEGA88PA-PU | ATMEGA48PA-PU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Architecture | AVR 8-bit | AVR family; exact variant unverified | AVR family; exact variant unverified | AVR family | AVR family | AVR family |
أبرز الفروقات
- Verified 32 KB flash capacity (مقابلATMEGA168-20PU)
- Verified 2 KB SRAM and 1 KB EEPROM (مقابلATMEGA88PA-PU)
- Through-hole 28-PDIP format (مقابلATMEGA328-AU)
ملاحظات التصميم
Reserve the exact 28-pin DIP footprint, socket or plated through-holes, decoupling locations, reset network, and programming access before committing the board layout. Because the verified data identifies a 28-PDIP package, preserve pin numbering and mechanical clearance around the socket. Do not rely on a generic 28-pin footprint until the manufacturer pinout and pin 1 orientation have been checked.
Design the supply network around the verified 4.5 V to 5.5 V range and place local decoupling close to the device power pins. Separate noisy switching or relay supplies from the controller rail, and confirm regulator start-up, load transients, and brownout behavior in the full board design. The supplied data does not provide current consumption, so thermal and power-loss calculations require manufacturer electrical data.
Do not substitute a related ATmega solely because it is described as pin compatible. The ATmega168 option has 16 KB flash versus 32 KB for ATMEGA328-PU, while the ATmega88 and ATmega48 alternatives may have lower memory capacity. A replacement must be checked for exact package, pinout, supply, clock, memory map, bootloader, fuse, and peripheral compatibility before production use.
Keep clock and reset routing short, maintain a stable ground reference, and place programming-interface components where they do not introduce noise or accidental reset conditions. For externally connected sensor or relay lines, add protection appropriate to the actual cable environment. The DIP package simplifies rework but does not eliminate high-impedance analog layout and switching-noise concerns.
The ATMEGA328-PU is a digital microcontroller rather than a power semiconductor, so SOA is not applicable. Its primary thermal concern is total board dissipation and the temperature rise of the surrounding PCB and socket at the verified maximum clock and system voltage. Estimate junction temperature only after obtaining the manufacturer power and thermal-resistance data; those values are not present in the supplied web snippets.
معلومات الامتثال
The supplied distributor and search snippets do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance should be confirmed from the current Microchip product documentation.
