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ATMEGA88-20PU (8-Bit AVR Microcontroller - 20MHz DIP-28 Package)

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If you are prototyping a circuit on a solderless breadboard and find that the older ATmega8 lacks modern features, but the ATmega328P is overkill for your simple code, the ATMEGA88-20PU is exactly what you need. As a direct part of the modern megaAVR family (which includes the 168 and 328P), it utilizes the exact same upgraded silicon architecture, pinout, and advanced peripheral set as the chip found on the Arduino Uno. The only functional difference is that it features a leaner 8KB of Flash memory, making it a highly cost-effective choice for streamlined firmware.

The "-20PU" suffix denotes two highly desirable traits for electronics makers. First, the "PU" signifies it is housed in a standard 28-pin Dual In-line Package (DIP), allowing it to drop perfectly into a standard breadboard or an IC socket without any delicate surface-mount soldering. Second, the "-20" indicates this chip is rated for a blistering maximum clock speed of 20 MHz (when supplied with 5V), giving it a noticeable processing speed advantage over older 16MHz-limited AVR chips. It is the ultimate sandbox chip for hardware interrupts, custom timer configurations, and lean C/C++ programming.

Key Features & Functional Advantages:

  • Modern AVR Architecture: Unlike the older ATmega8, the ATmega88 features Pin Change Interrupts (PCINT) on all pins, an updated USART module, and highly flexible hardware timers that match the capabilities of the modern ATmega328P.

  • Breadboard Native (DIP-28): The 0.1-inch (2.54mm) pin pitch allows for effortless, plug-and-play prototyping. If you fry the chip during a high-voltage test, simply pry it out of your socket and drop in a new one.

  • 20 MHz Maximum Clock Speed: Capable of executing up to 20 Million Instructions Per Second (MIPS) when paired with a 20MHz external crystal and a 5V power supply, providing incredibly snappy execution for timing-critical tasks.

  • Pin-for-Pin Compatibility: Shares the exact same physical pinout as the ATmega168 and ATmega328P, meaning you can prototype your hardware with a 328P and swap down to the cheaper ATmega88 for final production without redesigning your PCB.

  • Robust 5V Tolerance: Operates natively at 5V logic levels, allowing you to drive MOSFETs directly from the pins, interface with classic character LCDs, and read analog 5V sensors without the need for logic level shifters.

Perfect For:

  • Educational Prototyping: An excellent, tactile learning tool for students migrating away from the Arduino IDE and learning bare-metal C programming and AVR register manipulation.

  • Custom Sensor Nodes: Provides plenty of processing power and I/O for reading local sensors (like temperature or moisture) and transmitting that data via I2C or UART to a main gateway.

  • Dedicated Motor Control: A highly capable, dedicated chip for reading rotary encoders and managing PWM outputs for stepper or DC motor drivers in complex robotic mechanisms.

  • Cost-Optimized Hardware: The ideal drop-in replacement for the ATmega328P in simple circuits where the firmware size is well under 8KB, significantly reducing the Bill of Materials (BOM) cost.

Technical Specifications:

  • Core Processor: 8-Bit AVR RISC

  • Maximum Clock Speed: 20 MHz (Requires 4.5V - 5.5V to hit 20MHz reliably)

  • Program Memory (Flash): 8 KB

  • SRAM: 1 KB

  • EEPROM: 512 Bytes

  • Operating Voltage Range: 2.7V – 5.5V

  • Total I/O Pins: 23

  • Analog-to-Digital Converter (ADC): 6 Channels, 10-bit resolution

  • Communication Interfaces: 1 x UART/USART, 1 x SPI, 1 x I2C (Two-Wire Interface)

  • Package / Case: 28-DIP (0.300", 7.62mm width)

  • Mounting Type: Through-Hole (PTH)

  • Operating Temperature: -40°C to 85°C (Industrial)

Ensure your order is placed by 2PM to guarantee next-day delivery! Our commitment to prompt service includes a 24-hour delivery system through our network of carriers, aimed at ensuring your package arrives right on schedule.

Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.