ATMEGA328P-PU AVR Microcontroller | 8-bit 20MHz PDIP-28 IC

The ATMEGA328P-PU is a high-performance, low-power 8-bit AVR microcontroller featuring 32KB Flash memory, 23 I/O lines, and up to 20 MHz clock speed. Ideal for embedded systems, Arduino-compatible projects, and low-power applications.

Specifications:

• Microcontroller Type: 8-bit AVR RISC architecture

• Instruction Set: 131 powerful instructions; most execute in a single clock cycle

• Performance: Up to 20 MIPS throughput at 20 MHz

• Working Registers: 32 x 8-bit general purpose registers

• Multiplier: 2-cycle hardware multiplier

• Flash Memory: 32KB programmable memory

• EEPROM: 1KB with 100,000 write/erase cycles

• SRAM: 2KB

• Flash Write/Erase Endurance: 10,000 cycles

• Data Retention: 20 years at 85°C, 100 years at 25°C

• Bootloader: Optional bootloader with lock bits

• ISP: In-System Programming via bootloader

• True Read-While-Write: Supported

• Programming Security: Software lock bits available

• I/O Lines: 23 programmable digital I/O pins

• Package Type: 28-pin PDIP (Lead-Free)

• Operating Voltage: 1.8V to 5.5V

• Operating Temperature: -40°C to +85°C

• Speed Grades:

  • 0–4 MHz @ 1.8–5.5V

  • 0–10 MHz @ 2.7–5.5V

  • 0–20 MHz @ 4.5–5.5V

• Power Consumption (at 1.8V, 1 MHz, 25°C):

  • Active Mode: 0.3 mA

  • Power-down Mode: 0.1 µA

  • Power-save Mode: 0.8 µA (with 32 kHz RTC)

• Development Support: Supported by AVR GCC compilers, simulators, and emulators

• Compatibility: Widely used in Arduino Uno and similar development boards