ATmega328P-U PDIP-28 Microcontroller

(3 customer reviews)

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SKU: 162204
  1. 131 powerful instructions – Most Single Clock Cycle Execution
  2. 32 x 8 general purpose working registers
  3. Fully static operation
  4. Up to 20MIPS throughput at 20MHz
  5. On-chip 2-cycle multiplier
  6. Write/erase cycles: 10,000 flash/100,000 EEPROM
  7. Optional boot code section with independent lock bits
  8. In system programming by on-chip boot program
  9. True read while write operation
  10. Programming lock for software security
  11. Two 8-bit timer/counters with separate prescaler and compare mode
  12. One 16-bit timer/counter with separate prescaler, compare mode, and capture mode
  13. Real-time counter with separate oscillator


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Category: Microcontroller ICs
This is a ATmega328P-U PDIP-28 Microcontroller.
This is a Chinese version of ATmega328P-PU IC which also known as ATmega328P-U. So you may receive IC with printed name ATmega328P-U.
The ATMEGA328P- U is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega328P-PU achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
The AVR core combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers.
The ATmega328P-PU AVR is supported with a full suite of program and system development tools including C Compilers, Macro Assemblers, Program Debugger/Simulators, In-Circuit Emulators, and Evaluation Kits.
Note: The available IC model for this type is ATMEGA328P U.


High Performance, Low Power Design:
8-Bit Microcontroller Atmel® AVR® advanced RISC architecture
  1. 131 Instructions most of which are executed in a single clock cycle
  2. Up to 20 MIPS throughput at 20 MHz
  3. 32 x 8 working registers
  4. 2 cycle multiplier
Memory Includes:
  1. 32KB of programmable FLASH
  2. 1KB of EEPROM
  3. 2KB SRAM
  4. 10,000 Write and Erase Cycles for Flash and 100,000 for EEPROM
  5. Data retention for 20 years at 85°C and 100 years at 25°C
  6. Optional bootloader with lock bits
  7. In System Programming (ISP) by via bootloader
  8. True Read-While-Write operation
  9. Programming lock available for software security
I/O and Package:
  1. 23 programmable I/O lines
  2. 28 pin PDIP package
Speed Grades:
  1. 0-4 MHz at 1.8-5.5V
  2. 0-10 MHz at 2.7-5.5V
  3. 0-20 MHz at 4.5-5.5V
Low power consumption mode at 1.8V, 1 MHz and 25°C:
  1. Active Mode: 0.3 mA
  2. Power-down Mode: 0.1 μA
  3. Power-save Mode: 0.8 μA (Including 32 kHz RTC)

Pin Diagram:

Package Includes:

1 x ATmega328P-U PDIP-28 Microcontroller

SKU: 162204 Category:
No. of I/Os


No. of Timers/Counters

3 Timer

Product Type

8-bit Microcontrollers – MCU

Mounting Type

Through Hole

Product Series


Maximum Clock Frequency (MHz)


Data Bus Width

8 bit

Interface Type


Program Memory Size (kB)


Data RAM size and Type


Data ROM Size and Type


Operating Temperature (°C)

-24 to 84

Dimensions (LxWxH) mm

34.8 x 7.5 x 4.57

Shipping Weight 0.004 kg
Shipping Dimensions 8 × 8 × 6 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

Based on 3 reviews

4.7 overall

Add a review

  1. adilahmed786.akhan (verified owner)

    awesome! packaging &fast delivery


  2. rskamath1011 (verified owner)



  3. Pulak Mondal (verified owner)

    I received 328P U, but I was ordered 328P-PU. Item pictures also shows P-PU.

    Pulak Mondal

ATmega328P Datasheet

Questions and answers of the customers

    can we replace ATMEGA328P with this chip ,please h... Read more
  1. 0 votes
    Q can we replace ATMEGA328P with this chip ,please help answer now
    Asked by owais mech on November 21, 2021 4:04 pm
    Read more
  2. plz share a proper link to flash this IC with ardu... Read more
  3. 0 votes
    Q plz share a proper link to flash this IC with arduino bootloader
    Asked by Deokant on June 21, 2020 11:16 pm
    There are no answers for this question yet. Answer now
  4. Does this microcontroller comes with proper fuse s... Read more
  5. 0 votes
    Q Does this microcontroller comes with proper fuse settings burned? answer now
    Asked by rupam.biswas on November 10, 2019 11:26 am

    No, it does not.

  6. Does this microcontroller ic comes with bootloader... Read more
  7. 0 votes
    Q Does this microcontroller ic comes with bootloader ? answer now
    Asked by athulkp533 on November 3, 2019 9:24 am

    It does not come with a pre-flashed bootloader.... Read more

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Country Of Origin: China