Microchip ATMEGA328-PU, 8 bit AVR, megaAVR Microcontroller, 20 MHz, 32kB FLASH, 28-Pin PDIP

View all Microcontrollers
Bulk discount available

Subtotal (1 pack of 5 units)*

£9.60

(exc. VAT)

£11.50

(inc. VAT)

Add to Basket
Select or type quantity
In Stock
  • 200 unit(s) ready to ship
  • Plus 95 unit(s) ready to ship from another location
  • Plus 125 unit(s) shipping from 22 December 2025
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units
Per unit
Per Pack*
5 - 20£1.92£9.60
25 - 95£1.864£9.32
100 +£1.796£8.98

*price indicative

Packaging Options:
RS Stock No.:
131-0277
Mfr. Part No.:
ATMEGA328-PU
Brand:
Microchip
Find similar products by selecting one or more attributes.
Select all

Brand

Microchip

Series

megaAVR

Product Type

Microcontroller

Package Type

PDIP

Mount Type

Through Hole

Pin Count

28

Device Core

AVR

Data Bus Width

8bit

Program Memory Size

32kB

Maximum Clock Frequency

20MHz

RAM Size

2kB

Maximum Supply Voltage

5.5V

Analogue Comparators

1

Number of Programmable I/Os

23

Minimum Operating Temperature

-40°C

Maximum Operating Temperature

85°C

Height

4.06mm

Standards/Approvals

No

Width

7.49 mm

Length

34.79mm

Minimum Supply Voltage

1.8V

Number of Timers

2

Program Memory Type

FLASH

ADCs

6 x 10 Bit

Automotive Standard

No

Instruction Set Architecture

RISC

Distrelec Product Id

304-37-088

ATmega328 8-Bit megaAVR Microcontrollers


The Atmel ATmega328 Microcontroller is an 8-bit megaAVR device based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle the ATmega328 achieves throughputs approaching 1 MIPS per MHz, balancing power consumption and speed.

Microcontroller Features


20 MHz Max. Operating Frequency

Up to 20 MIPS at 20 MHz

32 KB Flash

1024 B EEPROM

2 KB SRAM

131 Instructions – Most single clock cycle execution

32 General Purpose Registers

23 GPIO

Power-on Reset and Programmable Brown-out Detection

Internal Calibrated Oscillator

External and Internal Interrupt Sources

Five Power-Saving Sleep Modes

Internal and External Interrupts

Fully Static Operation

Peripheral Features


10-bit 15 ksps Analogue-to-Digital Converter (ADC) – 8 or 6 channels

Capacitive Touch Sense – 16 channels

Temperature Sensor

Two 8-bit Timers

One 16-bit Timer

Output Compare Module – 6 channels

Six PWM Channels

Programmable Serial USART

Master/Slave SPI Serial Interface

Byte-oriented 2-wire Serial Interface – I2C compatible

Programmable Watchdog Timer with Separate Oscillator

Analogue Comparator

Interrupt and Wake-up on Pin Change

Related links