Microchip, 8bit AVR, ATmega Microcontroller, 20MHz, 32 kB Flash, 28-Pin PDIP

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£9.60

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£11.50

(inc. VAT)

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  • 255 unit(s) ready to ship
  • Plus 95 unit(s) ready to ship from another location
  • Plus 140 unit(s) shipping from 22 October 2025
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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
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Brand

Microchip

Family Name

ATmega

Package Type

PDIP

Mounting Type

Through Hole

Pin Count

28

Device Core

AVR

Data Bus Width

8bit

Program Memory Size

32 kB

Maximum Frequency

20MHz

RAM Size

2 kB

USB Channels

0

Number of PWM Units

1

Number of SPI Channels

2

Typical Operating Supply Voltage

1.8 → 5.5 V

Number of CAN Channels

0

Number of I2C Channels

1

Number of UART Channels

1

Number of USART Channels

1

Maximum Operating Temperature

+85 °C

Number of Ethernet Channels

0

Dimensions

34.79 x 7.49 x 4.06mm

Width

7.49mm

Number of ADC Units

1

Height

4.06mm

Number of LIN Channels

0

Instruction Set Architecture

RISC

Length

34.79mm

ADCs

6 x 10 bit

Maximum Number of Ethernet Channels

0

Pulse Width Modulation

1 (6 Channel)

Number of PCI Channels

0

Minimum Operating Temperature

-40 °C

Program Memory Type

Flash

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

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