# ATMEGA328PB-AU (Component) ## Description AVR series Microcontroller IC 8-Bit 20MHz 32KB (16K x 16) FLASH 32-TQFP (7x7) The ATMEGA328PB-AU is a low-power, high-performance 8-bit AVR microcontroller from Microchip Technology. It is an enhanced version of the widely used ATmega328P, offering additional peripherals while maintaining compatibility. It operates on the AVR RISC architecture, enabling efficient instruction execution with most instructions completed in a single clock cycle. This makes it suitable for embedded systems, industrial control, consumer electronics, and IoT applications. The device comes in a 32-pin TQFP package (AU) and integrates memory, analog features, communication interfaces, and timers into a compact solution. Key Features Core & Performance 8-bit AVR RISC CPU Up to 20 MHz clock frequency Single-cycle instruction execution for high efficiency Memory 32 KB Flash (with self-programming capability) 2 KB SRAM 1 KB EEPROM Peripherals & Interfaces 2 × USART (compared to 1 in ATmega328P) 2 × SPI interfaces 2 × I²C (TWI) interfaces Up to 23 programmable I/O pins Timers & PWM 3 Timers/Counters: 2 × 8-bit timers 1 × 16-bit timer Multiple PWM channels Analog Features 10-bit ADC (up to 8 channels) Analog comparator Power & Voltage Operating voltage: 1.8V to 5.5V Multiple low-power modes: Idle Power-down Power-save Standby Special Features Watchdog Timer with independent oscillator Brown-out Detection (BOD) In-System Programming (ISP) Debug support via debugWIRE Package & Temperature Package: TQFP-32 (AU) Operating temperature: Industrial grade: –40°C to +85°C#CommonPartsLibrary #Microcontroller #Atmega328 ## Component Details - **Owner:** adrian95 - **Created:** 6/17/2022 - **Last Updated:** 4/27/2026 - **Visibility:** Public - **Manufacturer Name:** Microchip - **Part Type:** Microcontroller - **Datasheet URL:** https://ww1.microchip.com/downloads/en/DeviceDoc/40001907A.pdf - **License:** https://creativecommons.org/licenses/by/4.0/ - **Symbol Style:** parametric-v1 - **Manufacturer Part Number:** ATMEGA328PB-AU - **Used in:** 664 projects - **Stars:** 2 - **Forks:** 4 ## Distributor Pricing (qty 1) *Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.* | Distributor | Unit Price (qty 1) | Stock | |------------|--------------------|-------| | [Arrow](https://www.arrow.com/en/products/atmega328pb-au/microchip-technology?region=nac) | $1.468 | 0 | | [Digi-Key](https://www.digikey.com/en/products/detail/microchip-technology/ATMEGA328PB-AU/5638812) | $1.63 | 4.7K | | [LCSC](https://www.lcsc.com/product-detail/C132230.html) | $1.8076 | 14K | | [Mouser](https://www.mouser.com/ProductDetail/Microchip-Technology/ATMEGA328PB-AU?qs=jy4bLUHv09hbFONgGrqPbw%3D%3D) | $1.63 | 8.3K | | [TME](https://www.tme.com/us/en-us/katalog/?queryPhrase=ATMEGA328PB-AU) | $1.85 | 250 | | [Verical](https://www.verical.com/pd/microchip-technology-microcontroller-ATMEGA328PB-AU-2618298) | N/A | N/A | - **Part Type:** Integrated Circuits - **Sub-Type:** Logic - **Manufacturer:** Microchip - **MPN:** ATMEGA328PB-AU - **Mount Type:** Wire - **Package / Case Code:** 32-TQFP - **Pin Count:** 32 - **Logic Function:** AND ## Pins | Pin | Name | Type | |-----|------|------| | 18 | AVCC | | | 20 | AREF | | | 4 | VCC | | | 7 | XTAL1/PB6 | | | 8 | XTAL2/PB7 | | | 12 | PB0 | | | 29 | ~RESET~/PC6 | | | 27 | PC4 | | | 16 | PB4 | | | 3 | PE0 | | | 17 | PB5 | | | 30 | PD0 | | | 31 | PD1 | | | 28 | PC5 | | | 15 | PB3 | | | 14 | PB2 | | | 6 | PE1 | | | 2 | PD4 | | | 23 | PC0 | | | 13 | PB1 | | | 19 | PE2 | | | 24 | PC1 | | | 22 | PE3 | | | 9 | PD5 | | | 11 | PD7 | | | 32 | PD2 | | | 10 | PD6 | | | 26 | PC3 | | | 25 | PC2 | | | 1 | PD3 | | | 21 | GND | | | 5 | GND | | --- *Generated from [https://www.flux.ai/adrian95/atmega328pb-au~88i](https://www.flux.ai/adrian95/atmega328pb-au~88i)*