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ATMEGA328PB-MU

MCHPATMEGA328PB-MU

Microchip Technology
Alternate package of the ATmega328PB family for designs preferring a QFN/SMT footprint.
Active17,627 in stock
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Overview

The ATMEGA328PB-MU is an enhanced 8-bit AVR RISC-based microcontroller featuring 32KB of flash, 2KB of RAM, and 1KB of EEPROM in a space-saving 32-VFQFN package. This 'PB' variant improves upon the classic 328P by adding a Peripheral Touch Controller (PTC), more I/O pins, and additional serial interfaces while maintaining a wide 1.8V to 5.5V operating range. It is specifically designed for low-power applications using picoPower technology to achieve shutdown currents as low as 0.2 uA.

Why Choose This Part

This variant provides more peripheral flexibility than the standard 328P, including additional USART, SPI, and TWI interfaces. It maintains high performance with a 20MHz clock speed while offering advanced power management features and an integrated PTC for modern user interface requirements.

Applications

Low-Power Handheld Devices
Utilizes picoPower technology and multiple sleep modes to extend battery life in portable electronics.
Capacitive Touch Interfaces
Integrated Peripheral Touch Controller (PTC) enables buttons, sliders, and wheels without external active components.
Industrial Sensor Nodes
Offers 27 I/O pins and a clock failure detection mechanism for reliable monitoring in industrial environments.
Battery-Powered Wearables
The 5x5mm VQFN package provides a high-density footprint for space-constrained wearable designs.

Key Specifications

Speed 20MHz
RAM Size 2K x 8
Core Size 8-Bit
EEPROM Size 1K x 8
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Connectivity I2C, SPI, UART/USART
Mounting Type Surface Mount
Number of I/O 27
Core Processor AVR
Package / Case 32-VFQFN Exposed Pad
Data Converters A/D 8x10b
Oscillator Type Internal
Program Memory Size 32KB (16K x 16)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 32-VFQFN (5x5)
Voltage - Supply (Vcc/Vdd) 1.8V ~ 5.5V

Getting Started

Develop using the Microchip Studio (formerly Atmel Studio) IDE or the MPLAB X platform with an AVR-GCC compiler. For hardware evaluation, the ATMEGA328PB-XMINI development board provides full access to the MCU pins and integrated debugging. Programming can be performed via the SPI or I2C interfaces using tools like the Atmel-ICE.

ATMEGA328PB Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
ATMEGA328PB-MU (this part) VFQFN-32 17,627
ATMEGA328PB-AU TQFP-32 29,794

Also Consider

ATMEGA328P-MU MCHPMicrochip Technology - Select this for maximum compatibility with legacy Arduino libraries and codebases that do not require the PB-specific peripherals.
ATSAMD21G18A-MFT MCHPMicrochip Technology - A 32-bit ARM Cortex-M0 alternative in a similar QFN package for applications requiring higher processing power and more RAM.

Categories

Microcontrollers > AVR Wearables & Medical > Ultra-Low Power MCUs
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