Specifications
| Attribute | Value |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Series | AVR® ATmega |
| Part Status | Active |
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 20MHz |
| Connectivity | I²C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of I/O | 23 |
| Program Memory Size | 32KB (16K x 16) |
| Program Memory Type | FLASH |
| EEPROM Size | 1K x 8 |
| RAM Size | 2K x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.8V ~ 5.5V |
| Data Converters | A/D 8x10b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
Overview
Equivalent
Equivalent products to the ATMEGA328P-MMHR (QFN package, industrial temp range) include:
- ATMEGA328P-AU (TQFP package)
- ATMEGA328P-PU (PDIP package, commercial temp)
- ATMEGA328PB-MMHR (enhanced version with more peripherals)
- ATMEGA328-MU (similar but fewer features)
For drop-in replacements, ensure matching package (QFN-32) and specs (industrial temp: -40°C to +85°C). Alternatives like PIC18F45K22 (Microchip) or STM32F030 (STMicro) require code adaptation.
- ATMEGA328P-AU (TQFP package)
- ATMEGA328P-PU (PDIP package, commercial temp)
- ATMEGA328PB-MMHR (enhanced version with more peripherals)
- ATMEGA328-MU (similar but fewer features)
For drop-in replacements, ensure matching package (QFN-32) and specs (industrial temp: -40°C to +85°C). Alternatives like PIC18F45K22 (Microchip) or STM32F030 (STMicro) require code adaptation.
Features
The ATmega328P-MMHR is a low-power, 8-bit AVR microcontroller with the following key features:
- Core: 8-bit AVR, up to 20 MHz clock speed.
- Memory: 32KB Flash, 1KB EEPROM, 2KB SRAM.
- I/O: 23 programmable GPIO pins.
- Timers: Three timers (two 8-bit, one 16-bit).
- ADC: 6-channel 10-bit ADC.
- Communication: UART, SPI, I²C.
- PWM: 6 PWM channels.
- Packaging: 32-pin QFN (5x5mm), suitable for compact designs.
- Voltage Range: 1.8V–5.5V (low-power operation).
- Peripherals: Watchdog timer, analog comparator, power-saving modes.
Ideal for embedded systems, IoT, and battery-powered applications.
- Core: 8-bit AVR, up to 20 MHz clock speed.
- Memory: 32KB Flash, 1KB EEPROM, 2KB SRAM.
- I/O: 23 programmable GPIO pins.
- Timers: Three timers (two 8-bit, one 16-bit).
- ADC: 6-channel 10-bit ADC.
- Communication: UART, SPI, I²C.
- PWM: 6 PWM channels.
- Packaging: 32-pin QFN (5x5mm), suitable for compact designs.
- Voltage Range: 1.8V–5.5V (low-power operation).
- Peripherals: Watchdog timer, analog comparator, power-saving modes.
Ideal for embedded systems, IoT, and battery-powered applications.
Pinout
The ATMEGA328P-MMHR is a 32-pin AVR microcontroller in a QFN (Quad Flat No-leads) package.
### Key Functions:
- 28 I/O Pins: 23 general-purpose I/O (GPIO) pins, including:
- 6 PWM channels
- 6 ADC inputs (10-bit resolution)
- Serial comms (UART, SPI, I²C)
- On-chip peripherals: Timers, watchdog, and analog comparator.
- Memory: 32KB Flash, 2KB SRAM, 1KB EEPROM.
- Clock speed: Up to 20MHz.
### Pin Count Breakdown:
- 32 total pins (28 usable for I/O, plus power, ground, reset, and crystal oscillator pins).
This compact package is ideal for space-constrained embedded applications.
### Key Functions:
- 28 I/O Pins: 23 general-purpose I/O (GPIO) pins, including:
- 6 PWM channels
- 6 ADC inputs (10-bit resolution)
- Serial comms (UART, SPI, I²C)
- On-chip peripherals: Timers, watchdog, and analog comparator.
- Memory: 32KB Flash, 2KB SRAM, 1KB EEPROM.
- Clock speed: Up to 20MHz.
### Pin Count Breakdown:
- 32 total pins (28 usable for I/O, plus power, ground, reset, and crystal oscillator pins).
This compact package is ideal for space-constrained embedded applications.
Manufacturer
The ATMEGA328P-MMHR is manufactured by Microchip Technology, a leading American semiconductor company. Microchip specializes in microcontrollers, mixed-signal, analog, and Flash-IP solutions. It acquired Atmel (the original developer of the ATmega series) in 2016, integrating the AVR microcontroller line into its portfolio.
Microchip is known for its reliable embedded control products, serving industries like automotive, industrial, consumer electronics, and IoT. The ATMEGA328P-MMHR is a low-power, high-performance 8-bit AVR microcontroller, commonly used in Arduino boards and other embedded systems.
Microchip operates globally, emphasizing innovation and long-term product support.
Microchip is known for its reliable embedded control products, serving industries like automotive, industrial, consumer electronics, and IoT. The ATMEGA328P-MMHR is a low-power, high-performance 8-bit AVR microcontroller, commonly used in Arduino boards and other embedded systems.
Microchip operates globally, emphasizing innovation and long-term product support.
Package
The ATMEGA328P-MMHR comes in a 32-pad VQFN (MLF) package (5x5mm). It's a surface-mount, leadless type with a 0.5mm pitch, suitable for compact designs. The "MMHR" suffix indicates industrial temperature range (-40°C to +85°C) and tape-and-reel packaging. Ideal for space-constrained applications like embedded systems.
