ATMEGA48-20AU
8-bit MCU with 4kB of Flash memory, 0.256kB of EEPROM, and 23 I/O pins - ATMEGA48-20AUATMEGA48-20AU
8-bit MCU with 4kB of Flash memory, 0.256kB of EEPROM, and 23 I/O pins - ATMEGA48-20AU
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Manufacturer Part # : ATMEGA48-20AU
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Package/Case: TQFP-32
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Brand: Microchip Technology
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Product Categories : Microcontrollers
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Series : ATMEGA48
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ATMEGA48-20AU DataSheet

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ATMEGA48-20AU Details
The ATMEGA48-20AU is an 8-bit AVR microcontroller from Microchip Technology, designed for various applications such as embedded systems, consumer electronics, industrial automation, control systems, and communication devices. This device features a wide operating voltage range of 2.7V to 5.5V, making it suitable for portable electronics, home appliances, robotics, automotive systems, and medical devices.
Pinout
- Package: QFP32
- (Tip: For detailed pinout information, please refer to the corresponding datasheet.)
Key Features
- 4KB Flash Memory: Provides ample storage for program code and data.
- 256 bytes EEPROM: Offers non-volatile memory for storing configuration settings or other data.
- 512 bytes SRAM: Provides temporary storage for variables and data processing.
- 20MHz Clock Speed: Enables fast execution of program code and efficient data processing.
- 32 General Purpose I/O Pins: Offers flexibility in connecting peripherals, sensors, or other devices.
- 8-channel 10-bit ADC: Supports analog-to-digital conversion for sensing temperature, light, or other physical parameters.
- 2 8-bit Timer/Counters: Enables timing and counting applications in various domains.
- 1 16-bit Timer/Counter: Offers higher-resolution timing and counting capabilities.
- Serial Communication Interfaces: UART, SPI, I2C: Supports communication protocols for connecting devices or exchanging data with other systems.
Applications
The ATMEGA48-20AU is suitable for various applications such as:
- Embedded systems
- Consumer electronics
- Industrial automation
- Control systems
- Communication devices
Where to Use
The ATMEGA48-20AU can be used in various applications such as:
- Portable electronics
- Home appliances
- Robotics
- Automotive systems
- Medical devices
How to Use
To use the ATMEGA48-20AU, follow these steps:
- Connect the device to a power supply and ground.
- Configure the serial communication interfaces (UART, SPI, I2C) as needed.
- Write program code using the AVR compiler or other development tools.
- Upload the program code to the ATMEGA48-20AU.
(Tip: For detailed usage instructions and programming guides, refer to the datasheet.)
Application Circuit
The application circuit diagram for the ATMEGA48-20AU illustrates how to connect the microcontroller to various peripherals or devices. It includes connections for power supply, ground, and communication bus lines, ensuring proper operation and reliable data transmission.
(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)
Equivalents
- ATmega48PA: A similar 8-bit AVR microcontroller from Microchip Technology offering comparable features and performance.
- ATtiny45: An alternative 8-bit AVR microcontroller from Microchip Technology with equivalent functionality.
Complementary
The ATMEGA48-20AU can be complemented by other devices or modules that provide additional features or capabilities, such as:
- Auxiliary memory chips for increased storage capacity.
- Sensors or actuators for monitoring or controlling physical parameters.
- Communication modules for wireless connectivity or data transmission.
Frequently Asked Questions
Q: What is the maximum clock speed supported by the ATMEGA48-20AU?
A: The ATMEGA48-20AU supports a maximum clock speed of 20MHz. For more details, refer to the datasheet for specific operating conditions and limitations.
Q: Can the ATMEGA48-20AU be used in automotive applications?
A: Yes, the ATMEGA48-20AU is suitable for automotive applications, offering reliable operation and robustness in demanding environments.

Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Product Category ! | 8-bit Microcontrollers - MCU | RoHS | Details |
Core | AVR | Program Memory Size | 4 kB |
Data RAM Size | 512 B | Package / Case | TQFP-32 |
Maximum Clock Frequency | 20 MHz | ADC Resolution | 10 bit |
Number of I/Os | 23 I/O | Supply Voltage - Min | 2.7 V |
Supply Voltage - Max | 5.5 V | Mounting Style | SMD/SMT |
Data Bus Width | 8 bit | Minimum Operating Temperature | - 40 C |
Maximum Operating Temperature ! | + 85 C | Series | ATmega48 |
Analog Supply Voltage | 1.8 V to 5.5 V | Brand | Microchip Technology |
Data RAM Type | SRAM | Data ROM Size | 512 B |
Data ROM Type | EEPROM | Height | 1 mm |
I/O Voltage | 1.8 V to 5.5 V | Interface Type | I2C, SPI, USART |
Length | 7 mm | Moisture Sensitive | Yes |
Number of ADC Channels | 8 Channel | Number of Timers/Counters | 3 Timer |
Processor Series | megaAVR | Product | MCUs |
Product Type ! | 8-bit Microcontrollers - MCU | Program Memory Type ! | Flash |
Factory Pack Quantity | 250 | Subcategory | Microcontrollers - MCU |
Tradename | AVR | Watchdog Timers | Watchdog Timer |
Width | 7 mm | Unit Weight | 0.011288 oz |
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is ATMEGA48-20AU?
The ATMEGA48-20AU is a high-performance, low-power 8-bit microcontroller designed by Microchip Technology. It belongs to the ATmega series of microcontrollers and is ideal for a wide range of embedded applications, including consumer electronics, automotive systems, and industrial automation.
How Does ATMEGA48-20AU Work?
The ATMEGA48-20AU functions as a versatile microcontroller with a rich set of features including programmable I/O pins, timers, analog-to-digital converters, and communication interfaces. It executes instructions from its flash memory and interfaces with external devices to perform tasks based on the embedded program logic.
How Many Pins does ATMEGA48-20AU have and What are the Functions of the Pinout Configuration?
The ATMEGA48-20AU comes in a 32-pin TQFP (Thin Quad Flat Package) package. The pinout configuration includes:
- VCC: Power supply pin.
- GND: Ground pin.
- RESET: Reset pin for restarting the microcontroller.
- XTAL1, XTAL2: Crystal oscillator input and output pins for clock generation.
- PORTx: General-purpose I/O pins for data communication.
- ADCx: Analog-to-digital converter input pins for analog signal processing.
- USART: Universal synchronous/asynchronous receiver-transmitter for serial communication.
What are the Pros and Cons of ATMEGA48-20AU?
Pros:
- High Performance: Provides a balance of performance and power efficiency for various applications.
- Rich Feature Set: Includes analog and digital peripherals for versatile functionality.
- Extensive Connectivity: Supports communication interfaces like USART for data exchange.
- Flexible I/O Configuration: Offers programmable I/O pins for customization.
- Industry Standard: Part of the popular ATmega series known for reliability and scalability.
Cons:
- Complex Programming: Requires understanding of embedded programming concepts for efficient utilization.
- External Components: May need additional components like crystal oscillator for clock accuracy.
- Higher Cost: Advanced features may lead to a higher overall system cost compared to simpler microcontrollers.
Are There Any Equivalents/Alternatives to ATMEGA48-20AU for Recommendation?
- The ATMEGA328P from Microchip is a higher variant with more flash memory and I/O pins.
- Alternatives to the ATMEGA48-20AU include the PIC16F877A from Microchip and the STM32F103 from STMicroelectronics.
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Price details
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