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ATmega4809-AU

8-bit AVR MCU, 48KB Flash, 6KB SRAM, Event System, TQFP-48

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Manufacturer Part：

ATmega4809-AU

Package：

TQFP-48 (7 x 7 x 1.0 mm)

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Description

Product Overview

The ATmega4809-AU from Microchip Technology is an 8-bit AVR microcontroller with 48KB Flash, 6KB SRAM, 41 I/O pins, and 12-channel 10-bit ADC in a TQFP-48 package.

Key Specifications

Type 8-bit AVR Microcontroller
Max Frequency 20 MHz
Flash 48 KB
SRAM 6 KB
EEPROM 256 bytes
I/O Pins 41
ADC 12 channels x 10-bit
Communication 1x USART, 1x SPI, 1x TWI (I2C)
Timers 4 (1x TCB + 1x TCA + 2x TCD)
PWM 6 channels
Event System Yes
Supply Voltage 1.8V to 5.5V
Package TQFP-48 (7 x 7 mm)
Operating Temperature -40C to +85C

Features

  • 48KB Flash and 6KB SRAM
  • Event system for peripheral interconnection without CPU
  • Configurable Custom Logic (CCL)
  • Single-cycle I/O access
  • Peripheral Touch Controller (PTC) for capacitive sensing
  • UPDI programming interface

Applications

  • Embedded control systems
  • Capacitive touch interfaces
  • IoT sensor nodes
  • Home automation

The ATmega4809-AU from Microchip Technology is a modern 8-bit AVR microcontroller from the megaAVR 0-series, offering 48KB Flash and 6KB SRAM in a TQFP-48 package. The device introduces advanced features not found in classic AVR devices: an Event System that allows peripherals to communicate directly without CPU intervention, Configurable Custom Logic (CCL) that implements glue logic in hardware, and a Peripheral Touch Controller (PTC) for capacitive sensing without external components. The UPDI (Unified Program and Debug Interface) single-pin programming interface simplifies board design. The 41 I/O pins provide extensive connectivity, while the 12-channel 10-bit ADC supports multi-sensor applications. The 6KB SRAM is significantly larger than classic ATmega devices, enabling more complex algorithms and communication buffers.

The ATmega4809 uses an enhanced AVR 8-bit RISC architecture where most instructions execute in a single clock cycle at 20 MHz. The CPU accesses I/O registers in a single cycle, providing deterministic peripheral control. The Event System is a 6-channel routing network that connects event generators (timer overflows, pin changes, ADC completions) to event users (timer inputs, DMA triggers, CCL inputs) without software intervention, enabling real-time response with zero CPU overhead. The CCL implements programmable combinational and sequential logic (LUTs with optional flip-flops) that can replace external glue logic ICs. The PTC performs capacitive touch sensing by measuring the charge transfer between the sensor pad and an internal sampling capacitor, providing touch detection without external components. The UPDI interface uses a single-wire bidirectional protocol for programming and debugging, replacing the 4-wire ISP interface of classic AVR devices.

Pin Group Name Type Function
Multiple PA0-PA7, PB0-PB7, etc. I/O 41 programmable digital I/O pins
Analog AIN0-AIN11 Input 12 ADC input channels
Serial TXD/RXD I/O USART serial port
Serial MOSI/MISO/SCK/SS I/O SPI port
Serial SDA/SCL I/O TWI/I2C port
Debug UPDI I/O Single-pin programming/debug
Power VDD/VSS Power Supply and ground
  • Smart home thermostat with PTC capacitive touch buttons and 6KB SRAM for Wi-Fi buffer
  • IoT sensor node with Event System for autonomous ADC-to-UART data streaming
  • Industrial panel controller with CCL replacing external logic for LED multiplexing
  • Motor control application with 6-channel PWM and 48KB Flash for FOC algorithm
Manufacturer Part Number Package Notes
Microchip ATmega4808-AU TQFP-32 Same core, fewer pins (28 I/O)
Microchip ATmega3209-AU TQFP-48 32KB Flash, lower cost
Microchip ATmega2560-AU TQFP-100 Classic AVR, 256KB Flash, more I/O
ST STM32G070CBT6 LQFP-48 32-bit ARM, similar pin count
Renesas R7FA2E1A72DFK LQFP-48 RA2E1 ARM Cortex-M23, 128KB
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Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

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Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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