ATMEGA4809-MF - 8-Bit AVR MCU 48KB Flash 48-QFN | Microchip
MPN: ATMEGA4809-MF ✓ NakahandaATMEGA4809-MF Ulas
A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals into one chip, forming the highest-volume class of embedded control devices. The ATmega4809 belongs to the 8-bit AVR microcontroller family, which sits under the broader categories of embedded processors and semiconductor integrated circuits. The megaAVR 0-series represents Microchip's latest generation of AVR devices, built around Core Independent Peripherals (CIPs) that operate without CPU intervention.
Key features include 48 KB of self-programmable Flash, 6 KB SRAM, a 10-bit ADC, multiple USARTs, and Core Independent Peripherals such as Configurable Custom Logic (CCL), the TCA/TCB timer family, and event system routing. The AVR architecture executes most instructions in a single cycle, and the hardware multiplier enables efficient 8x8 math for control loops and signal processing.
The device runs from a single supply of 1.8 V to 5.5 V and up to 20 MHz, with low-power features including sleep modes and peripheral clock gating for battery-operated designs. The 48-pin QFN (7x7 mm) footprint exposes up to 48 GPIO across ports A through F, suitable for dense I/O applications.
Typical applications include industrial control and automation nodes, home appliances, Arduino-compatible maker boards (the ATmega4809 powers the Arduino Nano Every and Uno WiFi Rev2), touch-sensing interfaces, and functional-safety-oriented designs leveraging the FuSa support package.
Design consideration: the 48-pin QFN requires an exposed ground pad soldered to a solid ground pour for thermal and electrical performance; also verify which 48-pin variant pinout your footprint targets, since the 40-pin ATmega4809 uses the same die with fewer connected pads.
This page synthesizes verified distributor data, family-level drop-in alternatives, pricing tiers, and practical design notes not consolidated in the manufacturer datasheet.
Mga alternatibo na pwedeng ilagay na ATMEGA4809-MF — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok ATMEGA4809-MF (parehas na form factor at footprint) — pagkakaiba sa Peripherals, Programming Interface, SRAM, Series, Core Processor.
ATMEGA3209-MF
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →ATMEGA1609-MFR
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →ATMEGA809-MF
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →ATMEGA4809-MF Mga Pinakamataas na Rating at Electrical Characteristics
| Core Processor | AVR (8-bit) |
| Core Size | 8-bit |
| Speed | 20 MHz |
| Flash Memory | 48 KB (24K x 16) |
| SRAM | 6 KB |
| EEPROM | 256 bytes |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Series | megaAVR 0-series |
| Feature Class | Functional Safety (FuSa) |
| Peripherals | Core Independent Peripherals (CIP), hardware multiplier |
| Packhaging | 48-QFN (7x7 mm) |
| Uri ng Pagpapasok | Surface Mount |
| Programming Interface | UPDI (Unified Program and Debug Interface) |
Gabay sa Pin Configuration ng ATMEGA4809-MF 48-qfn (7x7 mm)
Pin configuration para sa ATMEGA4809-MF (48-qfn (7x7 mm) package). Kasama sa digital IC na ito ang GPIO, mga communication interface (UART, SPI, I2C), at mga power pin. Sumangguni sa datasheet ng manufacturer para sa mga alternatibong function ng pin at mga opsyon sa configuration. Mahalaga para sa disenyo ng embedded system at PCB layout.
Wala ng detalyadong pinout data na magagamit para sa ATMEGA4809-MF.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
ATMEGA4809-MF ay nararapat para sa 6 aplikasyons: Industrial Control and Automation Nodes, Arduino-Compatible Maker Boards, Home Appliances and White Goods, Capacitive Touch Sensing Interfaces, Battery-Powered and Low-Power IoT End Nodes, Motor Control and Small Drives.
Industrial Control and Automation Nodes
The ATMEGA4809-MF fits industrial control nodes through its Functional Safety (FuSa) product class, 20 MHz deterministic 8-bit core, and Core Independent Peripherals that offload timing, waveform generation, and logic decisions without CPU intervention. Its 1.8 V to 5.5 V supply tolerates noisy industrial rails, and 6 KB SRAM handles Modbus-style protocol buffers. Used as the main controller on sensor nodes, relay drivers, and small PLC I/O modules, it communicates over multiple USARTs (RS-485 via external transceivers). The trade-off versus 32-bit MCUs is lower math throughput, mitigated by the hardware multiplier for fixed-point control loops.
Inirekomenda
Arduino-Compatible Maker Boards
The ATmega4809 is the MCU at the heart of the Arduino Nano Every and Arduino Uno WiFi Rev2, making the ATMEGA4809-MF the natural choice for custom Arduino-compatible boards. The MegaCoreX hardware package provides full Arduino IDE support for the 4809 family, including the 48-pin-standard variant definitions matching this QFN package. Designers benefit from 48 KB Flash (6x an ATmega328P), 6 KB SRAM, and the UPDI single-pin programming interface that frees GPIO. Performance consideration: bootloader selection and UPDI fuse settings differ from classic AVR parts, so boards should expose a dedicated UPDI header for initial programming.
Inirekomenda
Home Appliances and White Goods
Appliance control boards require robust, low-cost 8-bit controllers with ample I/O for buttons, displays, motors, and sensors - the ATMEGA4809-MF provides up to 48 GPIO in one 7x7 mm QFN, plus Configurable Custom Logic (CCL) that can implement safety interlocks in hardware. The wide 1.8 V to 5.5 V supply survives brown-out conditions common in appliance environments, and the FuSa product classification supports safety-relevant documentation requirements. A consideration: verify the exact operating temperature grade in the datasheet for placement near motors or heating elements, and use the on-chip brown-out detector and WDT for fault recovery.
Inirekomenda
Capacitive Touch Sensing Interfaces
Microchip's megaAVR 0-series includes dedicated support for capacitive touch sensing using the ADC and Core Independent Peripherals, making the ATMEGA4809-MF well suited for touch buttons, sliders, and wheels on appliances and HMI panels. The 20 MHz core runs the touch acquisition library while the event system routes timer and comparator signals autonomously, reducing CPU jitter in measurements. With up to 48 I/O pins, one chip can drive both the touch electrodes and an LED or segment display layer. Design consideration: keep touch traces away from switching regulator nodes and follow the Microchip touch sensing application notes for electrode geometry and sensitivity tuning.
Inirekomenda
Battery-Powered and Low-Power IoT End Nodes
The ATMEGA4809-MF's multiple sleep modes, peripheral clock gating, and event-driven CIP architecture let designers keep ADC, timers, and logic running while the CPU sleeps, extending battery life in sensor tags, meters, and remote controls. The 1.8 V floor allows direct operation from two alkaline cells across their discharge curve, and 6 KB SRAM supports lightweight mesh or LoRaWAN-class protocol stacks with external radio modules. Performance trade-off: peak 20 MHz operation is unnecessary in sleep-dominated duty cycles, so scaling the clock down at runtime yields significant average-current savings per the datasheet power tables.
Inirekomenda
Motor Control and Small Drives
The ATMEGA4809-MF suits small BLDC and brushed motor control through its TCA/TCB timer family for complementary PWM generation, the 10-bit ADC for current and back-EMF sensing, and the hardware multiplier for fixed-point PI loops. Core Independent Peripherals allow hardware fault shutdown paths (comparator-to-timer event routing) that react without firmware latency - valuable for overcurrent protection. The 48-pin package exposes enough PWM channels for multi-motor boards. Consideration: the 8-bit core limits complex field-oriented control; for FOC, pair the 4809 as a supervisor or select a 32-bit MCU, while it excels at trapezoidal (six-step) commutation.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ATMEGA4809-MF — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ATMEGA3209-MF | ATMEGA1609-MF | ATMEGA809-MF |
|---|---|---|---|---|
| Package | 48-QFN (7x7 mm) | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same | 48-QFN (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 48 KB | 32 KB | 16 KB | 8 KB |
| SRAM | 6 KB | 4 KB | 2 KB | 1 KB |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
Pangunahing mga Pagkakaiba
- Largest memory in the 48-QFN megaAVR 0 family (kumpara saATMEGA3209-MF)
- Functional Safety (FuSa) product classification (kumpara saATMEGA1609-MF)
- Cost optimization path without respin (kumpara saATMEGA809-MF)
Talaan ng Disenyo
The 48-QFN (7x7 mm) package has an exposed die-attach pad on the underside that must be soldered to a solid, via-stitched ground pour. Use an array of thermal vias (typically 0.3 mm drills) under the pad to tie it to internal ground planes; this pad is the primary ground return, and omitting its solder causes both thermal and signal-integrity problems. Standard QFN land-pattern design per the datasheet footprint drawing includes slightly extended pads (0.25 mm outward) for reliable fillet formation during reflow.
Decouple VDD with at least one 100 nF ceramic capacitor placed within 2 mm of each VDD pin pair, plus a bulk 4.7 uF to 10 uF capacitor near the device. The megaAVR 0-series datasheet recommends keeping the VDD/AVDD trace short and star-routed to reduce ADC noise. Because the device operates down to 1.8 V, ensure the brown-out detector (BOD) threshold is configured appropriately for your supply so firmware does not execute unpredictably during supply sag - configure BOD via fuses for continuous or sampled operation per the power-management chapter.
The most common migration pitfall is assuming legacy AVR toolchain compatibility: the ATmega4809 programs via UPDI only - classic ISP programmers and ATmega328P bootloaders will not work; budget for a PICkit 4, SNAP, or UPDI-capable tool and set the correct fuse configuration. A second pitfall concerns package variants: per the datasheet, the 40-pin ATmega4809 uses the same die with PB[5:0] and PC[7:6] unconnected, requiring INPUT_DISABLE or pull-up configuration on those pins to avoid floating-input current. Always verify footprint against the exact datasheet pinout diagram for your package option.
Impormasyon ng Pagsunod sa Kautusan
Compliance status not stated in the provided verified web data. Microchip standard 0-series parts are typically RoHS-compliant, but per data authenticity rules this must be confirmed from Microchip environmental documentation before publication.
