ATMEGA4809-PF - 8-Bit AVR MCU 20MHz 48KB Flash PDIP-40 | Microchip
N.º de pieza: ATMEGA4809-PF ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.9 | $3,90 |
| 10 | $3.55 | $35,50 |
| 100 | $3.25 | $325,00 |
| 500 | $3 | $1.500,00 |
| 1.000 | $2.75 | $2.750,00 |
ATMEGA4809-PF Descripción general
A microcontroller (MCU) is a single-chip computer integrating a processor core, program memory, data memory, and peripherals such as UARTs, SPI, I2C, timers, and ADCs. Within the power-management hierarchy of embedded systems, the megaAVR 0-series sits in the general-purpose 8-bit microcontroller class, succeeding the classic ATmega328P generation with the AVR core enhanced by a hardware multiplier and Core Independent Peripherals (CIPs).
Key features of the ATMEGA4809-PF include the 20 MHz AVR CPU with hardware multiplier, Core Independent Peripherals that offload tasks from the CPU, multiple UART/SPI/TWI communication interfaces, event system routing, and CRC-Scan for memory integrity checking. The 40-pin PDIP format is a major differentiator: it is breadboard-friendly and ideal for education, prototyping, and legacy through-hole designs. According to the Microchip datasheet (DS40002173), the 40-pin version uses the die of the 48-pin ATmega4809 with fewer connected pads, so PB[5:0] and PC[7:6] must be configured as disabled or pull-up enabled.
The device operates from 1.8V to 5.5V and integrates a 10-bit ADC, analog comparators, and a flexible oscillator system with 20 MHz internal oscillator, eliminating external clock components in many designs. Unified Program and Debug Interface (UPDI) provides single-wire programming and debugging.
Typical applications include industrial control, Arduino-compatible education platforms (the Arduino Nano Every uses the ATmega4809), home appliances, and legacy ATmega328P upgrades requiring more Flash and SRAM.
Design consideration: when migrating from ATmega328P, note that register maps and programming tools change to UPDI and the megaAVR 0-series register model, so firmware requires porting.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, providing information gain for sourcing and engineering decisions.
Alternativas directas para ATMEGA4809-PF — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATMEGA3209-PF
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ATMEGA1609-PF
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ATMEGA809-PF
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ATMEGA4809-PF Valores máximos y características eléctricas
| Core Processor | AVR (megaAVR 0-series), 8-bit |
| Core Size | 8-bit |
| Frecuencia de reloj máxima | 20 MHz |
| Flash Memory | 48 KB (24K x 16) |
| SRAM | 6 KB |
| EEPROM | 256 bytes |
| Encapsulado | 40-PDIP |
| Tipo de montaje | Through Hole |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Peripherals | Core Independent Peripherals (CIPs), Event System, CRC-Scan |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| ADC Resolution | 10-bit |
| Hardware Multiplier | Yes |
| Programming Interface | UPDI (Unified Program and Debug Interface) |
| Functional Safety Support | Yes (FuSa) |
| Series | megaAVR 0-series |
Configuración de pines de ATMEGA4809-PF
| Pin 1 | VDD — Power supply |
| Pin 2 | GND — Ground |
| Pin 3 | PB5 — General purpose I/O, Port B |
| Pin 4 | PB4 — General purpose I/O, Port B |
| Pin 5 | PB3 — General purpose I/O, Port B |
| Pin 6 | PB2 — General purpose I/O, Port B |
| Pin 7 | PB1 — General purpose I/O, Port B |
| Pin 8 | PB0 — General purpose I/O, Port B |
| Pin 9 | PA7 — General purpose I/O, Port A |
| Pin 10 | PA6 — General purpose I/O, Port A |
| Pin 11 | PA5 — General purpose I/O, Port A |
| Pin 12 | PA4 — General purpose I/O, Port A |
| Pin 13 | PA3 — General purpose I/O, Port A |
| Pin 14 | PA2 — General purpose I/O, Port A |
| Pin 15 | PA1 — General purpose I/O, Port A |
| Pin 16 | PA0/UPDI — General purpose I/O / Unified Program and Debug Interface |
| Pin 17 | GND — Ground |
| Pin 18 | VDD — Power supply |
| Pin 19 | PC7 — General purpose I/O, Port C (configure per datasheet on 40-pin die) |
| Pin 20 | PC6 — General purpose I/O, Port C (configure per datasheet on 40-pin die) |
| Pin 21 | PC5 — General purpose I/O, Port C |
| Pin 22 | PC4 — General purpose I/O, Port C |
| Pin 23 | PC3 — General purpose I/O, Port C |
| Pin 24 | PC2 — General purpose I/O, Port C |
| Pin 25 | PC1 — General purpose I/O, Port C |
| Pin 26 | PC0 — General purpose I/O, Port C |
| Pin 27 | PD7 — General purpose I/O, Port D |
| Pin 28 | PD6 — General purpose I/O, Port D |
| Pin 29 | PD5 — General purpose I/O, Port D |
| Pin 30 | PD4 — General purpose I/O, Port D |
| Pin 31 | PD3 — General purpose I/O, Port D |
| Pin 32 | PD2 — General purpose I/O, Port D |
| Pin 33 | PD1 — General purpose I/O, Port D |
| Pin 34 | PD0 — General purpose I/O, Port D |
| Pin 35 | PF6/RESET — General purpose I/O / External reset |
| Pin 36 | PE3 — General purpose I/O, Port E |
| Pin 37 | PE2 — General purpose I/O, Port E |
| Pin 38 | PE1 — General purpose I/O, Port E |
| Pin 39 | PE0 — General purpose I/O, Port E |
| Pin 40 | PF7 — General purpose I/O, Port F |
Aplicaciones típicas
ATMEGA4809-PF es adecuado para 6 aplicacións: Arduino-Compatible Education Platforms, Industrial Control and Automation, Legacy ATmega328P Design Upgrades, Home Appliance Control, Sensor Nodes and IoT Endpoints, Prototyping and Custom Embedded Development.
Arduino-Compatible Education Platforms
The ATMEGA4809-PF is the microcontroller behind the Arduino Nano Every, and its 40-pin PDIP package makes it the natural choice for breadboard-based electronics education. The 48 KB Flash provides generous room for student projects using Arduino libraries that often exceed the 32 KB of the classic ATmega328P, while 6 KB SRAM comfortably hosts the Arduino runtime with serial debugging. Programming uses UPDI with inexpensive tools, and the Arduino IDE megaAVR core provides a familiar API. The through-hole DIP format survives repeated insertion cycles in classroom settings where QFN or TQFP parts would be impractical. Cost-effectiveness at roughly $3.83 (LCSC, as of 2026-10-12) keeps per-student BOM costs low, and drop-in family variants (ATMEGA3209/1609/809) let educators scale Flash to budget.
Recomendado
Industrial Control and Automation
In industrial control nodes such as sensor hubs, relay controllers, and small PLC logic, the ATMEGA4809-PF delivers deterministic 8-bit control with Core Independent Peripherals (CIPs) that run timers, communication, and event routing without CPU intervention, improving real-time reliability. The CRC-Scan feature continuously verifies Flash integrity - a requirement in functional-safety-oriented designs supported by Microchip's FuSa documentation package. Operating from a 1.8V to 5.5V rail allows direct connection to industrial 5V logic, and the wide -40C-capable temperature options suit factory-floor enclosures. The multiple USARTs allow simultaneous RS-485 Modbus and debug channels. The through-hole PDIP-40 format simplifies field service and hand-repair in maintenance-friendly industrial equipment where SMD rework is not feasible.
Recomendado
Legacy ATmega328P Design Upgrades
Designs built around the ATmega328P (Arduino Uno-class) that have outgrown 32 KB Flash or 2 KB SRAM can migrate to the ATMEGA4809-PF's larger 48 KB/6 KB resources while remaining in the AVR ecosystem. Typical upgrade triggers are OTA-style bootloader growth, added protocol stacks, or data-logging buffers. The megaAVR 0-series register model differs from classic AVR, so firmware requires porting, but Microchip's Atmel START and the MegaCoreX Arduino core ease migration. The 20 MHz clock with hardware multiplier also roughly doubles integer math throughput versus the 16 MHz 328P for control loops. Designers should budget for a UPDI programming header replacing the ISP header, and verify that PB[5:0]/PC[7:6] pad behavior is handled per the datasheet on the 40-pin version.
Recomendado
Home Appliance Control
Washing machines, dishwashers, and small kitchen appliances use 8-bit MCUs like the ATMEGA4809-PF for keypad scanning, display driving, motor sequencing, and safety interlock monitoring. The 10-bit ADC reads NTC temperature sensors and user potentiometers, while CIP-based PWM generates motor drive or buzzer outputs without CPU load. The 1.8V to 5.5V supply range and low-power sleep modes (down to microamp-level in power-down per the family datasheet) support energy-efficiency requirements in standby. Functional Safety (FuSa) support assists appliance manufacturers documenting safety-relevant stop functions. The robust through-hole PDIP package withstands the vibration and thermal cycling typical of appliance environments and enables cost-effective repairability required in some markets.
Recomendado
Sensor Nodes and IoT Endpoints
Battery-powered sensor nodes benefit from the ATMEGA4809-PF's low-power architecture: power-down sleep, peripheral event system allowing sensors to wake the MCU without CPU polling, and 6 KB SRAM for buffering readings between radio transmissions. Multiple USARTs and TWI interfaces connect to temperature, humidity, and pressure sensors as well as a radio module simultaneously. The 10-bit ADC with internal reference digitizes analog sensor outputs, and the hardware CRC engine validates data frames before transmission. While the PDIP-40 package is larger than QFN alternatives, it excels in prototyping and low-volume IoT deployments where hand assembly matters; production versions can pin-migrate to the same die in smaller packages within the ATmega4809 family.
Recomendado
Prototyping and Custom Embedded Development
The ATMEGA4809-PF is a favorite for custom embedded prototypes: the 0.1-inch DIP pitch plugs directly into breadboards and wire-wrap sockets, and the UPDI single-wire interface means only one pin is needed for programming and debugging - leaving 40+ GPIO/touch-capable pins available. The 20 MHz internal oscillator removes the need for an external crystal in most prototypes, and Atmel START generates peripheral initialization code for USARTs, TWI, ADC, and timers in minutes. Developers combining the MCU with FPGA or ADC boards can bit-bang or use hardware SPI at up to half the core clock. Compared to QFN-based prototyping, DIP eliminates adapter boards, and design errors can be corrected with a socket swap in seconds rather than hot-air rework.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATMEGA4809-PF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATMEGA3209-PF | ATMEGA1609-PF | ATMEGA809-PF |
|---|---|---|---|---|
| Package | 40-PDIP | 40-PDIP - same | 40-PDIP - same | 40-PDIP - 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 |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Programming Interface | UPDI | UPDI | UPDI | UPDI |
| Supply Voltage Range | 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 |
Diferenciadores clave
- Largest Flash in the PDIP-40 megaAVR 0-series (frente a ATMEGA3209-PF)
- Modern megaAVR 0-series core with CIPs (frente a ATMEGA1284P-PU)
- Breadboard-friendly through-hole format (frente a ATMEGA4809 SMD variants (e.g., TQFP/QFN))
Notas de diseño
On the 40-pin version of the ATmega4809, Microchip states in datasheet DS40002173 that the device uses the 48-pin die with fewer connected pads. PB[5:0] and PC[7:6] must therefore be explicitly disabled (INPUT_DISABLE) or configured with pull-ups (PULLUPEN) in firmware; leaving them as floating inputs can increase supply current and cause erratic behavior. Always initialize these pins early in startup code.
Place a 100 nF ceramic decoupling capacitor across VDD/GND pins (1/2 and 17/18 pairs) as close to the package as possible, plus a 10 uF bulk capacitor on the board. The internal 20 MHz oscillator removes the need for a crystal, but if an external clock is used for UART accuracy-critical baud rates, keep crystal traces short. UPDI (PA0) should route to a 3-pin header (VDD, UPDI, GND) for programming access.
The device operates from 1.8V to 5.5V; for 5V systems ensure the regulator can handle the active-mode current of the megaAVR 0-series plus peripherals. Estimated: at 20 MHz with all peripherals active, budget several tens of milliwatts per the family datasheet typical active supply figures - verify exact current in DS40002173 electrical characteristics for your clock configuration before sizing the regulator.
Información de cumplimiento
FindIC lists the family as GREEN package. Formal RoHS/REACH certificates should be obtained from Microchip's product page for the exact ordering code.
