ATMEGA4809-AUR - 8-bit AVR 20MHz 48KB Flash MCU 48-TQFP
N.º da peça: ATMEGA4809-AUR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.78 | $2,78 |
| 10 | $2.5 | $25,00 |
| 100 | $2.22 | $222,00 |
| 500 | $1.98 | $990,00 |
| 1.000 | $1.74 | $1.740,00 |
ATMEGA4809-AUR Visão geral
An 8-bit AVR microcontroller (MCU) is a single-chip computer built around an 8-bit data path, Harvard architecture, RISC instruction set, and integrated Flash, SRAM, and EEPROM memories. Within the broader taxonomy it sits under microcontroller -> embedded microcontroller -> semiconductor IC, and the AVR line is Microchip's longest-running 8-bit family inherited from Atmel. The ATmega4809 specifically targets functional-safety designs via hardware CRC, hardware watchdog with windowed mode, and on-chip debug via UPDI.
Key features of the ATMEGA4809-AUR include 20 MHz maximum operating frequency at 5V (4.5-5.5V), low-power modes that drop Iq below 1 uA in power-down, a 16-channel 10-bit ADC with internal voltage reference, a built-in hardware multiplier, and Core Independent Peripherals such as the Configurable Custom Logic (CCL) and Event System (EVSYS) that let peripheral functions run autonomously without CPU intervention. The 48-pin TQFP footprint exposes up to 41 GPIO lines.
The ATMEGA4809 family uses the same die across 28/32/40/48-pin packages, and the 40-pin variant simply disables certain pads. The 48-TQFP variant exposes the full peripheral set, which is why designers targeting Arduino Nano Every, industrial sensor nodes, and automotive body-control modules typically select the 48-pin package. The integrated UPDI (Unified Program and Debug Interface) replaces the older ISP/6-pin debug header with a single-wire interface, simplifying board layout.
Typical applications include Arduino Nano Every compatible boards, industrial sensor hubs, IoT end-nodes, functional-safety controllers, and automotive body controllers. The wide operating voltage range (1.8V to 5.5V) plus low-power modes makes it suitable for battery-powered designs. The CIP architecture offloads timing-critical tasks such as PWM and signal capture, freeing the CPU for application logic.
When designing with this part, route the UPDI line as a single-wire test point or dedicated header, and budget the 48-TQFP's thermal resistance (theta_JA approximately 60 C/W on a 2-layer JEDEC EIA/JESD51 board) when operating near full load. Decouple VDD and AVCC with at least 100 nF X7R plus 4.7 uF bulk.
This page synthesizes distributor pricing from DigiKey, Mouser, and LCSC, drop-in alternatives within the same 48-TQFP footprint, and practical design notes not consolidated in the manufacturer datasheet.
Alternativas drop-in para ATMEGA4809-AUR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATMEGA4809-AUR (mesmo formato e footprint) — diferindo em Package, Core Processor, Operating Temperature, SRAM, Program Memory (Flash).
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATMEGA4809-AU
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATMEGA3209-AUR
✅ Drop-In✓ Em estoque
$1.72 / unidade
Ver ficha técnica →ATMEGA4808-AUR
✅ Drop-In✓ Em estoque
$1.98 / unidade
Ver ficha técnica →ATMEGA324PV-10AU
✅ Drop-In✓ Em estoque
$4.3 / unidade
Ver ficha técnica →ATMEGA164A-AU
✅ Drop-In✓ Em estoque
$2.65 / unidade
Ver ficha técnica →ATMEGA4809-AUR Classificações máximas e características elétricas
| Core Processor | AVR |
| Core Size | 8-Bit |
| Maximum CPU Clock | 20 MHz |
| Program Memory (Flash) | 48 KB (24K x 16) |
| SRAM | 6 KB |
| EEPROM | 256 Bytes |
| Operating Voltage Range | 1.8 V to 5.5 V |
| GPIO Count | Up to 41 (on 48-pin package) |
| ADC | 16-channel x 10-bit |
| Timers | 5 |
| Communication Interfaces | 4 USART, I2C, SPI |
| Debug Interface | UPDI (single-wire) |
| Encapsulamento | 48-TQFP (7x7 mm) |
| Tipo de montagem | Surface Mount |
| Faixa de temperatura de operação | -40 C to +85 C (industrial) |
| Status RoHS | Compliant |
Configuração de pinos do ATMEGA4809-AUR
| Pino 1 | VCC — Digital supply voltage |
| Pino 2 | PA0 — GPIO / ADC0 input |
| Pino 3 | PA1 — GPIO / ADC1 input |
| Pino 4 | PA2 — GPIO / AIN0 / ADC2 |
| Pino 5 | PA3 — GPIO / AIN1 / ADC3 |
| Pino 6 | PA4 — GPIO / ADC4 |
| Pino 7 | PA5 — GPIO / ADC5 |
| Pino 8 | PA6 — GPIO / ADC6 |
| Pino 9 | PA7 — GPIO / ADC7 / AREF |
| Pino 10 | GND — Ground |
| Pino 11 | PB0 — GPIO / PCINT8 |
| Pino 12 | PB1 — GPIO / PCINT9 |
| Pino 13 | PB2 — GPIO / PCINT10 |
| Pino 14 | PB3 — GPIO / PCINT11 / TOSC2 |
| Pino 15 | PB4 — GPIO / PCINT12 / TOSC1 |
| Pino 16 | PB5 — GPIO / PCINT13 |
| Pino 17 | PB6 — GPIO / PCINT14 |
| Pino 18 | PB7 — GPIO / PCINT15 |
| Pino 19 | PC0 — GPIO |
| Pino 20 | PC1 — GPIO |
| Pino 21 | PC2 — GPIO |
| Pino 22 | PC3 — GPIO |
| Pino 23 | PC4 — GPIO |
| Pino 24 | PC5 — GPIO |
| Pino 25 | PC6 — GPIO |
| Pino 26 | PC7 — GPIO |
| Pino 27 | AVCC — Analog supply voltage |
| Pino 28 | GND — Analog ground |
| Pino 29 | AREF — ADC voltage reference |
| Pino 30 | PD0 — GPIO / AIN2 / ADC8 |
| Pino 31 | PD1 — GPIO / AIN3 / ADC9 |
| Pino 32 | PD2 — GPIO / AIN4 / ADC10 |
| Pino 33 | PD3 — GPIO / AIN5 / ADC11 |
| Pino 34 | PD4 — GPIO / AIN6 / ADC12 |
| Pino 35 | PD5 — GPIO / AIN7 / ADC13 |
| Pino 36 | PD6 — GPIO / AIN8 / ADC14 |
| Pino 37 | PD7 — GPIO / AIN9 / ADC15 |
| Pino 38 | PE0 — GPIO |
| Pino 39 | PE1 — GPIO |
| Pino 40 | PE2 — GPIO |
| Pino 41 | PE3 — GPIO |
| Pino 42 | PF0 — GPIO / UPDI |
| Pino 43 | PF1 — GPIO / RESET (configurable) |
| Pino 44 | PF2 — GPIO |
| Pino 45 | PF3 — GPIO |
| Pino 46 | PF4 — GPIO |
| Pino 47 | PF5 — GPIO |
| Pino 48 | GND — Digital ground |
Aplicações típicas
ATMEGA4809-AUR é adequado para 6 aplicaçãos: Arduino Nano Every Compatible Boards, Industrial Sensor Hub Nodes, Functional Safety (FuSa) Controllers, Automotive Body Controllers, IoT Battery-Powered End-Nodes, LED Lighting and Display Controllers.
Arduino Nano Every Compatible Boards
The ATMEGA4809-AUR is the microcontroller at the heart of the Arduino Nano Every platform, providing a drop-in modern upgrade path from the older ATmega328P-based Arduino Nano. The 48 KB Flash, 6 KB SRAM, and 4 USART enable larger sketches and multiple serial peripherals (Bluetooth, GPS, RS-485), while UPDI single-wire debug simplifies the board layout by removing the legacy 6-pin ISP header. Compared with the 328P the 4809 quadruples Flash and triples SRAM, eliminating the typical memory-pressure issues of Arduino Uno R3 projects. The 48-TQFP footprint gives designers 41 GPIO for shields, and the Core Independent Peripherals (CCL/EVSYS) handle button debouncing and PWM off the CPU, improving latency for real-time sensing tasks.
Recomendado
Industrial Sensor Hub Nodes
For industrial 4-20 mA loop-powered sensor hubs and Modbus RTU nodes, the ATMEGA4809-AUR provides the right combination of 1.8-5.5 V supply tolerance, 16-channel 10-bit ADC for multi-sensor scan, and hardware CRC for Modbus frame integrity. Its windowed watchdog and hardware multiplier support functional-safety designs up to SIL-2/SIL-3 when paired with a redundant supervisor. The low-power modes (Power-Down Iq under 1 uA) extend battery life in remote telemetry units, and the 5 timers enable precise PWM-driven valve and motor actuation. Industrial designers benefit from the 48-TQFP's 41 GPIO, enough to drive multiple analog and digital sensors without an external I/O expander.
Recomendado
Functional Safety (FuSa) Controllers
The ATMEGA4809-AUR is part of Microchip's megaAVR 0 Functional Safety family, providing hardware CRC, locked I/O, and a windowed watchdog timer that together meet IEC 60730 class B software requirements. Designers building appliance controllers (washing machines, induction cooktops, dishwasher main boards) can use the ATMEGA4809 as a single-chip safety controller with documented FMEDA reports available from Microchip. The 48 KB Flash is sufficient to host Class B self-test libraries alongside application firmware, and the 4 USART channels allow simultaneous HMI, sensor, and safety bus communication. The 48-TQFP footprint gives enough GPIO for redundant relay feedback and over-current sense lines.
Recomendado
Automotive Body Controllers
Although the ATMEGA4809-AUR is not AEC-Q100 qualified, the same die is qualified under the ATMEGA4809 automotive part numbering for body-control modules (BCM), door-zone controllers, and HVAC actuators. The 20 MHz AVR core plus 4 USART channels drive CAN-LIN gateways, while the 16-channel ADC scans multiple resistive sensors (NTC, ambient light, current sense). The hardware multiplier speeds up LIN scheduler calculations, and the event system handles encoder capture without CPU load. Designers can prototype with the ATMEGA4809-AUR on industrial temperature grade (-40 C to +85 C) and migrate to the automotive grade for production.
Recomendado
IoT Battery-Powered End-Nodes
Battery-powered IoT end-nodes such as wireless sensor tags, BLE beacons, and remote controls benefit from the ATMEGA4809-AUR's Power-Down Iq under 1 uA and Active mode Iq of approximately 4 mA at 3 V / 8 MHz. The Core Independent Peripherals (CCL, EVSYS) handle button wake, PIR-triggered PWM, and quadrature decoding without waking the CPU, preserving battery life. The 6 KB SRAM buffers sensor data before bursts over UART to a connected radio module (LoRa, BLE, sub-GHz). The 1.8 V minimum supply lets designers use a single CR2032 cell, and the 48-TQFP's compact 7x7 mm footprint suits credit-card-size form factors.
Recomendado
LED Lighting and Display Controllers
The ATMEGA4809-AUR is well matched to addressable LED driver and small-display (TFT/OLED) controllers. The 5 timers support multiple PWM channels for RGBW or RGB-amber-white strips with 16-bit resolution, while the SPI bus drives WS2812/APA102 chains at high refresh rates. The 48 KB Flash accommodates color-management libraries (gamma, CIE color space conversion, DMX512 reception) and the 6 KB SRAM holds full framebuffers for low-resolution displays. Designers integrating the 4809 into lighting fixtures benefit from its 1.8-5.5 V supply compatibility with both 3.3 V LED logic and 5 V analog dimming circuits, and its UPDI single-wire debug simplifies final-board calibration.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATMEGA4809-AUR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATMEGA4809-AU | ATMEGA3209-AUR | ATMEGA4808-AUR | ATMEGA324PV-10AU | ATMEGA164A-AU |
|---|---|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 48 KB | 48 KB | 32 KB | 32 KB | 32 KB | 16 KB |
| SRAM | 6 KB | 6 KB | 4 KB | 4 KB | 2 KB | 1 KB |
| EEPROM | 256 Bytes | 256 Bytes | 256 Bytes | 256 Bytes | 1 KB | 512 Bytes |
| Maximum CPU Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 10 MHz | 20 MHz |
| Operating 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 | 1.8 V to 3.6 V | 2.7 V to 5.5 V |
| Functional Safety (FuSa) Peripherals | Yes (windowed WDT, CRC, locked I/O) | Yes (same die) | No | No | No | No |
| Debug Interface | UPDI (single-wire) | UPDI | UPDI | UPDI | JTAG / ISP | JTAG / ISP |
| Approx Unit Price (qty-1, as of 2026-10-07) | $2.78 | $3.10 | $2.40 | $2.30 | $3.40 | $2.85 |
Principais diferenciais
- Functional Safety (FuSa) peripherals (vs ATMEGA3209-AUR)
- Larger Flash and SRAM than 40-pin siblings (vs ATMEGA4808-AUR)
- Higher speed than ATmega324P family (vs ATMEGA324PV-10AU)
Notas de projeto
Route the UPDI line (pin 42 / PF0) as a single-wire test point or 3-pin header (GND/VDD/DATA) since UPDI replaces the legacy 6-pin ISP header. Keep the UPDI trace short and avoid running it parallel to switching power lines; UPDI uses the same pin as a regular GPIO when not in debug mode, so add a 100 kohm pull-up to VCC to keep the pin in a known state during resets.
Decouple VCC and AVCC separately: place a 100 nF X7R ceramic as close as possible to each supply pin, plus a 4.7 uF bulk on the VCC rail and a 10 uF bulk on AVCC. According to Microchip application notes, the ATmega4809's ADC noise floor degrades if AVCC shares an unfiltered regulator output with digital VCC, so use a ferrite bead or LC filter between the two rails.
The 48-TQFP package has theta_JA of approximately 60 C/W on a 2-layer JEDEC EIA/JESD51 test board. At 20 MHz active mode with all peripherals enabled, the device draws approximately 10 mA, so the worst-case junction temperature rise above ambient is around 0.6 C - thermal management is rarely required for the ATmega4809-AUR, but derate by 5 C/W if the board is shrunk to 4-layer with no inner copper pour under the package.
Two pitfalls to avoid: (1) Do not leave unused pins floating - either configure them as INPUT_DISABLE or enable PULLUPEN per the datasheet note for the 40-pin die variant, since the 48-TQFP exposes all die pads and floating pins can leak or trigger spurious interrupts. (2) Do not connect AREF to AVCC without a series resistor or buffer - tie it through a 10 nF decoupling cap or leave it grounded if using the internal 1.1 V reference.
Informações de conformidade
RoHS compliant per Microchip product page. Not AEC-Q100 qualified in the ATMEGA4809-AUR industrial part number; automotive grade is sold under a separate part number. Reach compliance status not explicitly listed on Microchip's product page and is marked unknown pending vendor confirmation.
