ATMEGA3209-AU - 8-bit AVR MCU 32KB 20MHz TQFP-48 | Microchip
MPN: ATMEGA3209-AU ✓ AktifATMEGA3209-AU Ringkasan
A microcontroller (MCU) is a single-chip computer that combines a processor core, non-volatile program memory, volatile data memory, and integrated peripherals such as timers, communication interfaces, and analog converters. The ATmega3209 belongs to the megaAVR 0-series, Microchip's 8-bit MCU family that sits alongside classic ATmega and tinyAVR lines, and is notable for its Core Independent Peripherals (CIPs) and event system that allow peripheral functions to run without CPU intervention.
Key features include a maximum operating frequency of 20 MHz, 32 KB self-programmable Flash, 4 KB SRAM, 256 bytes of EEPROM, brown-out detection and power-on reset for safe Flash writes, multiple 16-bit timer/counters with PWM, and a peripheral event system that routes signals between on-chip peripherals deterministically. Functional Safety support makes this part suitable for safety-critical designs following IEC 60730 class B guidance.
Architecturally, the ATmega3209 uses the latest AVR core with a two-stage pipeline and single-cycle execution for most instructions, and an integrated hardware multiplier for accelerated arithmetic. The 48-pin package variant exposes the maximum I/O count of the family, allowing service bus support for richer peripheral routing compared with the smaller 28-, 32-, or 40-pin variants in the same series.
Typical applications include industrial control modules, home appliances, IoT sensor nodes, LED lighting controllers, and general consumer electronics where a robust 8-bit MCU with generous Flash, multiple serial ports, and Core Independent Peripherals provides deterministic behavior at low cost. Functional Safety support also enables white-good appliance designs.
When designing with this device, select supply voltage and clock frequency together because the maximum clock speed scales with VDD. Always verify brown-out detector settings before Flash programming to guarantee safe writes, and reserve the 256-byte EEPROM for parameters that must survive power cycles such as calibration and runtime counters.
This page synthesizes distributor pricing, drop-in alternatives within the megaAVR 0-series, and practical design notes not found in the manufacturer datasheet. Prices are quoted as of 2026-10-05.
Alternatif penggantian untuk ATMEGA3209-AU — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian ATMEGA3209-AU (sama faktor bentuk dan footprint) — berbeda di dalam Peripherals, Core Processor, Package, Series, RoHS Status.
ATMEGA4809-AU
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
ATMEGA3209-AFR
✅ Drop-InKontak untuk harga
Lihat Datasheet →ATMEGA3209-AUR
✅ Drop-InKontak untuk harga
Lihat Datasheet →ATMEGA3208-AU
✅ Drop-InKontak untuk harga
Lihat Datasheet →ATMEGA1609-AU
✅ Drop-InKontak untuk harga
Lihat Datasheet →ATMEGA4808-AUR
✅ Drop-InKontak untuk harga
Lihat Datasheet →ATMEGA3209-AU Rating Maksimal & Karakteristik Listrik
| Series | megaAVR 0-series |
| Core Processor | AVR |
| Core Size | 8-bit |
| Frekuensi Bawah Maximum | 20 MHz |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM (SRAM) | 4 KB |
| EEPROM | 256 B |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| Paket | 48-pin TQFP (7x7 mm) |
| Tipe Mounting | Surface Mount |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, PWM, POR (Power-On Reset) |
| Suhu Kerja | -40 C to +85 C (industrial) |
| Functional Safety | FuSa (IEC 60730 class B support) |
| Status RoHS | Compliant |
| Lead Free | Yes |
Konfigurasi Pin ATMEGA3209-AU
| Pin produk 1 | VCC — Digital supply voltage |
| Pin produk 2 | PA0 — Port A bit 0 (GPIO/ADC) |
| Pin produk 3 | PA1 — Port A bit 1 (GPIO/ADC) |
| Pin produk 4 | PA2 — Port A bit 2 (GPIO/ADC) |
| Pin produk 5 | PA3 — Port A bit 3 (GPIO/ADC/REF) |
| Pin produk 6 | GND — Ground |
| Pin produk 7 | PA4 — Port A bit 4 (GPIO) |
| Pin produk 8 | PA5 — Port A bit 5 (GPIO) |
| Pin produk 9 | PA6 — Port A bit 6 (GPIO) |
| Pin produk 10 | PA7 — Port A bit 7 (GPIO) |
| Pin produk 11 | PB0 — Port B bit 0 (GPIO/USART) |
| Pin produk 12 | PB1 — Port B bit 1 (GPIO/USART) |
| Pin produk 13 | PB2 — Port B bit 2 (GPIO/SPI) |
| Pin produk 14 | PB3 — Port B bit 3 (GPIO/SPI) |
| Pin produk 15 | PB4 — Port B bit 4 (GPIO/SPI) |
| Pin produk 15 | PB5 — Port B bit 5 (GPIO/SPI/I2C) |
| Pin produk 16 | GND — Ground |
| Pin produk 17 | VCC — Digital supply voltage |
| Pin produk 18 | PC0 — Port C bit 0 (GPIO) |
| Pin produk 19 | PC1 — Port C bit 1 (GPIO) |
| Pin produk 20 | PC2 — Port C bit 2 (GPIO/I2C) |
| Pin produk 21 | PC3 — Port C bit 3 (GPIO/I2C) |
| Pin produk 22 | PC4 — Port C bit 4 (GPIO) |
| Pin produk 23 | PC5 — Port C bit 5 (GPIO) |
| Pin produk 24 | PC6 — Port C bit 6 (GPIO) |
| Pin produk 25 | PC7 — Port C bit 7 (GPIO) |
| Pin produk 26 | PD0 — Port D bit 0 (GPIO) |
| Pin produk 27 | PD1 — Port D bit 1 (GPIO) |
| Pin produk 28 | PD2 — Port D bit 2 (GPIO) |
| Pin produk 29 | PD3 — Port D bit 3 (GPIO) |
| Pin produk 30 | PD4 — Port D bit 4 (GPIO) |
| Pin produk 31 | PD5 — Port D bit 5 (GPIO) |
| Pin produk 32 | GND — Ground |
| Pin produk 33 | VCC — Digital supply voltage |
| Pin produk 34 | PE0 — Port E bit 0 (GPIO) |
| Pin produk 35 | PE1 — Port E bit 1 (GPIO) |
| Pin produk 36 | PE2 — Port E bit 2 (GPIO) |
| Pin produk 37 | PE3 — Port E bit 3 (GPIO) |
| Pin produk 38 | PF0 — Port F bit 0 (GPIO/ADC) |
| Pin produk 39 | PF1 — Port F bit 1 (GPIO/ADC) |
| Pin produk 40 | PF2 — Port F bit 2 (GPIO/ADC) |
| Pin produk 41 | PF3 — Port F bit 3 (GPIO/ADC) |
| Pin produk 42 | PF4 — Port F bit 4 (GPIO/ADC) |
| Pin produk 43 | PF5 — Port F bit 5 (GPIO/ADC) |
| Pin produk 44 | RESET — Reset input (active low) |
| Pin produk 45 | UPDI — Unified Program and Debug Interface |
| Pin produk 46 | GND — Ground |
| Pin produk 47 | AVCC — Analog supply voltage |
| Pin produk 48 | AREF — Analog reference voltage |
Aplikasi Umum
ATMEGA3209-AU cocok untuk 6 aplikasis: Industrial Control Module, Home Appliance Control, IoT Sensor Node, LED Lighting Controller, Consumer Electronics User Interface, Automotive Body Electronics (Auxiliary).
Industrial Control Module
The ATMEGA3209-AU is an excellent fit for industrial control applications that demand reliability at 8-bit cost. Its 20 MHz AVR core executes deterministic single-cycle instructions while the Core Independent Peripherals (CIPs) and event system offload tasks from the CPU, freeing cycles for application logic. The 32 KB Flash comfortably holds IEC 60730 class B self-test routines plus the main control loop, while the 4 KB SRAM buffers sensor and fieldbus frames. Brown-out detection and power-on reset guarantee safe Flash writes under noisy 24 V industrial rails, and the 1.8-5.5 V supply range accepts common 3.3 V or 5 V regulated rails directly.
Direkomendasikan
Home Appliance Control
The ATMEGA3209-AU is qualified for Functional Safety (FuSa) applications targeting IEC 60730 class B household appliance requirements, per Microchip's megaAVR 0-series FuSa documentation. Its 32 KB Flash holds the application firmware plus the FuSa self-test library, and the brown-out detector plus watchdog timer combine to satisfy the class B diagnostic coverage. The peripheral event system routes signals between timers, ADC, and PWM channels deterministically, ideal for motor speed loops in washing machines, dishwasher pumps, or induction cooktops. The 48-pin TQFP-48 package provides enough GPIO to drive multiple triac/MOSFET outputs plus user-interface buttons and displays.
Direkomendasikan
IoT Sensor Node
The ATMEGA3209-AU is well-matched to battery-powered IoT sensor nodes where deterministic low-power behavior matters most. Its peripheral event system lets a sensor trigger an ADC conversion and DMA transfer without waking the CPU, while sleep currents in the microamp range extend battery life. The 32 KB Flash holds a small TLS/UDP stack plus application logic, and the 4 KB SRAM buffers sensor reads and outgoing frames. Pair it with an external radio module over SPI or UART for a quick wireless node; the 1.8-5.5 V supply range accepts single-cell lithium or 2xAA chemistries directly. The brown-out detector prevents unsafe Flash writes as the battery drains.
Direkomendasikan
LED Lighting Controller
The ATMEGA3209-AU drives multi-channel LED lighting controllers where deterministic PWM and color-mixing accuracy matter most. Its multiple 16-bit timer/counters with PWM outputs handle RGBW channels at 16-bit resolution for smooth color fades, while the event system synchronizes PWM updates to a single timer tick for zero jitter. The 20 MHz core executes color-mixing algorithms in real time, and the 32 KB Flash stores scenes and dimming curves. The 48-pin TQFP-48 package exposes enough PWM-capable pins for up to 16 LED channels plus DMX or DALI interface support over a UART or SPI-connected transceiver.
Direkomendasikan
Consumer Electronics User Interface
The ATMEGA3209-AU is well-suited for consumer electronics user-interface modules where cost and feature integration matter most. Its 32 KB Flash holds capacitive-touch and button-handling firmware, while the 4 KB SRAM buffers display updates and event queues. The I2C/SPI/UART interfaces easily drive small OLED or TFT displays, scan capacitive-touch ICs, and accept commands from a host processor. The 1.8-5.5 V supply range lets the same firmware run on a single-cell Li-ion or 2xAA pack, and the small 48-pin TQFP-48 footprint fits inside handheld remote controls and small appliances.
Direkomendasikan
Automotive Body Electronics (Auxiliary)
The ATMEGA3209-AU can serve auxiliary body-electronics roles in non-safety-critical automotive systems when paired with the automotive-grade variant ATMEGA3209-AFR. Its 32 KB Flash stores body-control logic, 4 KB SRAM buffers CAN/LIN messages via external transceivers, and the 48-pin TQFP-48 footprint fits behind dashboard panels. The AVR core executes single-cycle instructions deterministically, and the peripheral event system handles LIN bus synchronization without fixed-trip CPU overhead. For harsher under-hood or chassis applications, prefer the ATMEGA3209-AFR automotive temperature grade or upgrade to ATMEGA4809-AFR with 48 KB Flash.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk ATMEGA3209-AU — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | ATMEGA4809-AU | ATMEGA3209-AFR | ATMEGA3209-AUR | ATMEGA3208-AU | ATMEGA1609-AU | ATMEGA4808-AU |
|---|---|---|---|---|---|---|---|
| Package | 48-pin TQFP (7x7 mm) | 48-pin TQFP (7x7 mm) - identical | 48-pin TQFP (7x7 mm) - identical | 48-pin TQFP (7x7 mm) - identical | 48-pin TQFP (7x7 mm) - identical | 48-pin TQFP (7x7 mm) - identical | 48-pin TQFP (7x7 mm) - identical |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 48 KB (+50%) | 32 KB (identical) | 32 KB (identical) | 32 KB (identical) | 16 KB (-50%) | 48 KB (+50%) |
| SRAM | 4 KB | 6 KB (+50%) | 4 KB (identical) | 4 KB (identical) | 4 KB (identical) | 2 KB (-50%) | 6 KB (+50%) |
| Maximum Clock Frequency | 20 MHz | 20 MHz (identical) | 20 MHz (identical) | 20 MHz (identical) | 20 MHz (identical) | 20 MHz (identical) | 20 MHz (identical) |
| Core | AVR 8-bit | AVR 8-bit | AVR 8-bit | AVR 8-bit | AVR 8-bit | AVR 8-bit | AVR 8-bit |
| 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 | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Functional Safety (FuSa) | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Diferensiator Kunci
- Functional Safety (FuSa) IEC 60730 class B support (vsClassic ATmega328P-AU)
- Event system and Core Independent Peripherals (CIPs) (vsATmega328P-AU)
- More Flash and SRAM than ATmega328P (vsATmega328P-AU)
Catatan Desain
The ATMEGA3209-AU operates from 1.8 V to 5.5 V supply, but maximum F_CPU scales with VDD per the ATmega3208/3209 datasheet (DS40002174C). Place a 100 nF decoupling capacitor as close as possible to each VCC pin (the 48-pin TQFP exposes 4 VCC/AVCC pins) plus a bulk 10 uF tantalum or ceramic on the supply rail. Use a low-dropout regulator such as MCP1700 for battery-powered designs to minimize quiescent current overhead.
Route the UPDI (Unified Program and Debug Interface) pin as a dedicated single-ended trace to a programming header, keeping it short and away from switching nodes. The RESET pin is internally pulled up but should also have a 10 kohm external pull-up and a 100 nF capacitor for noise immunity. For best ADC accuracy, route AVCC separately from VCC and place a ferrite bead plus decoupling on AVCC per the datasheet reference design.
Brown-out detection (BOD) must be configured before any Flash or EEPROM write - if VDD falls below the BOD threshold during a write, the device may be left in an undefined state. Use the internal 32 kHz ultra-low-power oscillator for sleep-mode timing instead of waking the main 20 MHz oscillator, which dramatically reduces power in duty-cycled designs. Never program the lock bits before verifying Flash contents, as locked devices require a full chip erase to recover.
The peripheral event system lets peripherals signal each other without CPU intervention - for example, a timer overflow can trigger an ADC start automatically. Take advantage of this for deterministic timing: route PWM updates through the event system rather than ISR-driven sequences to avoid jitter. For SPI buses running above 5 MHz, add 22-33 ohm series resistors near the driver pins to dampen ringing, especially with long PCB traces.
Informasi Konformitas
RoHS and lead-free per Microchip product page. Automotive-grade variant ATMEGA3209-AFR is AEC-Q100 qualified; the ATMEGA3209-AU is industrial grade (-40 to +85 C) and is NOT AEC-Q100 qualified.
