ATMEGA809-MF - 8-Bit AVR MCU 20MHz 8KB Flash | Microchip
MPN: ATMEGA809-MF ✓ فعالATMEGA809-MF نمای کلی
A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals into one chip, sitting at the heart of embedded systems within the broader hierarchy of semiconductors -> integrated circuits -> embedded processors. The megaAVR 0 series is Microchip's modernized AVR line featuring Core Independent Peripherals (CIPs) that operate without CPU intervention.
Key features include the 20 MHz AVR CPU with a hardware multiplier for efficient arithmetic, an Event System that routes peripheral signals internally without CPU load, intelligent analog comprising a 10-bit ADC with up to 12 input channels and comparators, and low-power modes for battery-operated designs. The 8 KB self-programming Flash supports bootloaders, and CRC-capable memory access supports functional-safety workflows.
Architecturally, the ATmega809 uses the enhanced AVR RISC core with a mostly single-cycle instruction set, single-cycle I/O access, and peripherals including USARTs, SPI, TWI (I2C), timers with capture/compare/PWM, and a Configurable Custom Logic (CCL) block. The FuSa designation means the family is supported by safety documentation for IEC 60730/UL 60730 class applications.
Typical applications include home appliances, industrial automation nodes, motor control辅助 boards, and IoT sensor endpoints where deterministic 8-bit control and low BOM cost matter.
Design consideration: the 6x6 VQFN exposed pad should be soldered to a grounded copper pour for thermal dissipation and signal integrity; remember PA0 is shared with UPDI programming.
This page synthesizes distributor pricing, drop-in family alternatives, and design notes not found in the manufacturer datasheet. Pricing shown as of 2026-09-18.
جایگزین‌های drop-in برای ATMEGA809-MF — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای ATMEGA809-MF (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Series, Core Processor, Flash Memory, Peripherals, Programming Interface.
ATMEGA4809-MF
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATMEGA3209-MF
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATMEGA1609-MFR
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATMEGA809-MF حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core | AVR 8-bit |
| Series | megaAVR 0, Functional Safety (FuSa) |
| CPU Speed | 20 MHz |
| Flash Memory | 8 KB (8K x 8) |
| SRAM | 1 KB |
| EEPROM | 256 bytes |
| ADC Resolution | 10 bit |
| دمای کاری | -40C to +125C |
| Supply Voltage Range | 1.8 V to 5.5 V |
| بسته‌بندی / کیس | 48-VFQFN Exposed Pad (6x6 mm) |
| نوع نصب | Surface Mount |
| Packaging | Tray |
| Product Status | Active |
| Peripherals | Event System, CCL, PWM, WDT, brown-out, POR |
| Communication Interfaces | USART, SPI, TWI (I2C) |
| Hardware Multiplier | Yes |
| Programming Interface | UPDI |
راهنمای پیکربندی پین ATMEGA809-MF 48-vfqfn exposed pad (6x6 mm)
پیکربندی پین برای ATMEGA809-MF (پکیج 48-vfqfn exposed pad (6x6 mm)). این IC دیجیتال شامل GPIO، رابط‌های ارتباطی (UART، SPI، I2C) و پین‌های تغذیه است. برای عملکردهای جایگزین پین و گزینه‌های پیکربندی به دیتاشیت سازنده مراجعه کنید. ضروری برای طراحی سیستم‌های نهفته و چیدمان PCB.
داده پین‌آوت تفصیلی موجود نیست برای ATMEGA809-MF.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
ATMEGA809-MF مناسب است برای 6 کاربردs: Home Appliance Control, Industrial Automation Sensor Nodes, IoT Sensor Endpoints, Motor Control Assist Logic, Human Interface and Display Panels, Battery Management and Charging Aux.
Home Appliance Control
The ATMEGA809-MF fits appliance control boards because its megaAVR 0-series FuSa designation is supported by safety documentation for IEC 60730 / UL 60730 class products such as dishwashers, cookers, and HVAC controllers. Its 8 KB Flash and 20 MHz AVR core comfortably run state machines, button scanning, and relay sequencing, while the 10-bit ADC reads NTC temperature sensors across multiple inputs. Core Independent Peripherals - including PWM timers and the Configurable Custom Logic block - handle triac or relay drive timing without CPU load, and the Event System links comparator outputs to timer actions for fast fault shutdown. Placed on a 5 V rail with brown-out reset and watchdog enabled, the device delivers deterministic control at low BOM cost in the 6x6 VQFN footprint.
پیشنهادی
Industrial Automation Sensor Nodes
In factory automation nodes, the ATMEGA809-MF provides a cost-efficient 8-bit controller for limit-switch monitoring, analog sensor digitization, and RS-485-style serial links via its USART with the industrial -40C to +125C temperature rating required on machinery. The 10-bit ADC samples transducer outputs, the TWI interface reads I2C expansion chips, and the Event System triggers conversions off comparator events with microsecond latency independent of software. The 1 KB SRAM accommodates sensor buffering and a Modus-style frame parser, while 8 KB Flash holds protocol and calibration code. Its 5.5 V maximum supply allows direct connection to noisy 5 V industrial rails with a simple LDO, and the exposed-pad VQFN aids heat dissipation inside sealed enclosures.
پیشنهادی
IoT Sensor Endpoints
The ATMEGA809-MF serves battery-powered IoT endpoints where its 8 KB Flash runs a lightweight protocol stack and the megaAVR 0-series sleep architecture minimizes average current. The Event System and Core Independent Peripherals allow periodic sensor sampling with the CPU asleep between events, and the 10-bit ADC reads analog sensors while TWI connects digital sensors on the same two-wire bus. With a 1.8 V supply floor, the device can run directly from a coin cell or two-cell alkaline stack across the full 20 MHz-rated operating range. The 6x6 mm 48-VQFN keeps the PCB footprint small for wearable-adjacent and smart-home sensor form factors, and UPDI single-wire programming simplifies in-field firmware updates through a boot loader.
پیشنهادی
Motor Control Assist Logic
For small motor applications - fans, pumps, and actuator positioning - the ATMEGA809-MF generates complementary PWM via its 16-bit timers and reads back current using the 10-bit ADC with the analog comparator providing fast over-current trip through the Event System. The 20 MHz core executes PID loops with the hardware multiplier accelerating fixed-point arithmetic, a distinguishing advantage of the AVR core over simpler 8-bit MCUs. At 5 V, gate-drive outputs interface directly with driver ICs, and the Configurable Custom Logic block can implement deadlock-free gating between high-side and low-side commands in hardware. The -40C to +125C rating suits enclosure-mounted boards near thermally stressed environments, and the FuSa collateral supports safety-rated stop functions.
پیشنهادی
Human Interface and Display Panels
The ATMEGA809-MF drives keys, encoders, LEDs, and small displays in panel controllers. Its 41 GPIO lines across six ports in one 6x6 mm package eliminate port expanders: PC and PD ports can drive a segment LCD through bit-banged timing, while timers generate backlight PWM dimming. The ADC with internal reference performs capacitive or resistive touch sensing via charge-time measurement, and the Event System routes encoder inputs to counter peripherals without software polling, keeping the CPU free for UI logic. With 1 KB SRAM, buffering a small framebuffer or localized strings is feasible, and the 8 KB Flash stores icons and menus. The wide 1.8-5.5 V supply range matches both 3.3 V logic and 5 V legacy panel harnesses.
پیشنهادی
Battery Management and Charging Aux
In charger and battery-pack auxiliary boards, the ATMEGA809-MF monitors cell voltage and temperature through its 10-bit ADC multiplexed across up to 12 inputs, enforces charge state machines in its 8 KB Flash, and drives status LEDs and charge-enable outputs through PWM and GPIO. The internal analog comparator with Event System routing provides a hardware-level fast over-voltage reaction independent of firmware, a key safety behavior in lithium charging supervision. Supply tolerance from 1.8 V to 5.5 V allows direct operation from regulated pack rails, and the -40C to +125C automotive-adjacent temperature rating survives pack-internal heat. The FuSa family documentation assists in meeting appliance and tool battery safety assessments at minimal controller cost.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ATMEGA809-MF — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ATMEGA4809-MF | ATMEGA3209-MF | ATMEGA1609-MF |
|---|---|---|---|---|
| Package | 48-VQFN (6x6 mm) | 48-VQFN (6x6 mm) - same | 48-VQFN (6x6 mm) - same | 48-VQFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 48 KB | 32 KB | 16 KB |
| SRAM | 1 KB | 6 KB | 4 KB | 2 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
تفاوت‌های کلیدی
- Lowest Flash tier in the pin-compatible 48-pin megaAVR 0 family (در مقابلATMEGA1609-MF)
- Functional Safety (FuSa) collateral support (در مقابلLegacy megaAVR (e.g., ATMEGA48PA))
- Hardware multiplier at 20 MHz (در مقابلATtiny 0/1-series at same price band)
یادداشت‌های طراحی
The 48-VQFN 6x6 exposed pad is the primary GND connection and must be soldered to a solid ground plane via an array of 4x4 or larger thermal vias. Per Microchip packaging guidance, a non-soldered pad degrades both thermal performance and ground integrity for the ADC reference. Place 100 nF decoupling capacitors within 2 mm of each VDD pin, one per pin, plus a 10 uF bulk capacitor near the supply entry. Keep the UPDI pin (PA0) trace short and accessible via a test point for field programming.
The ATMEGA809-MF tolerates 1.8-5.5 V, but ADC accuracy depends on a quiet VDD/AVDD. Estimated: at 5 V and 20 MHz, active-mode current is in the ~10 mA class (per family datasheet typicals), so a 100 mA LDO such as an MCP1700-class regulator suffices for most designs; verify against the current datasheet electrical characteristics table. If powered from a switching pre-regulator, add an RC or ferrite filter to the analog supply and use an external reference on VREF for best ADC results.
PA0 is multiplexed with the UPDI programming interface - never hard-drive it with external circuitry that fights the programmer, or you may lose reprogramming access (a common field-failure cause on megaAVR 0-series boards). Also remember the RST pin can be configured as GPIO only if UPDI remains enabled; disabling UPDI via fuse settings without an external programmer bricks the device. Enable the brown-out detector and watchdog in production code; the default reset threshold settings should be reviewed per your supply-rail ramp profile.
اطلاعات انطباق
RoHS/lead-free status per standard Microchip green packaging for megaAVR 0-series VQFN parts; explicit certificate for this orderable MPN not present in retrieved data - confirm via Microchip Quality portal.
