ATMEGA809-MF - 8-Bit AVR MCU 20MHz 8KB Flash | Microchip
N.º de pieza: ATMEGA809-MF ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.15 | $1,15 |
| 10 | $1.04 | $10,40 |
| 100 | $0.92 | $92,00 |
| 500 | $0.83 | $415,00 |
| 1.000 | $0.75 | $750,00 |
ATMEGA809-MF Descripción general
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.
Alternativas directas para ATMEGA809-MF — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ATMEGA809-MF (mismo factor de forma y huella) — difiere en Series, Core Processor, Flash Memory, Peripherals, Programming Interface.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATMEGA4809-MF
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$0.85 / unidad
Ver hoja de datos →ATMEGA3209-MF
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$0.55 / unidad
Ver hoja de datos →ATMEGA1609-MFR
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$1.25 / unidad
Ver hoja de datos →ATMEGA809-MF Valores máximos y características eléctricas
| 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 |
| Temperatura de funcionamiento | -40C to +125C |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Encapsulado / Carcasa | 48-VFQFN Exposed Pad (6x6 mm) |
| Tipo de montaje | 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 |
Guía de configuración de pines de ATMEGA809-MF 48-vfqfn exposed pad (6x6 mm)
Configuración de pines para ATMEGA809-MF (encapsulado 48-vfqfn exposed pad (6x6 mm)). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para ATMEGA809-MF.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
ATMEGA809-MF es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATMEGA809-MF — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- Lowest Flash tier in the pin-compatible 48-pin megaAVR 0 family (frente a ATMEGA1609-MF)
- Functional Safety (FuSa) collateral support (frente a Legacy megaAVR (e.g., ATMEGA48PA))
- Hardware multiplier at 20 MHz (frente a ATtiny 0/1-series at same price band)
Notas de diseño
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.
Información de cumplimiento
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.
