EFM32G840F32-QFN64 - 32MHz Cortex-M3 MCU | Silicon Labs
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EFM32G840F32-QFN64 Descripción general
A microcontroller is a programmable system-on-chip that integrates a processor core, memory, digital interfaces, timers, analog peripherals, and power-management functions. The EFM32G840F32-QFN64 belongs to the EFM32 Gecko family and combines an ARM Cortex-M3 core with low-power operating techniques, short wake-up behavior, and energy-saving modes for battery-operated and portable equipment.
Verified product information identifies 32 kB Flash, 8 kB RAM, 56 digital I/O pins, three 16-bit timers, and operation up to 32 MHz. The device is intended for applications that require compact embedded control, efficient peripheral integration, and low-energy operation. Its 64-QFN package provides a high pin count for digital connectivity in a relatively small surface-mount footprint.
The EFM32G840F32-QFN64 is suitable for sensor nodes, industrial monitoring, building automation, portable measurement equipment, connected embedded products, and low-power control systems. The exposed pad supports thermal management when the device dissipates power during operation; PCB copper and thermal design should follow the manufacturer package guidance.
When designing around this MCU, verify the exact pin multiplexing, supply requirements, peripheral availability, and package-specific exposed-pad requirements against the manufacturer datasheet. Do not substitute a different package or pin count without reviewing the complete pinout and board footprint.
This page consolidates verified manufacturer and distributor information, datasheet access, application context, and replacement-screening guidance. It is intended to help engineers identify the correct EFM32G840F32-QFN64 for embedded designs rather than treating similar ARM MCUs as automatically interchangeable.
Alternativas directas para EFM32G840F32-QFN64 — 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 EFM32G840F32-QFN64 (mismo factor de forma y huella) — difiere en Digital I/O Pins, Flash Memory, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
EFM32G840F32-QFN64T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
EFM32G840F128-QFN64
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
EFM32G840F64-QFN64
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
Consulte el precio
Ver hoja de datos →EFM32TG840F32-QFN64T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
EFM32G840F32-QFN64T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
EFM32G840F32-QFN64 Valores máximos y características eléctricas
| Core | ARM Cortex-M3 |
| Architecture | 32-bit RISC |
| Maximum Clock Speed | 32 MHz |
| Flash Memory | 32 kB |
| RAM Memory | 8 kB |
| Digital I/O Pins | 56 |
| Timers | 3 x 16-bit timers |
| Tensión de alimentación | 1.98 V to 3.8 V |
| Nominal Supply Levels | 2.5 V / 3.3 V |
| Encapsulado | 64-QFN (9 x 9 mm) with exposed pad |
| Tipo de montaje | Surface mount |
| Product Family | EFM32 Gecko |
| Low-Power Features | Low-energy techniques and energy-saving modes |
| Wake-Up Behavior | Fast wake-up from energy-saving modes |
| Max Operating Temperature | 85 C |
Guía de configuración de pines de EFM32G840F32-QFN64 64-qfn (9 x 9 mm) with exposed pad
Configuración de pines para EFM32G840F32-QFN64 (encapsulado 64-qfn (9 x 9 mm) with exposed pad). 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 EFM32G840F32-QFN64.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
EFM32G840F32-QFN64 es adecuado para 6 aplicacións: Battery-Powered Sensor Node, Industrial Monitoring and Control, Building Automation Endpoint, Portable Measurement Instrument, Connected Embedded Product, LED Lighting Controller.
Battery-Powered Sensor Node
The EFM32G840F32-QFN64 fits battery-powered sensor nodes because its ARM Cortex-M3 core runs up to 32 MHz while the Gecko platform provides low-energy techniques, fast wake-up times, and energy-saving modes. The device can periodically read sensors, process data, transmit results, and return to a low-power state. Its 8 kB RAM and 32 kB Flash provide local working memory and firmware storage, respectively. The 56 digital I/O pins support sensor interrupts, switches, indicators, and interface signals. Design the duty cycle, regulator quiescent current, and peripheral shutdown behavior around the system battery budget. Wake latency and average current should be measured in the final hardware because they depend on firmware, clock settings, and the selected energy mode.
Recomendado
Industrial Monitoring and Control
The EFM32G840F32-QFN64 is suitable for industrial monitoring modules that need deterministic embedded control, multiple digital inputs, and low-power operation. Its ARM Cortex-M3 processor can execute acquisition, filtering, thresholding, and communication tasks at up to 32 MHz. The 56 digital I/O pins can be assigned through the device pin multiplexing to digital sensors, alarm lines, status indicators, and control outputs. Three 16-bit timers provide useful timing resources for sampling, pulse measurement, or periodic control. The 1.98 V to 3.8 V supply range supports integration with carefully selected low-voltage rails, but industrial transients and grounding still require board-level protection. Validate EMC, isolation, and thermal performance in the final enclosure rather than relying only on the MCU specifications.
Recomendado
Building Automation Endpoint
The EFM32G840F32-QFN64 can serve as a low-power building-automation endpoint for occupancy, environmental, or equipment-control functions. Its 56 digital I/O pins allow connection to inputs, relay drivers, light-control signals, and status LEDs, while three 16-bit timers support periodic sampling and timing tasks. The Cortex-M3 core can manage protocol stacks and local control logic without requiring a higher-performance processor. Energy-saving modes and fast wake-up are useful for devices that remain connected to a common rail or operate from a local energy source. In a building installation, account for long idle periods, capacitor behavior during wake-up, and communication retry logic. Firmware should disable unused peripherals and use the manufacturer’s recommended clock and pin configurations.
Recomendado
Portable Measurement Instrument
The EFM32G840F32-QFN64 fits portable measurement instruments that combine local sensing, signal conditioning, display or communications, and strict energy limits. Its 32 MHz Cortex-M3 core provides enough performance for digital filtering, calibration tables, and control algorithms, while 8 kB RAM supports working buffers and 32 kB Flash stores firmware. The 56-pin digital interface can support sensor selects, measurement triggers, buttons, and status indicators. Low-energy modes can reduce consumption between measurements, while fast wake-up allows the instrument to respond without continuous full-power operation. The exposed-pad package requires a thermal-aware PCB footprint, and analog front-end accuracy should be kept separate from the digital MCU supply design. Validate battery life using the actual measurement interval and radio or display workload.
Recomendado
Connected Embedded Product
The EFM32G840F32-QFN64 can be used in connected embedded products that need a compact control MCU and a manageable number of digital peripherals. The processor executes application logic and communication supervision, while the 56 digital I/O pins handle device presence, user controls, status LEDs, and peripheral selects. The 32 MHz Cortex-M3 performance is suitable for protocol handling and event-driven control, while the 8 kB RAM and 32 kB Flash impose a firm firmware and buffer budget. Low-power modes are valuable when connectivity is intermittent, but radio or network modules may dominate the total power budget. Firmware should define wake conditions, retry limits, and peripheral shutdown order. If the product uses high-speed communication, verify signal integrity and power sequencing rather than assuming a similar ARM MCU is interchangeable.
Recomendado
LED Lighting Controller
The EFM32G840F32-QFN64 is suitable for compact LED-lighting controllers that require deterministic timing, control outputs, and low standby consumption. Its three 16-bit timers can support timing-intensive control tasks, while the 56 digital I/O pins can drive status indicators, buttons, dimming signals, or fault inputs. The Cortex-M3 core at up to 32 MHz can manage dimming logic, watchdog behavior, user-interface updates, and communication supervision. Energy-saving modes help reduce consumption when the lighting output is disabled or the controller is idle. The exact external LED-driver interface, current rating, switching topology, and thermal performance are outside the MCU’s supplied specifications. Confirm the exposed-pad connection and package footprint in the manufacturer documentation, and test dimming behavior across supply and temperature conditions.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para EFM32G840F32-QFN64 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | EFM32G840F32-QFN64T | EFM32G840F128-QFN64 | EFM32G840F64-QFN64 | EFM32TG840F32-QFN64T | EFM32G840F32-QFN64T |
|---|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| CPU Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 |
Diferenciadores clave
- Direct 32 MHz Cortex-M3 control with 32 kB Flash and 8 kB RAM (frente a EFM32G840F32-QFN64T)
- Low-energy Gecko positioning (frente a EFM32TG840F32-QFN64T)
- High pin-count integration in 9 x 9 mm QFN (frente a EFM32G840F128-QFN64)
Notas de diseño
Design the supply rail around the verified 1.98 V to 3.8 V operating range, while accounting for startup current, peripheral load, and regulator transient response. Place the MCU’s decoupling capacitors close to the supply and ground pins according to the manufacturer layout guidance. Do not treat the nominal 2.5 V or 3.3 V descriptions as permission to omit voltage-margin analysis. Confirm the complete electrical limits in the datasheet before finalizing the power tree.
The 64-QFN package includes an exposed pad, so the PCB footprint must provide the manufacturer-required thermal and electrical land pattern. Use a continuous ground connection beneath the device where recommended, preserve solder mask and paste geometry, and provide copper for heat spreading. Actual temperature rise depends on MCU utilization, supply voltage, ambient temperature, and board construction; measure the assembled design rather than relying on a nominal package label.
Do not create a replacement footprint from the generic name “64-QFN.” Verify pin numbering, pin 1 orientation, exposed-pad dimensions, paste apertures, and solder-mask clearance from the package drawing. The supplied verified data does not include the complete numbered pinout, so an engineering release must use the official Gecko datasheet and package drawing. This is especially important for EFM32G840F32-QFN64T or other same-package candidates because package markings alone do not prove pin compatibility.
A similar ARM Cortex-M3 core and 64-QFN package are not sufficient evidence for a drop-in replacement. Compare memory, peripheral mappings, interrupt vectors, clock defaults, supply limits, startup behavior, bootloader assumptions, and exposed-pad requirements. In particular, EFM32G840F32-QFN64T and EFM32TG840F32-QFN64T appear in the supplied cross-reference material, but complete pin-level equivalence is not proven. Validate with the manufacturer documentation and a hardware bring-up test.
Use the Gecko energy-saving modes as part of the system power budget, not as an isolated feature. Define which peripherals remain powered, how the MCU wakes, and what data must survive between sleep intervals. Firmware should disable unused clocks and peripherals and avoid unnecessary polling. Measure average current at the system level because regulators, sensors, communications, pull networks, and exposed-pad thermal behavior can dominate the MCU’s contribution.
Información de cumplimiento
The supplied verified manufacturer and distributor snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Confirm current declarations on the manufacturer product page and applicable distributor records.
