EFM32G840F64-QFN64 - 32MHz Cortex-M3 MCU | Silicon Labs
MPN： EFM32G840F64-QFN64 ✓ 啟用中EFM32G840F64-QFN64 概覽
A microcontroller is a programmable semiconductor that integrates a processor core, memory, I/O, timers, and communication peripherals on one integrated circuit. Within the product hierarchy, the EFM32G840F64-QFN64 is a 32-bit ARM Cortex-M3 MCU in the EFM32 Gecko family. It executes embedded control logic while providing local digital interfaces, analog functions, and low-power operating modes for connected products.
The verified device features include a 32 MHz maximum CPU speed, 64 kB Flash, 16 kB RAM, 56 digital I/O pins, and three 16-bit timers. Distributor data also identifies a 64-QFN package with a 9 mm by 9 mm body and an exposed pad. The package supports surface-mount assembly, while the exposed pad provides the primary thermal connection on the PCB.
The Cortex-M3 architecture gives the MCU a 32-bit processing interface suitable for control loops, human-interface logic, communications, and general embedded tasks. The Gecko low-power platform is particularly relevant in battery-operated equipment because the device combines conventional processing with energy-saving modes. Designers should use the Silicon Labs documentation to configure wake behavior, clocks, peripherals, and current-consumption targets for the exact product configuration.
Typical uses include industrial sensor nodes, connected meters, portable medical accessories, smart-building controls, compact consumer devices, and low-energy IoT equipment. Its 56 digital I/O pins can support buttons, displays, indicators, and external interface signals, while the three 16-bit timers are useful for timing, pulse generation, and periodic control tasks.
A critical design consideration is decoupling and exposed-pad layout. Place the required bypass capacitors close to the supply pins and connect the exposed thermal pad according to the manufacturer's package guidance. Validate the power rails, boot configuration, peripheral pin mapping, and low-power behavior on hardware before production.
This page combines verified manufacturer and distributor facts with engineering-focused selection, comparison, sourcing, and design guidance. It is intended to help engineers identify the correct MCU, verify package assumptions, and assess migration options without relying on unverified electrical or lifecycle assumptions.
直接替換替代品，適用於 EFM32G840F64-QFN64 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： EFM32G840F64-QFN64 （相同外形與佔位） — 差異在於 Package, Digital I/O Pins, Flash Memory, Maximum Clock Speed, Series.
EFM32G840F64-QFN64T
✅ 直接替換📋 參考替代品（不在目錄中）
EFM32LG840F64-QFN64
✅ 直接替換📋 參考替代品（不在目錄中）
EFM32GG230F1024G-E-QFN64
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EFM32G840F64-QFN64 最大額定值與電氣特性
| Product Type | 32-bit ARM Cortex-M3 microcontroller |
| CPU Maximum Frequency | 32 MHz |
| Flash Memory | 64 kB |
| RAM | 16 kB |
| Digital I/O Pins | 56 pins |
| Timer Count | 3 x 16-bit timers |
| Supply Voltage Range | 1.98 V to 3.8 V |
| 封裝 | 64-QFN, 9 mm x 9 mm |
| Package Type | QFN surface-mount package with exposed pad |
| Core | ARM Cortex-M3 |
| Series | EFM32 Gecko |
| 安裝類型 | Surface Mount |
| 腳位數 | 64 pins |
EFM32G840F64-QFN64 qfn surface-mount package with exposed pad 腳位配置指南
EFM32G840F64-QFN64（qfn surface-mount package with exposed pad 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： EFM32G840F64-QFN64.
請參閱 資料表 以查看完整腳位配置。
典型應用
EFM32G840F64-QFN64 適用於 6 應用s: Low-Power Industrial Sensor Node, Smart-Building Control Module, Portable Medical Accessory, Connected Energy Meter, Battery-Powered IoT Controller, Compact Consumer Control Panel.
Low-Power Industrial Sensor Node
The EFM32G840F64-QFN64 fits industrial sensor nodes that periodically measure a physical quantity, filter the result, and communicate status while minimizing idle energy. Its ARM Cortex-M3 core operates up to 32 MHz for control logic, while 64 kB Flash and 16 kB RAM provide local storage for firmware and data handling. The three 16-bit timers support periodic sampling, debounce timing, or sensor excitation. The Gecko low-power platform is relevant when the design relies on energy-saving modes and fast wake-up behavior. Engineers should validate the actual current profile with the selected sensor and radio rather than assuming MCU-only consumption determines battery life.
推薦
Smart-Building Control Module
The EFM32G840F64-QFN64 is suitable for smart-building controllers that combine local inputs, relay or indicator outputs, and low-power behavior. Its 56 digital I/O pins provide resources for buttons, occupancy inputs, status LEDs, and control signals, while the three 16-bit timers can handle periodic tasks and timing sequences. The 32 MHz Cortex-M3 core can manage protocol state machines and local decision logic. In a building-control design, the MCU can wake from an energy-saving state, sample inputs, update an actuator, and return to sleep. Exact pin multiplexing, supply sequencing, and exposed-pad thermal design should be confirmed using the manufacturer documentation.
推薦
Portable Medical Accessory
The EFM32G840F64-QFN64 can support compact portable medical accessories that require local control, timed measurements, and low standby energy. The 32 MHz Cortex-M3 core is appropriate for managing sensor reads, user input, display updates, and device state, while 64 kB Flash and 16 kB RAM are useful for compact firmware. Three 16-bit timers can support measurement windows, button handling, and periodic service routines. The product's energy-saving modes and fast wake-up behavior are relevant to battery-powered operation, but medical designs must also address applicable product-specific safety, isolation, EMC, and documentation requirements. No medical certification is inferred from the supplied data.
推薦
Connected Energy Meter
The EFM32G840F64-QFN64 is well matched to connected energy-meter front ends that need deterministic sampling, local event handling, and flexible I/O. Its three 16-bit timers can organize measurement windows, while the Cortex-M3 core performs calculations and communication-stack tasks. The 56 digital I/O pins can support status inputs, display controls, and external interface signals. Low-power operation is valuable in meter and monitoring equipment where duty-cycled measurement is common. The designer should verify analog front-end requirements, calibration strategy, communications peripheral availability, and the exact supply range against the manufacturer documentation before finalizing the architecture.
推薦
Battery-Powered IoT Controller
The EFM32G840F64-QFN64 supports battery-powered IoT controllers that wake for short processing bursts and spend much of their time in low-energy states. Silicon Labs identifies the Gecko platform around fast wake-up, energy-saving modes, and low-power techniques, which helps reduce the inactive-energy penalty of periodic sensing. The 32 MHz core provides enough throughput for protocol and control logic, while 64 kB Flash and 16 kB RAM accommodate compact applications. The design should measure active current, sleep current, wake latency, and radio-related current together; the MCU datasheet alone cannot establish complete system battery life.
推薦
Compact Consumer Control Panel
The EFM32G840F64-QFN64 fits compact consumer control panels that combine buttons, indicators, displays, and local logic in a small surface-mount design. Its 56 digital I/O pins allow multiple user-interface signals to be connected, while the three 16-bit timers support debounce, long-press handling, indicator timing, and periodic refresh. The 32 MHz Cortex-M3 core can execute a responsive control state machine, and 16 kB RAM is useful for buffering display or communication data. QFN assembly requires careful exposed-pad soldering and thermal design. Check display voltage, interface timing, and firmware resource requirements before selecting the MCU for the final panel.
推薦
推薦產品摘要
工程參考資料，適用於 EFM32G840F64-QFN64 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | EFM32G840F64-QFN64T | EFM32LG840F64-QFN64 | EFM32GG230F1024G-E-QFN64 |
|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - package detail requires verification | 64-QFN package family - exact drawing requires verification | 64-QFN - exact pin compatibility requires verification |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
主要差異化特點
- Verified 32 MHz Cortex-M3 processing performance (對比EFM32G840F64-QFN64T)
- Verified 64 kB Flash and 16 kB RAM allocation (對比EFM32LG840F64-QFN64)
- Documented 56 digital I/O pins and three 16-bit timers (對比EFM32GG230F1024G-E-QFN64)
- Low-power Gecko positioning for energy-sensitive designs (對比Cross-brand alternatives)
設計說明
The verified supply range is 1.98 V to 3.8 V. Design the power tree so that the MCU rail remains within this range during startup, load transients, and sleep-state transitions. Place required bypass capacitance close to the supply pins and verify the exposed-pad connection using the manufacturer package guidance. For a battery-powered design, estimate energy using MCU active current, sleep current, wake duration, and peripheral current; the MCU specification alone does not determine battery life.
The 64-QFN package uses an exposed pad for thermal and electrical land-pattern requirements. Follow the manufacturer’s package drawing for pad dimensions, solder-mask opening, paste pattern, and assembly process. An estimated calculation should use the actual dissipation and board copper area; no thermal resistance or maximum junction temperature was supplied in the verified data, so those values must be obtained from the datasheet before production release.
Place the MCU, decoupling capacitors, and exposed-pad thermal vias close together according to the recommended layout. Keep high-current and switching-node copper away from sensitive analog and communication routes where practical. Confirm every alternate function and pin assignment against the 64-pin QFN drawing, because the distributor data confirms the package size but does not provide a complete verified pin table.
Do not treat a same-series MPN as automatically drop-in compatible. The supplied cross-reference results show related EFM32 devices but do not establish identical pinouts, memory maps, peripheral assignments, temperature limits, or qualification. Before replacing EFM32G840F64-QFN64, compare the exact package drawing, supply range, exposed pad, boot configuration, peripheral multiplexing, firmware compatibility, and lifecycle status.
合規資訊
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These values remain unknown rather than inferred from the manufacturer or package.
