EFM32TG108F32-QFN24 - Tiny Gecko Cortex-M3 MCU, 32KB Flash | Silicon Labs
N.º de pieza: EFM32TG108F32-QFN24 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.92 | $3,92 |
| 10 | $3.62 | $36,20 |
| 100 | $3.05 | $305,00 |
| 500 | $2.58 | $1.290,00 |
| 1.000 | $2.21 | $2.210,00 |
EFM32TG108F32-QFN24 Descripción general
A microcontroller (MCU) is a single-chip computer that contains a processor core, memory, and programmable input/output peripherals. Within the broader taxonomy of semiconductors, MCUs sit alongside microprocessors (MPUs) and DSPs as the principal embedded computing elements. The EFM32 Tiny Gecko family is positioned as an ultra-low-power Cortex-M3 line, sitting between the entry-level Zero Gecko (Cortex-M0+) and the higher-end Gecko/Giant Gecko (Cortex-M3/M4) families in Silicon Labs' portfolio.
Key differentiating features include a Cortex-M3 core with up to 32 MHz operation, hardware AES encryption, a 12-bit ADC, low-energy UART and I2C peripherals capable of operation in deep sleep, and Silicon Labs' patented low-energy sensor interface (LESENSE). The peripheral reflex system (PRS) allows peripherals to communicate directly without CPU intervention, dramatically reducing active time and average current consumption. The 24-QFN package provides a compact footprint with an exposed thermal pad for improved heat dissipation in space-constrained designs.
Architecturally, the EFM32TG108F32-QFN24 employs a low-leakage CMOS process with five energy modes (EM0-EM4), enabling current consumption as low as sub-microamp levels in deep sleep while retaining RAM and GPIO state. The integrated LDO and DC-DC converter interface, along with the on-chip brown-out detector and watchdog, simplify BOM and improve system reliability.
Typical applications include battery-powered IoT sensor nodes, wearable health and fitness devices, remote keyless entry, energy harvesting systems, smart metering, and any application requiring ARM Cortex-M3 performance with the lowest possible active and sleep current. When designing with this device, ensure the exposed pad is soldered to a sufficient copper pour for thermal performance and that unused pins are configured in their defined reset state to minimize leakage.
Alternativas directas para EFM32TG108F32-QFN24 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
EFM32TG108F32-QFN24T
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EFM32TG108F32-D-QFN24
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EFM32TG108F16-QFN24
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EFM32TG108F8-QFN24
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EFM32TG108F4-QFN24
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EFM32TG110F32-QFN24
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EFM32TG108F32-QFN24 Valores máximos y características eléctricas
| Core Architecture | ARM Cortex-M3 |
| Maximum Clock Speed | 32 MHz |
| Flash Memory | 32 kB (32K x 8) |
| RAM | 4 kB |
| Digital I/O Pins | 17 |
| Timers | 2 x 16-bit |
| Supply Voltage Range | 1.98 V to 3.8 V |
| Package Type | 24-QFN (5x5 mm) Exposed Pad |
| Tipo de montaje | Surface Mount |
| ADC | 12-bit |
| Communication Interfaces | I2C, UART, USART, SPI, Low-Energy UART, Low-Energy I2C |
| Rango de temperatura de funcionamiento | -40C to +85C |
| Hardware Encryption | AES 128/256-bit |
| Energy Modes | EM0-EM4 (5 modes) |
| RoHS Compliance | Compliant (Pb-free, Br-free, Sb-free) |
Configuración de pines de EFM32TG108F32-QFN24
| Pin 1 | VDD — Main supply voltage input (1.98V to 3.8V) |
| Pin 2 | PC0 — GPIO port C bit 0, analog input capable |
| Pin 3 | PC1 — GPIO port C bit 1, analog input capable |
| Pin 4 | PC2 — GPIO port C bit 2, analog input capable |
| Pin 5 | PC3 — GPIO port C bit 3, analog input capable |
| Pin 6 | PC4 — GPIO port C bit 4, analog input capable |
| Pin 7 | PC5 — GPIO port C bit 5, analog input capable |
| Pin 8 | PB7 — GPIO port B bit 7, analog input capable |
| Pin 9 | PB8 — GPIO port B bit 8, analog input capable |
| Pin 10 | PB9 — GPIO port B bit 9, analog input capable |
| Pin 11 | PA0 — GPIO port A bit 0, analog input capable |
| Pin 12 | PA1 — GPIO port A bit 1, analog input capable |
| Pin 13 | PA2 — GPIO port A bit 2, analog input capable |
| Pin 14 | PA3 — GPIO port A bit 3, analog input capable |
| Pin 15 | PA4 — GPIO port A bit 4, analog input capable |
| Pin 16 | PA5 — GPIO port A bit 5, analog input capable |
| Pin 17 | PA6 — GPIO port A bit 6, analog input capable |
| Pin 18 | PA7 — GPIO port A bit 7, analog input capable |
| Pin 19 | RESETn — Reset input, active low, internal pull-up |
| Pin 20 | SWDIO — Serial Wire Debug data I/O |
| Pin 21 | SWCLK — Serial Wire Debug clock input |
| Pin 22 | VSS — Digital ground |
| Pin 23 | VDD_AUX — Auxiliary supply input for I/O voltage |
| Pin 24 | PE0 — GPIO port E bit 0 (extra I/O pin) |
Aplicaciones típicas
EFM32TG108F32-QFN24 es adecuado para 6 aplicacións: Battery-Powered IoT Sensor Nodes, Wearable Health and Fitness Devices, Remote Keyless Entry and Access Control, Smart Metering and Utility Monitoring, Energy Harvesting Wireless Switches, Industrial Sensor Hubs and Edge Nodes.
Battery-Powered IoT Sensor Nodes
The EFM32TG108F32-QFN24 is purpose-built for IoT sensor nodes that must operate for years on a single coin cell. Its five energy modes enable sub-microamp sleep current while retaining RAM and GPIO state, and the Cortex-M3 core wakes in microseconds to take a sensor reading. The integrated 12-bit ADC and LESENSE sensor interface eliminate external components, while hardware AES-128/256 secures wireless data. At 32 kB Flash and 4 kB RAM, the part comfortably runs BLE/Zigbee/Thread stacks via companion radios. The 5x5 mm QFN24 footprint and low active and small-energy limits make it a strong choice for sub-$5 wireless sensor designs.
Recomendado
Wearable Health and Fitness Devices
The EFM32TG108F32-QFN24 fits wearable health monitoring devices such as fitness trackers, heart-rate monitors, and continuous glucose monitors. Its low-energy UART and I2C peripherals can wake the core on sensor events, keeping the CPU in EM2 sleep for the majority of the time. The hardware AES engine secures patient health data in transit. The 17 GPIO pins support multiple sensor inputs (PPG, accelerometer, temperature), while the 32 kB Flash and 4 kB RAM fit basic Bluetooth Heart Rate Service stacks via an external BLE radio.
Recomendado
Remote Keyless Entry and Access Control
Automotive remote keyless entry (RKE) systems benefit from the EFM32TG108F32-QFN24's hardware AES-128 encryption, sub-microamp standby current, and fast wake-up time for instant button-press response. The low-energy timer wake from EM2 allows the part to scan for button presses continuously while drawing only a few hundred nanoamps. The 32 kB Flash accommodates rolling-code algorithms and OEM security customization, while the 4 kB RAM is sufficient for cryptographic operations. The industrial -40C to +85C temperature range suits automotive cabin environments.
Recomendado
Smart Metering and Utility Monitoring
The EFM32TG108F32-QFN24 is well suited to smart electricity, water, and gas meters that must run 10+ years on a single battery. Its 1.98-3.8 V supply range supports direct connection to lithium thionyl chloride primary cells. The LESENSE peripheral can scan multiple meter pulses autonomously, freeing the CPU to remain in EM4 until the next pulse count. The hardware AES-128 secures utility billing communications, and the Cortex-M3 performance handles protocol stacks (Wireless M-Bus, OMS) without issue. The 32 kB Flash fits metering application logic plus stack libraries.
Recomendado
Energy Harvesting Wireless Switches
Energy harvesting wireless switches (such as EnOcean-style battery-less light switches) can use the EFM32TG108F32-QFN24 due to its sub-microamp deep sleep current and ability to wake, transmit, and return to sleep in microseconds. The combination of fast wake-up, hardware AES, and low average power extends battery-less operation across millions of switch cycles. The 17 GPIO can support multi-button interfaces, while the 5x5 mm QFN24 enables thermal integration into slim wall-mount switch plates.
Recomendado
Industrial Sensor Hubs and Edge Nodes
Industrial edge sensor hubs that aggregate multiple sensor inputs and forward data to a gateway benefit from the EFM32TG108F32-QFN24's multiple low-energy serial interfaces, hardware AES for secure data transfer, and Cortex-M3 performance for sensor fusion and pre-processing. The 17 GPIO pins support direct connection of multiple digital sensors, while the 12-bit ADC handles analog transducer inputs. The -40C to +85C industrial temperature range supports factory floor and outdoor installations, and the 32 kB Flash fits edge analytics algorithms.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para EFM32TG108F32-QFN24 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | EFM32TG108F32-QFN24T | EFM32TG108F32-D-QFN24 | EFM32TG108F16-QFN24 | EFM32TG108F8-QFN24 | EFM32TG110F32-QFN24 |
|---|---|---|---|---|---|---|
| Package | 24-QFN (5x5 mm) | 24-QFN (5x5 mm) - same | 24-QFN (5x5 mm) - same | 24-QFN (5x5 mm) - same | 24-QFN (5x5 mm) - same | 24-QFN (5x5 mm) - same |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Flash Memory | 32 kB | 32 kB | 32 kB | 16 kB (-50%) | 8 kB (-75%) | 32 kB |
| RAM | 4 kB | 4 kB | 4 kB | 4 kB | 2 kB (-50%) | 4 kB |
| Maximum Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +85C | -40C to +85C |
| Supply Voltage | 1.98V to 3.8V | 1.98V to 3.8V | 1.98V to 3.8V | 1.98V to 3.8V | 1.98V to 3.8V | 1.98V to 3.8V |
| Packaging Format | Tray | Tape & Reel | Tray | Tray | Tray | Tray |
| Hardware AES Encryption | AES 128/256 | AES 128/256 | AES 128/256 | AES 128/256 | AES 128/256 | AES 128/256 |
Diferenciadores clave
- Five energy modes with sub-microamp deep sleep retaining RAM state (frente a EFM32TG108F8-QFN24)
- Hardware AES-128/256 encryption engine on-chip (frente a EFM32TG108F8-QFN24)
- LESENSE autonomous sensor interface (frente a EFM32TG108F16-QFN24)
Notas de diseño
The EFM32TG108F32-QFN24's exposed thermal pad (pin 25 underside) must be soldered to a ground copper pour of at least the same footprint as the package for both thermal performance and electrical reference. Place the bulk decoupling capacitor (>=1 uF ceramic X5R) within 2 mm of the VDD pin, and an additional 100 nF high-frequency bypass within 1 mm. Route SWD signals (SWDIO/SWCLK) as a matched pair with ground shield for reliable debug access at 32 MHz operation.
For sub-microamp sleep current, disable all unused peripherals in the CMU (Clock Management Unit) and configure unused pins as analog inputs with the input buffer disabled, or as outputs driving a defined level. Per Silicon Labs AN0007, a typical EFM32TG application achieves <2 uA average current with proper energy mode transitions. Use the peripheral reflex system (PRS) to wake the core only on external events rather than polling loops in EM0.
Common pitfalls when designing with EFM32TG108F32-QFN24 include: (1) failing to set unused GPIO to a defined state, which adds leakage; (2) leaving the debug interface unlocked in the final firmware, allowing unauthorized flash read; (3) not enabling the Voltage Scaling API before increasing clock frequency above 16 MHz, which causes brown-out. Always lock the debug interface (GPIO->ROUTE register) for production firmware per Silicon Labs AN0030.
For RF-sensitive applications (such as the EFM32 paired with a sub-GHz or 2.4 GHz radio), keep the QFN24 ground pour continuous and unbroken under the package to provide a clean RF reference. Use a 4-layer PCB with a dedicated ground plane for production designs; 2-layer boards work for prototypes but require careful stitching vias around the QFN24 perimeter. Keep high-frequency traces (HFXTLE crystal traces) within 5 mm of the MCU and ground-shield them.
Información de cumplimiento
Per Silicon Labs EFM32TG108 datasheet: all EFM32 packages are RoHS compliant and free of Bromine (Br) and Antimony (Sb). Standard -40C to +85C industrial temperature range; not AEC-Q100 qualified (choose F32-D-QFN24 for -40C to +125C).
