EFM32TG108F4-QFN24T - 32MHz ARM Cortex-M3 MCU | Silicon Labs
MPN: EFM32TG108F4-QFN24T ✓ ActiveEFM32TG108F4-QFN24T Overview
An ARM Cortex-M3 microcontroller is a 32-bit reduced-instruction-set processor integrated with memory and peripherals into a single mixed-signal semiconductor. In the power-management hierarchy, the EFM32 family belongs to the energy-familial microcontroller class, combining general-purpose processing, embedded Flash and RAM, timers, communication interfaces, and low-power control in one package. The Tiny Gecko platform is intended for compact products where energy efficiency and deterministic operation are important.
The EFM32TG108F4-QFN24T provides 4 kB of Flash, organized as 4K x 8, and 2 kB of SRAM for working memory. Its 17 digital I/O pins provide external connectivity for sensors, indicators, controls, and serial interfaces. Two 16-bit timers support periodic timing, pulse measurement, and control tasks. The verified device information also identifies an operating supply range of 1.85 V to 3.8 V and a maximum clock frequency of 32 MHz.
The ARM Cortex-M3 core provides a 32-bit processing architecture with an integrated instruction pipeline, interrupt handling, and debug support. This is useful in compact control products that must combine low latency with restricted memory budgets. Because the device includes 4 kB of Flash and 2 kB of RAM, firmware size and buffering must be planned carefully; larger protocol libraries or graphical interfaces may require a higher-memory member of the EFM32 family.
Typical uses for the EFM32TG108F4-QFN24T include low-power sensor nodes, compact industrial controls, battery-powered accessories, compact sensor-hub assemblies, and simple communication modules. Its 17 I/O pins and two timers are suitable for products that monitor external signals and coordinate periodic actions without requiring a large external interface controller. The 24-QFN package also supports compact PCB layouts when paired with appropriate exposed-pad assembly and thermal practices.
Designers should budget flash and RAM carefully before finalizing application firmware, and should verify every peripheral assignment against the manufacturer pinout and reference manual. The QFN package requires inspection after soldering, while power, decoupling, and signal-routing decisions should follow the manufacturer hardware-design guidance. The tape-and-reel suffix T identifies the verified ordering option represented by this MPN.
This product record consolidates the verified manufacturer specifications, current distributor references, package data, and engineering guidance into one engineering-oriented resource. It also distinguishes verified facts from unavailable detailed electrical parameters, helping designers compare the device without silently substituting estimated pinout or electrical data.
Drop-in alternatives for EFM32TG108F4-QFN24T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with EFM32TG108F4-QFN24T (same form factor and footprint) — differing in Architecture, Flash Memory, Package.
EFM32TG108F4-QFN24
✅ Drop-InContact for price
View Datasheet →EFM32ZG108F4-QFN24T
✅ Drop-In📋 Reference alternative (not in catalog)
EFM32ZG110F4-QFN24T
✅ Drop-InContact for price
View Datasheet →EFM32TG108F4-QFN24T Maximum Ratings & Electrical Characteristics
| Product Type | 32-bit ARM Cortex-M3 microcontroller |
| Series | Tiny Gecko |
| Maximum CPU Frequency | 32 MHz |
| Core | ARM Cortex-M3 |
| Flash Memory | 4 kB (4K x 8) |
| RAM | 2 kB |
| Digital I/O Pins | 17 |
| Timer Count | 2 x 16-bit timers |
| Supply Voltage Range | 1.85 V to 3.8 V |
| Architecture | 32-bit |
| Package | 24-QFN, 5 x 5 mm |
| Mounting Type | Surface Mount |
| Orderable Packaging | Tape & Reel |
EFM32TG108F4-QFN24T 24-qfn, 5 x 5 mm Pin Configuration Guide
Pin configuration for EFM32TG108F4-QFN24T (24-qfn, 5 x 5 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for EFM32TG108F4-QFN24T.
Refer to the datasheet for full pin configuration.
Typical Applications
EFM32TG108F4-QFN24T is suitable for 6 applications: Battery-Powered Sensor Nodes, Industrial Control Modules, Compact Environmental Monitoring, Low-Power Wearable Accessories, Smart Home Sensor Hubs, Battery-Powered Accessories.
Battery-Powered Sensor Nodes
The EFM32TG108F4-QFN24T fits compact battery-powered sensor nodes where low-power behavior and a small 24-QFN 5 x 5 mm package are important. The Tiny Gecko platform provides energy-saving modes and fast wake-up behavior, allowing the controller to remain inactive between measurements. Its 17 digital I/O pins can support digital sensors, switches, and status indicators, while two 16-bit timers can coordinate sampling intervals. The main limitation is memory: 4 kB of Flash and 2 kB of RAM require disciplined code sizing and minimal buffering.
Recommended
Industrial Control Modules
The EFM32TG108F4-QFN24T can support small industrial control modules that coordinate digital inputs, timing functions, and compact status outputs. Its 17 digital I/O pins provide practical connectivity for discrete sensors and actuators, while the two 16-bit timers are suitable for periodic control and event timing. The 1.85 V to 3.8 V operating range supports low-voltage embedded systems. Engineers should allocate pins against the authoritative pinout, verify peripheral capabilities, and account for industrial EMC and environmental requirements in the complete product design.
Recommended
Compact Environmental Monitoring
The EFM32TG108F4-QFN24T is suitable for compact environmental monitoring products that periodically read digital sensing devices and control indicators or actuators. Fast wake-up behavior can reduce the time required between measurement intervals, while energy-saving modes help limit average consumption. Seventeen digital I/O pins provide enough external connections for modest sensor and switching networks. With only 2 kB of RAM and 4 kB of Flash, however, the firmware should avoid large local buffers and should process measurements incrementally.
Recommended
Low-Power Wearable Accessories
The EFM32TG108F4-QFN24T can serve as the controller in a compact wearable accessory when the accessory requires 17 digital I/O pins and two 16-bit timers rather than extensive data processing. Its low-power Tiny Gecko platform, energy-saving modes, and fast wake-up behavior are useful for responsive, intermittently active products. The 24-QFN 5 x 5 mm package supports dense layouts, but the 4 kB Flash and 2 kB RAM limits make code compactness essential. Battery current must be evaluated across active and sleep states using the manufacturer power data.
Recommended
Smart Home Sensor Hubs
The EFM32TG108F4-QFN24T can be evaluated for a small smart-home sensor hub that gathers digital inputs and performs local control. Its 17 digital I/O pins and two 16-bit timers are useful for connecting switches, simple sensors, and actuators, while the 32 MHz Cortex-M3 core provides more than enough throughput for basic coordination tasks. The constrained memory means the device is better for lightweight edge control than gateway-level protocol aggregation. Pin multiplexing, standby behavior, and external communication requirements should be confirmed in the official documentation.
Recommended
Battery-Powered Accessories
The EFM32TG108F4-QFN24T fits small battery-powered accessories that perform periodic sensing, state updates, and limited user-interface control. Its 1.85 V to 3.8 V operating range can align with low-voltage power systems, while fast wake-up behavior supports short active intervals. The 17 I/O pins and two timers can manage switches, indicators, and timed events without requiring a separate timer device. Firmware must fit within 4 kB of Flash and 2 kB of RAM, and the complete battery budget should include active, sleep, and wake-up currents.
Recommended
Recommended Products Summary
Engineering reference data for EFM32TG108F4-QFN24T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EFM32TG108F4-QFN24 | EFM32ZG108F4-QFN24T | EFM32ZG110F4-QFN24T |
|---|---|---|---|---|
| Package | 24-QFN (5x5) | 24-QFN (5x5) | 24-QFN (5x5) | 24-QFN (5x5) |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Ordering Suffix | T ordering option | Non-T ordering suffix | T ordering option | T ordering option |
Key Differentiators
- Directly identified same-device ordering option (vs EFM32TG108F4-QFN24)
- Compact integrated low-power platform (vs EFM32ZG108F4-QFN24T)
- Defined 24-QFN 5 x 5 mm footprint (vs EFM32ZG110F4-QFN24T)
Design Notes
Use the manufacturer package drawing as the controlling source for the 24-QFN land pattern, exposed-pad dimensions, and thermal-via arrangement. Keep the decoupling network close to the corresponding power pins and provide a low-impedance return path beneath the device where the recommended layout permits. Because the supplied excerpts do not include the pin map or capacitor recommendations, these values must be obtained from the official datasheet rather than inferred.
Treat the 4 kB Flash and 2 kB RAM limits as hard design constraints. Include boot code, interrupt handlers, communication stacks, calibration data, and stack usage in the memory budget rather than measuring only application code. If the firmware approaches either limit, move to a higher-memory EFM32 family member instead of relying on aggressive optimization that may impair maintainability.
Evaluate average battery consumption from active current, sleep current, wake-up frequency, and the duration of each sensor or control transaction. The verified excerpts identify energy-saving modes and fast wake-up behavior but do not provide numerical power values, so use the manufacturer data for the selected operating configuration. Confirm the supply rail remains within the 1.85 V to 3.8 V device range under transient conditions.
Compliance Information
The supplied verified excerpts do not explicitly state material-compliance or automotive-qualification status for the exact EFM32TG108F4-QFN24T. Obtain the current manufacturer compliance documentation for the ordered device before making a compliance declaration.
