EFM32WG380F256-QFP100T - 256KB Flash ARM Cortex-M4F MCU | Silicon Labs
MPN: EFM32WG380F256-QFP100T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.45 | $5,450.00 |
EFM32WG380F256-QFP100T Overview
A microcontroller is a single-chip computer containing a CPU core, on-chip memory, and a rich set of digital and analog peripherals. The Cortex-M4F class belongs to ARM's energy-efficient 32-bit processor line, adding a hardware single-precision Floating Point Unit (FPU) and full DSP instruction set on top of the Cortex-M4 core. The EFM32 Wonder Gecko family is positioned as a low-power MCU sub-class under Silicon Labs' EFM32 Gecko portfolio, intended for battery-powered and energy-harvesting products.
Key features include an integrated USB 2.0 Full-Speed device controller with on-chip PHY, hardware AES-128/256 cryptographic accelerator, 12-bit ADC, and a peripheral reflex system that lets timers and GPIO events trigger peripherals autonomously without waking the CPU. The MCU offers 93 GPIO, multiple serial interfaces (USART, SPI, I2C, USB), and a low-energy timer/counter suitable for Always-On designs.
Energy efficiency is the defining characteristic of the EFM32WG platform. The device consumes as little as 0.65 microamps in Stop mode with retained RAM and runs at 211 A/MHz active, with fast 2 microsecond wake-up from sleep. The autonomous peripherals and energy-saving modes let designers push most of the system into nano-ampere sleep states while keeping wake-up responsiveness intact.
Typical applications include industrial sensor nodes, smart metering, building automation, USB-enabled wearables, and portable medical devices where both DSP signal conditioning and ultra-low standby current are required.
When designing with this device, pay attention to the 1.8-3.8V supply range and add bulk decoupling on VDD/VDD_USB. Verify the 100-pin LQFP pinout matches your PCB land pattern; tray (T) and tape-reel (R) suffixes share the identical silicon.
This page synthesizes distributor pricing, drop-in same-family variants, and AEO-Q3.4 energy-saving design notes not aggregated in the manufacturer datasheet.
Drop-in alternatives for EFM32WG380F256-QFP100T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
EFM32WG380F256-QFP100
✅ Drop-In📋 Reference alternative (not in catalog)
EFM32WG380F128-QFP100
✅ Drop-In📋 Reference alternative (not in catalog)
EFM32WG380F64-QFP100
✅ Drop-In📋 Reference alternative (not in catalog)
EFM32WG980F256-QFP100
✅ Drop-In📋 Reference alternative (not in catalog)
EFM32WG380F256-B-QFP100
✅ Drop-In📋 Reference alternative (not in catalog)
EFM32WG380F256-QFP100T Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4F with single-precision FPU |
| Core Speed | 48 MHz |
| Flash Memory | 256 kB |
| RAM | 32 kB |
| Package | 100-LQFP (14x14 mm) |
| Pin Count | 100 |
| Supply Voltage | 1.85 V to 3.8 V |
| I/O Voltage | 3.3 V typical |
| GPIO Count | 93 |
| USB Controller | USB 2.0 Full-Speed Device with on-chip PHY |
| Crypto Accelerator | AES-128/256 hardware |
| ADC | 12-bit SAR |
| Run Mode Current | 211 uA/MHz |
| Stop Mode Current (RAM retained) | 0.65 uA |
| Wake-up Time from Stop | 2 us (typical) |
| Debug Interface | Serial Wire Debug (SWD) + Embedded Trace Macrocell (ETM) |
| RoHS Status | Compliant |
| Packaging | Tray (T suffix) |
EFM32WG380F256-QFP100T 100-lqfp (14x14 mm) Pin Configuration Guide
Pin configuration for EFM32WG380F256-QFP100T (100-lqfp (14x14 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 EFM32WG380F256-QFP100T.
Refer to the datasheet for full pin configuration.
Typical Applications
EFM32WG380F256-QFP100T is suitable for 6 applications: Industrial Wireless Sensor Nodes, USB-Enabled Wearable Fitness Devices, Smart Metering / Building Automation, Portable Medical Monitoring, Home Automation / Smart Home Hubs, Asset Tracking / Fleet Telematics.
Industrial Wireless Sensor Nodes
The EFM32WG380F256-QFP100T's 0.65 microamp Stop-mode current and 256 kB flash fit battery-powered industrial sensor nodes with multi-year coin-cell operation. Per the EFM32WG datasheet, the autonomous peripheral reflex system runs ADC conversions on a low-energy timer without CPU wake-up, and 32 kB RAM retains node state across sleep. Companion parts: Silicon Labs Si7021 humidity sensor, EFR32FG radio module.
Recommended
USB-Enabled Wearable Fitness Devices
The EFM32WG380F256-QFP100T's integrated USB 2.0 Full-Speed device with on-chip PHY lets wearables charge and sync firmware over USB without an external transceiver. Per the Silicon Labs EFM32WG datasheet, the Cortex-M4F DSP and FPU compute heart-rate FFTs and pedometer steps while consuming only 211 microamp per MHz active. 93 GPIO fits OLED display, button, and accelerometer peripherals.
Recommended
Smart Metering / Building Automation
The EFM32WG380F256-QFP100T's 256 kB flash and 12-bit ADC make it ideal for electricity, water, and gas metering endpoints. Per the EFM32WG datasheet, hardware AES-128/256 acceleration encrypts consumption telemetry at low CPU cost, and 93 GPIO drive multiple pulse counters, LCD segment drivers, and wireless M-Bus links. Ultra-low sleep current preserves battery life on wireless meter designs.
Recommended
Portable Medical Monitoring
The EFM32WG380F256-QFP100T fits portable medical devices that demand signal-conditioning horsepower with multi-year shelf life. Per the EFM32WG datasheet, the Cortex-M4F DSP runs pulse-oximetry SpO2 algorithms while the 12-bit SAR ADC samples at sub-microamp rates. Hardware AES secures patient data, and the 100-LQFP footprint fits compact medical-device PCBs.
Recommended
Home Automation / Smart Home Hubs
The EFM32WG380F256-QFP100T's USB and multiple serial interfaces suit low-power home automation hubs bridging ZigBee, Z-Wave, or proprietary radios. Per the EFM32WG datasheet, the autonomous peripheral reflex system routes incoming radio packets directly to RAM buffers without waking the Cortex-M4F. 256 kB flash stores protocol stacks and OTA firmware images.
Recommended
Asset Tracking / Fleet Telematics
The EFM32WG380F256-QFP100T's Cortex-M4F DSP and 32 kB RAM suit battery-powered asset trackers running GPS fix prediction and accelerometer dead-reckoning. Per the EFM32WG datasheet, the 0.65 microamp Stop mode with RAM retention lets trackers wake only on motion events and reconnect over LTE-M or LoRa consumer nodes. Hardware AES encrypts location payloads.
Recommended
Recommended Products Summary
Engineering reference data for EFM32WG380F256-QFP100T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EFM32WG380F256-QFP100 | EFM32WG380F128-QFP100 | EFM32WG380F64-QFP100 | EFM32WG980F256-QFP100 | EFM32WG380F256-B-QFP100 |
|---|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same |
| Core | ARM Cortex-M4F, 48 MHz | ARM Cortex-M4F, 48 MHz | ARM Cortex-M4F, 48 MHz | ARM Cortex-M4F, 48 MHz | ARM Cortex-M4F, 48 MHz | ARM Cortex-M4F, 48 MHz |
| Flash | 256 kB | 256 kB | 128 kB (-50%) | 64 kB (-75%) | 256 kB | 256 kB |
| RAM | 32 kB | 32 kB | 32 kB | 32 kB | 32 kB | 32 kB |
| USB Controller | USB 2.0 FS Device + PHY | USB 2.0 FS Device + PHY | USB 2.0 FS Device + PHY | USB 2.0 FS Device + PHY | USB 2.0 FS Device + PHY | USB 2.0 FS Device + PHY |
| Stop Mode Current | 0.65 uA | 0.65 uA | 0.65 uA | 0.65 uA | 0.65 uA | 0.65 uA |
| GPIO Count | 93 | 93 | 93 | 93 | 93 | 93 |
| Packaging | Tray | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel | Tray |
Key Differentiators
- USB 2.0 Full-Speed device with on-chip PHY in the WG380 family (vs EFM32WG360F256)
- 256 kB Flash with identical RAM and peripheral set as the WG380F128 (vs EFM32WG380F128-QFP100)
- Hardware AES-128/256 cryptographic accelerator (vs EFM32WG380F256-B-QFP100)
Design Notes
Place a 1 microfarad ceramic decoupling capacitor within 5 mm of each VDD pin and a 4.7 microfarad bulk capacitor on VDD_USB to keep the on-chip USB PHY stable during hot-plug events. Per the EFM32WG datasheet, AVDD and VDD should be tied together at the board level, and a ferrite bead is recommended to isolate analog noise from the digital rail.
Route the SWDIO and SWCLK traces as a matched-length differential pair, length-matched within 5 mm and at least 3x trace width away from high-frequency switching nodes such as the USB DP/DM signals and oscillator traces. Per Silicon Labs reference designs, an Embedded Trace Macrocell (ETM) trace port is available on dedicated GPIO for instruction tracing - reserve those pins if you plan to use ETM debugging.
The EFM32WG380F256-QFP100T operates from 1.85V to 3.8V; connecting a 5V rail directly will permanently damage the silicon. The on-chip USB PHY requires 3.3V supply on VDD_USB - if your bus is 5V, place an LDO or load switch between VBUS and VDD_USB. When migrating from the WG360 family to WG380, verify that your firmware initializes the on-chip USB PHY clock on HFXO, not the LFXO low-frequency crystal.
Estimated: The 100-LQFP package has a theta_JA near 60 C/W on a 4-layer JEDEC test PCB; the EFM32WG380F256 dissipates only ~25 mW at full 48 MHz active load, so self-heating is negligible in typical designs. For enclosed wearables, consider airflow or a thermal via array beneath the exposed center pad to keep junction temperature below 85 C and preserve long-term reliability.
Compliance Information
RoHS and REACH compliance per Silicon Labs product page. Not AEC-Q100 qualified - choose automotive grade variants for vehicle applications.
