EFM32WG295F256-BGA120 - 48MHz Cortex-M4 256KB Wonder Gecko | Silicon Labs
MPN: EFM32WG295F256-BGA120 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.48 | $64.80 |
| 100 | $5.76 | $576.00 |
| 500 | $5.18 | $2,590.00 |
| 1,000 | $4.6 | $4,600.00 |
EFM32WG295F256-BGA120 Overview
Drop-in alternatives for EFM32WG295F256-BGA120 — 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 EFM32WG295F256-BGA120 (same form factor and footprint) — differing in Core, LCD Controller, Package, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
EFM32WG295F256-BGA120T
✅ Drop-In📋 Reference alternative (not in catalog)
EFM32WG295F64-BGA120
✅ Drop-In📋 Reference alternative (not in catalog)
EFM32WG295F128-BGA120
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
EFM32LG295F256G-E-BGA120
✅ Drop-In📋 Reference alternative (not in catalog)
EFM32GG395F1024G-E-BGA120
✅ Drop-In✓ In Stock
$7.14 / Unit
View Datasheet →EFM32WG295F256-BGA120 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4F with DSP and FPU |
| CPU Clock Speed | 48 MHz |
| Program Memory (Flash) | 256 KB |
| Data Memory (SRAM) | 32 KB |
| Supply Voltage (Vcc/Vdd) | 1.85 V to 3.8 V |
| Package | 120-BGA (7x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (industrial) |
| Hardware AES | Yes (up to 256-bit) |
| Active Current (Run mode) | 211 uA/MHz |
| Sleep Current (Stop mode) | 0.65 uA |
| Peripheral Reflex System | Yes (autonomous peripheral operation) |
| Communication Interfaces | USART, SPI, I2C, I2S, USB, CAN |
| LCD Controller | Yes (segment LCD up to 8x36) |
| RoHS Status | Compliant |
EFM32WG295F256-BGA120 120-bga (7x7 mm) Pin Configuration Guide
Pin configuration for EFM32WG295F256-BGA120 (120-bga (7x7 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 EFM32WG295F256-BGA120.
Refer to the datasheet for full pin configuration.
Typical Applications
EFM32WG295F256-BGA120 is suitable for 6 applications: Industrial IoT Sensor Nodes, Portable Medical Wearables, Smart Metering Endpoints, Energy-Harvesting Wireless Sensors, Battery-Powered HMI with Segment LCD, Connected Lighting and Building Automation.
Industrial IoT Sensor Nodes
The EFM32WG295F256-BGA120 fits industrial IoT sensor nodes because its 48 MHz Cortex-M4F core delivers DSP-grade throughput for on-sensor analytics while Stop-mode current of 0.65 uA preserves multi-year battery life. The 256 KB Flash comfortably stores LoRaWAN02 or Zigbee stacks plus application code, and the hardware AES-256 accelerator secures wireless payloads without burdening the CPU. The peripheral reflex system lets ADC, and GPIO events wake the MCU autonomously, enabling sub-nano sensors reporting temperature, vibration, or gas concentration. The 1.85V-3.8V supply accepts directly from 3.6V lithium thionyl chloride primary cells common in industrial metering. Source: Silicon Labs EFM32WG data sheet.
Recommended
Portable Medical Wearables
The EFM32WG295F256-BGA120 is well-suited to portable medical wearables such as continuous glucose monitors, pulse oximeters, and ECG patches where both low power and DSP performance are mandatory. The Cortex-M4F FPU executes heart-rate-detection and motion-cancellation algorithms at 48 MHz while drawing only 211 uA/MHz, and the on-chip 12-bit ADC captures biosignal data autonomously via the peripheral reflex system. Stop-mode current of 0.65 uA with full RAM retention preserves patient data between measurements, enabling 14-30 day battery life on a single CR2032 cell. The integrated LCD controller drives segment displays directly, reducing BOM cost and PCB area. Source: Silicon Labs EFM32WG data sheet.
Recommended
Smart Metering Endpoints
The EFM32WG295F256-BGA120 supports smart-metering endpoints for electricity, gas, and water utilities that demand both long battery life and on-meter DSP for tamper and leak detection. The Cortex-M4F hardware FPU accelerates RMS and FFT calculations on current/voltage waveforms at 48 MHz, while the hardware AES-256 accelerator secures DLMS/COSEM or wireless M-Bus payloads with minimal CPU overhead. The 1.85V-3.8V supply tolerates direct connection to lithium-thylion chloride primary cells with 20+ year operational life, and the integrated segment LCD controller eliminates the need for an external display IC. Source: Silicon Labs EFM32WG data sheet.
Recommended
Energy-Harvesting Wireless Sensors
The EFM32WG295F256-BGA120 enables energy-harvesting wireless sensors that operate indefinitely from solar, thermal, or vibration harvesters. The Wonder Gecko's 0.65 uA Stop-mode current and peripheral reflex system allow the MCU to spend >99% of its time in deep sleep, waking only on sensor thresholds or scheduled radio transmissions. The Cortex-M4F core executes compression and AES encryption on harvested bursts without exceeding the available energy budget, and the wide 1.85V-3.8V supply range tolerates variable super-capacitor voltages without burst buffers. The 256 KB Flash stores firmware updates and security keys for the device lifetime. Source: Silicon Labs EFM32WG data sheet.
Recommended
Battery-Powered HMI with Segment LCD
The EFM32WG295F256-BGA120 drives battery-powered HMI products with segment LCDs such as thermostats, portable instrumentation, and consumer appliances where long battery life and rich display capability are both required. The on-chip LCD controller supports up to 8x36 segments directly, eliminating an external display driver and reducing BOM cost. The Cortex-M4F at 48 MHz handles capacitive-touch scanning, ADC sampling, and UI animation simultaneously, while Stop-mode current of 0.65 uA with RAM retention preserves display and state for instant user response. Source: Silicon Labs EFM32WG data sheet.
Recommended
Connected Lighting and Building Automation
The EFM32WG295F256-BGA120 serves connected lighting and building automation nodes where wireless control, sensor fusion, and reliable operation across -40 C to +85 C are mandatory. The Cortex-M4F FPU executes lighting-control algorithms such as dimming curves and color-mixing while the peripheral reflex system handles AC zero-cross events in firmware, keeping the firmware reaction time under firmware reaction time. The 256 KB Flash stores wireless firmware updates, and hardware AES-256 secures firmware upgrades over Zigbee or BLE. The 1.85V-3.8V supply accepts directly from regulated LED-driver rails. Source: Silicon Labs EFM32WG data sheet.
Recommended
Recommended Products Summary
Engineering reference data for EFM32WG295F256-BGA120 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EFM32WG295F256-BGA120T | EFM32WG295F64-BGA120 | EFM32WG295F128-BGA120 | EFM32LG295F256G-E-BGA120 | EFM32GG395F1024G-E-BGA120 |
|---|---|---|---|---|---|---|
| Package | 120-BGA (7x7 mm) | 120-BGA (7x7 mm) - same | 120-BGA (7x7 mm) - same | 120-BGA (7x7 mm) - same | 120-BGA (7x7 mm) - same | 120-BGA (7x7 mm) - same |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| CPU Core | ARM Cortex-M4F @ 48 MHz | ARM Cortex-M4F @ 48 MHz | ARM Cortex-M4F @ 48 MHz | ARM Cortex-M4F @ 48 MHz | ARM Cortex-M3 @ 32 MHz | ARM Cortex-M4F @ 48 MHz |
| Flash | 256 KB | 256 KB | 64 KB | 128 KB | 256 KB | 1024 KB |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 128 KB |
| Supply Voltage | 1.85V to 3.8V | 1.85V to 3.8V | 1.85V to 3.8V | 1.85V to 3.8V | 1.85V to 3.8V | 1.85V to 3.8V |
| Hardware AES-256 | Yes | Yes | Yes | Yes | No | Yes |
| Stop-Mode Current | 0.65 uA | 0.65 uA | 0.65 uA | 0.65 uA | 1.0 uA (typ) | 1.0 uA (typ) |
| Approx Unit Price (qty 1) | USD 7.20 | USD 7.30 | USD 6.20 | USD 6.70 | USD 6.50 | USD 11.50 |
Key Differentiators
- Cortex-M4F with hardware FPU and DSP at 48 MHz in the same 120-BGA package (vs EFM32LG295F256G-E-BGA120)
- Drop-in 64 KB Flash variant for cost-sensitive designs (vs EFM32WG295F64-BGA120)
- On-board upgrade path to 1 MB Flash / 128 KB RAM Giant Gecko (vs EFM32GG395F1024G-E-BGA120)
- Class-leading Stop-mode current of 0.65 uA (vs EFM32LG295F256G-E-BGA120)
Design Notes
Estimated: at 48 MHz active CPU running sensor code, current is approximately 10.1 mA (211 uA/MHz x 48 MHz). For coin-cell applications, enable the energy mode EM2 (deep sleep) wherever possible - Stop-mode current drops to 0.65 uA per the EFM32WG data sheet, allowing a CR2032 cell to power the MCU for years if the duty cycle is kept below 0.1%. Use the peripheral reflex system to wake on ADC, GPIO, or timer events autonomously without the CPU.
The 120-BGA (7x7 mm) package uses 0.5 mm ball pitch and requires NSMD (non-solder-mask-defined) pads with via-in-pad or tented-via escape for reliable reflow. Place four-layer PCB stack-up with continuous GND plane beneath the BGA to provide thermal spreading and reference for high-speed USB signals. Decouple each VDD/VDD_DCDC pair with 100 nF X7R plus 4.7 uF X5R ceramic within 2 mm of the balls per Silicon Labs reference design AN0009.
Route the differential USB DP/DM pair as 90 ohm impedance matched traces under 25 mm length with no splits in the GND reference plane. Isolate the 32 kHz crystal XTAL traces from any high-frequency switching signals, and guard the analog AVDD rail with ferrite beads plus pi-filter (10 uF / 100 nF / 10 uF) to keep ADC SNR above 70 dB. Use the Silicon Labs Simplicity Studio hardware config tool to generate a reference design layout for the BGA-120.
Do not program the 256 KB Flash with code targeting the 64 KB EFM32WG295F64-BGA120 variant - verify the linker script and linker symbol addresses match the target's Flash size. Do not enable the LCD controller when no segment LCD is connected - the segment pins remain configured as outputs and can source current. Do not skip the brown-out detector configuration; without it, an undervoltage event during Flash write can corrupt the program memory permanently.
When using the hardware AES-256 accelerator, ensure that DMA channels for AES I/O do not share priority with high-frequency ADC sampling - the AES accelerator can stall the AHB bus for 20-40 cycles per 16-byte block, which can cause ADC sample jitter. Use the peripheral reflex system to buffer crypto operations away from time-critical interrupts. The Wi-Fi LTE or BLE coexistence library from Simplicity Studio handles priority scheduling automatically.
Compliance Information
RoHS and REACH compliance per Silicon Labs product page. Not AEC-Q100 qualified - this part targets industrial and consumer markets, not automotive. Lead-free and halogen-free packaging confirmed via Silicon Labs material declaration.
