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Silicon Labs EFM32LG330F256-QFN64
- Part No.:
- EFM32LG330F256-QFN64
- Manufacturer:
- Silicon Labs
- Category:
- Microcontrollers
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
EFM32LG330F256-QFN64.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,364
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Product details
Overview
EFM32LG330F256-QFN64 from Silicon Labs is a 32-bit ARM Cortex-M3 microcontroller operating at up to 48 MHz, featuring 256 kB flash, 32 kB RAM, and ultra-low power consumption - 0.65 μA in Stop mode (EM3) with RAM retention and brown-out detection. It integrates hardware AES encryption, 12-bit ADC (1 Msps), dual DAC, LCD controller, USB 2.0, and autonomous peripherals for battery-powered smart metering and industrial sensing.
For engineers reviewing the EFM32LG330F256-QFN64 datasheet, EFM32LG330F256-QFN64 pinout, EFM32LG330F256-QFN64 application, or EFM32LG330F256-QFN64 equivalent, this page delivers verified electrical specs, QFN64 package mapping, energy mode behavior, peripheral reflex system (PRS) autonomy, and direct alternative part comparisons for low-energy embedded design validation.
Technical Context
The EFM32LG330F256-QFN64 implements a flexible energy management architecture with five defined energy modes (EM0–EM4), where EM2 (Deep Sleep) enables peripheral operation including RTC and LESENSE while drawing just 0.95 μA. Its Peripheral Reflex System (PRS) allows autonomous inter-peripheral signaling without CPU intervention - critical for wake-up-triggered sensor data acquisition.
Core clocking supports multiple oscillators: HFXO (up to 48 MHz), LFXO (32.768 kHz), HFRCO/LFRCO/ULFRCO, and AUXHFRCO - enabling precise timing control across active and low-energy states. The integrated USB 2.0 controller includes on-chip PHY and 5 V-to-3.3 V regulator, supporting host and OTG functionality without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 @ 48 MHz - delivers deterministic real-time performance with Thumb-2 instruction set and 3-stage pipeline. |
| Memory | 256 kB flash / 32 kB RAM - sufficient for complex firmware with secure bootloader, sensor fusion, and USB stack. |
| Power Consumption | 0.65 μA in EM3 Stop mode - enables multi-year battery life in maintenance-free IoT endpoints with retained RAM and BOD. |
| Analog Peripherals | 12-bit 1 Msps ADC (8 SE/4 diff), 12-bit 500 ksps DAC (2 SE/1 diff), 2 ACMP, 3 OPAMP - supports precision analog front-end for metering and condition monitoring. |
| Connectivity | USB 2.0 (Host/OTG), 3× USART (SPI/I²C/UART/IrDA), 2× I²C, 2× LEUART - enables wired and low-energy wireless gateway interfaces. |
| Security | Hardware AES-128/256 accelerator (54/75 cycles) - offloads encryption for secure firmware updates and data transmission. |
| Package | QFN64 (9 × 9 mm, 0.5 mm pitch) - surface-mount compatible with standard reflow profiles and compact PCB layouts. |
Pinout & Package
EFM32LG330F256-QFN64 uses a 64-pin QFN package (9 × 9 mm body, 0.5 mm pitch, exposed thermal pad). Pin functions are configurable via alternate function registers and GPIO matrix routing, supporting flexible board layout and signal assignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core Power Supply | 1.98–3.8 V main supply; powers CPU, memory, and digital peripherals; requires local 100 nF decoupling. |
| VSS | Digital Ground | Reference return path for digital logic; must be connected to low-impedance ground plane. |
| PA0–PA7, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7 | General Purpose I/O | Up to 93 GPIOs with programmable drive strength, pull-up/down, filter, and PRS output capability. |
| USB_DP / USB_DM | USB Differential Pair | Full-speed USB 2.0 interface; integrated PHY eliminates need for external transceiver. |
| ADC0_CH0–CH7 | Analog Input Channels | Single-ended or differential inputs to 12-bit SAR ADC; supports internal temperature sensor and VDD monitoring. |
| LESENSE_IN0–IN15 | Capacitive/Sensor Input | Direct connection to Low Energy Sensor Interface for autonomous capacitive button or LC sensor monitoring in EM2. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous Peripheral Reflex System (PRS) | 12-channel event routing between peripherals (e.g., ADC completion → DMA trigger → TIMER start) without CPU wake-up. |
| Multi-Energy Mode Operation | EM0–EM4 modes with sub-μA deep sleep (EM4: 20 nA), enabling duty-cycled sensing with <2 µs wake-up latency. |
| Integrated LCD Controller | Drives up to 8×36 segments with voltage boost and autonomous animation - reduces MCU load in display-equipped meters. |
| Backup Power Domain | RTC and retention registers remain active during main power loss using VBAT, preserving timekeeping and state. |
| Pre-programmed Bootloader | Factory-installed USB/UART bootloader enables field firmware updates without JTAG debugger. |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
Use Scenario: Gas/water/electricity meter with tamper detection, pulse counting, and hourly data logging. IC Role / Device Role / Timing Role: Primary system controller managing metrology ADC, pulse counter, RTC timestamping, and secure LoRaWAN/Cellular modem interface. Use Value: 0.65 μA EM3 retention enables >10-year battery life; hardware AES secures firmware and usage data against replay attacks. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ in HVAC ducts. IC Role / Device Role / Timing Role: Low-power sensor hub aggregating data from I²C sensors, performing local calibration, and transmitting via LEUART to gateway. Use Value: LESENSE autonomously scans capacitive/humidity sensors in EM2 (0.95 μA), minimizing active CPU time and extending battery life to 5+ years. |
| Industrial Control Panel | Medical Wearable |
Use Scenario: Touch-enabled HMI for PLC-based machinery with real-time status display and alarm logging. IC Role / Device Role / Timing Role: Display controller (LCD driver + touch interface) and communication bridge (USB/USART) to PLC backplane. Use Value: Integrated LCD controller drives 8×36 segments with contrast control and animation engine - eliminates external display driver IC and reduces BOM cost. | Use Scenario: ECG/PPG patch collecting biometric signals and streaming encrypted data to smartphone via BLE (using external transceiver). IC Role / Device Role / Timing Role: Signal conditioning MCU processing analog front-end (OPAMP + ADC), managing power sequencing, and hosting BLE protocol stack. Use Value: 3× rail-to-rail OPAMPs with programmable gain enable high-SNR analog signal chain; 211 μA/MHz Run mode ensures efficient real-time filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-energy microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFM32PG12B500F512IM48 | ARM Cortex-M4F core, 40 MHz, 512 kB flash, 64 kB RAM, no USB, added FPU and crypto acceleration (ECC/SHA). | Better suited for floating-point sensor fusion or TLS stack execution; lacks USB but adds TrustZone support. | Select when advanced math or secure boot requirements outweigh USB connectivity needs. |
| STM32L476RG | ARM Cortex-M4, 80 MHz, 1 MB flash, 128 kB RAM, USB FS, 12-bit ADC (2.4 Msps), no PRS or LESENSE. | Higher performance and memory, but higher active current (82 μA/MHz); no autonomous low-energy peripheral triggering. | Choose for compute-intensive applications where energy autonomy is secondary to throughput. |
Compared with EFM32LG330F256-QFN64, the EFM32PG12B500F512IM48 offers enhanced security and DSP capability at the cost of USB and higher pin count, while STM32L476RG provides greater raw performance and memory but lacks the Leopard Gecko's sub-μA autonomous peripheral architecture essential for ultra-long-life battery designs.
Availability
EFM32LG330F256-QFN64 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, medical wearables, and HMI control panels requiring stable component supply and long-term production continuity.
Supply support for EFM32LG330F256-QFN64 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Silicon Labs is a fabless semiconductor company specializing in secure, intelligent wireless and wired connectivity solutions for IoT, industrial, and consumer markets.
The EFM32 Leopard Gecko family was designed specifically for ultra-low-energy embedded applications - prioritizing sub-μA sleep modes, autonomous peripheral operation, and integrated analog front-ends to minimize external components in battery-constrained systems.
FAQ
What is the maximum operating frequency of the EFM32LG330F256-QFN64?
The EFM32LG330F256-QFN64 operates at a maximum CPU frequency of 48 MHz using its high-frequency crystal oscillator (HFXO) or high-frequency RC oscillator (HFRCO). This speed is fully supported across all voltage ranges (1.98–3.8 V) and temperature grades (–40 °C to +85 °C), and is validated in both Run (EM0) and Sleep (EM1) energy modes. The EFM32LG330F256-QFN64 maintains timing compliance per Silicon Labs' datasheet Rev. 2.44 Section 4.10.4.
Does the EFM32LG330F256-QFN64 support USB device functionality without external components?
Yes, the EFM32LG330F256-QFN64 integrates a full-speed USB 2.0 controller with an on-chip PHY and embedded 5 V-to-3.3 V regulator, enabling USB device, host, and OTG operation without external transceivers or level shifters. USB_DP and USB_DM pins connect directly to the USB connector, and the internal regulator accepts 5 V VBUS input. This capability is confirmed in Section 3.1.12 and Table 4.17 of the EFM32LG Data Sheet Rev. 2.44.
How many energy modes does the EFM32LG330F256-QFN64 support, and what is the lowest current draw?
The EFM32LG330F256-QFN64 supports five energy modes: EM0 (Active), EM1 (Sleep), EM2 (Deep Sleep), EM3 (Stop), and EM4 (Shutoff). Its lowest operational current is 0.65 μA in EM3 Stop mode with brown-out detection and RAM retention at 3 V, and 20 nA in EM4 Shutoff mode (no RAM retention). These values are specified in Section 1 Feature List and Table 4.5.4 of the official datasheet Rev. 2.44.
Can the EFM32LG330F256-QFN64 perform analog measurements autonomously while the CPU remains asleep?
Yes, the EFM32LG330F256-QFN64 supports fully autonomous analog measurement via its Low Energy Sensor Interface (LESENSE) and Peripheral Reflex System (PRS). LESENSE can scan up to 16 capacitive or resistive sensors in EM2 Deep Sleep mode (0.95 μA), triggering ADC conversions and storing results in RAM without CPU involvement. PRS then routes events (e.g., ADC completion) to TIMER or DMA - all confirmed in Sections 3.1.28 and 3.1.9 of the EFM32LG Data Sheet Rev. 2.44.
What debug interface does the EFM32LG330F256-QFN64 use, and is SWD supported?
The EFM32LG330F256-QFN64 uses a 2-pin Serial Wire Debug (SWD) interface compliant with ARM CoreSight standards, supporting full JTAG-equivalent debugging, flash programming, and real-time tracing via the Embedded Trace Module (ETM). SWD is implemented on dedicated pins (SWCLK and SWDIO), and is documented in Section 3.1.2 and Table 4.20 of the EFM32LG Data Sheet Rev. 2.44. The EFM32LG330F256-QFN64 also includes a 1-pin Serial Wire Viewer (SWV) for printf-style debug output.
EFM32LG330F256-QFN64 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 64-WFQFN Exposed Pad
- Series:
- Leopard Gecko
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- I2C, IrDA, SmartCard, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 53
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.98V ~ 3.8V
- Data Converters:
- A/D 8x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
EFM32LG330F256-QFN64 FAQ
1.How can I place an order for EFM32LG330F256-QFN64 through Aetrix?
Please submit a Request for Quotation (RFQ) for EFM32LG330F256-QFN64 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for EFM32LG330F256-QFN64 reliable?
The price and inventory of EFM32LG330F256-QFN64 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EFM32LG330F256-QFN64 is usually 5 days.
3.What payment methods are accepted for EFM32LG330F256-QFN64?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EFM32LG330F256-QFN64 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EFM32LG330F256-QFN64?
EFM32LG330F256-QFN64 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EFM32LG330F256-QFN64 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for EFM32LG330F256-QFN64?
For technical support, including EFM32LG330F256-QFN64 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EFM32LG330F256-QFN64 requirements.
6.How does Aetrix verify that EFM32LG330F256-QFN64 is sourced from the original manufacturer or authorized distributors?
All EFM32LG330F256-QFN64 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that EFM32LG330F256-QFN64 meets industry standards.
7.What is the process for return or replacement of EFM32LG330F256-QFN64?
All EFM32LG330F256-QFN64 units undergo pre-shipment inspection (PSI). If there is an issue with EFM32LG330F256-QFN64, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The EFM32LG330F256-QFN64 part is unused and in its original packaging.
Return procedure for EFM32LG330F256-QFN64:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
EFM32LG330F256-QFN64 Tags
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