The EFM32LG840F64-QFN64, manufactured by Silicon Labs, is an integrated circuit.

• Package: 64-WFQFN exposed pad
• Core Processor: ARM Cortex-M3
• Speed: 48MHz
• Connectivity: I2C, IrDA, SmartCard, SPI, UART/USART
• Peripherals: Brown-out detect/reset, DMA, LCD, POR, PWM, WDT
• Program Memory Size: 64KB
• Program Memory Type: FLASH
• A/D Converters: 8x12b
• D/A Converters: 2x12b
• Supply Voltage: 1.85V ~ 3.8V
• Manufacturer Pack Quantity: 1,000
• MSL Level: 3 (168 hours)
• Data Bus Width: 32-bit
• Number of I/O: 56
• Data RAM Size: 32K x 8

It is an obsolete product and comes in a 64-WFQFN exposed pad package. The supply and demand status for this product is limited.