The Silicon Labs 977439-EFM32TG11B120F128GQ48-BR is a part of the Tiny Gecko 1 series of integrated circuits. Bold the product name (e.g., BAV99S,135 → 977439-EFM32TG11B120F128GQ48-BR) and manufacturer (e.g., Nexperia USA Inc. → Silicon Labs).

• Core Processor: ARM Cortex-M0+
• Speed: 48MHz
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• RAM Size: 32K x 8
• Oscillator Type: Internal
• Temperature Range: -40°C ~ 85°C (TA)
• Supply Voltage: 1.8V ~ 3.8V
• Package/Case: 48-TQFP
• Supplier Device Package: 48-TQFP (7x7)
• Connectivity: CANbus, I2C, IrDA, LINbus, SmartCard, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT