The 1263563-SIM3U146-B-GMR is an integrated circuit with an ARM Cortex-M3 core processor that has a speed of 80MHz from Silicon Labs.

• Packaging: Tape and reel
• Standard Package: 2,500
• Mounting: SMD (SMT)
• Core Size: 32-bit single-core
• Connectivity: EBI/EMI, I2C, IrDA, SmartCard, SPI, UART/USART, and USB
• Peripherals: brown-out detect/reset, DMA, I2S, POR, PWM, and WDT
• I/O: 50
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• EEPROM Size: not specified
• RAM Size: 16K x 8
• Data Converters: A/D 28x12b and D/A 2x10b
• Oscillator Type: Internal
• Package/Case: 64-VFQFN exposed pad
• Supplier Device Package: 64-QFN (9x9)
• Temperature Range (TA): -40°C to 85°C
• Supply Voltage - Operating: 1.8V to 3.6V
• ECCN: 5A992C
• HTSUS: 8542.31.0001
• Base Product Number: SIM3U146
• Product Status: not for new designs