The SiM3C157-B-GQR from Silicon Labs is an embedded microcontroller IC that belongs to the SiM3C1xx series. It has an ARM Cortex-M3 core processor that operates @ a speed of 80 MHz.

• Core: 32-bit single-core device
• Oscillator: internal
• Standard Package: 250
• Mounting: surface-mount technology (SMT)
• I/O pins: 65
• Program memory size: 128 KB (128K x 8)
• Program memory type: FLASH type
• RAM Size: 32K x 8
• Data converters: A/D 32x12b; D/A 2x10b
• Connectivity: EBI/EMI, I2C, IrDA, SmartCard, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
• Package: 80-TQFP package
• Operating Temperature: -40°C to 85°C (TA)
• Supply Voltage: 1.8V to 3.6V
• Product Status: obsolete