5Pcs STM32L151CBT6A MCU 32-bit ARM Cortex M3 RISC 128KB Flash LQFP-48Packing List 5 Pcs Core Size 32 Bit Single Core Speed 32MHz Connectivity I2C, IrDA, LINbus, SPI, UART USART, USB Peripherals Brown out Detect Reset, Cap Sense, DMA, I2S, POR, PWM, WDT Number of I O 37 Program Memory Size 128KB (128K x 8) Program Memory Type FLASH EEPROM Size 4K x 8 RAM Size 32K x 8 Voltage Supply (Vcc Vdd) 1. 8V ~ 3. 6V Data Converters A D 16x12b; D A 2x12b Oscillator Type Internal Operating Temperature 40C ~ 85C (TA) Mounting Type