FT61F131B-RB is a single chip micro-controller manufactured by Fremont Micro Devices. It is equipped with a 8-bit CMOS micro-controller core and designed for low voltage applications. This part operates from a 3.0V to 5.5V operating voltage range and is compatible with various types of serial communication protocols such as SPI, I2C and UART. The FT61F131B-RB supports 16 sources of interrupt requests, timers, 1-wire interface, WDT, RTC, PWM, Brown-out reset, 2-bit ADC, and various peripherals. It has a total of 8kb of Flash memory with 1kb SRAM and provides a maximum clock speed of 16MHz. The FT61F131B-RB is RoHS compliant and is available in a SOP-8 package.