The FT61F021A (specifically the FT61F021A-RB) is an 8-bit RISC architecture microcontroller manufactured by FMD (Fremont Micro Devices). It features 2KB of Flash program memory, an internal oscillator, and integrated Analog-to-Digital Converter (ADC) channels in a compact 8-pin package.Technical SpecsCore: 8-bit RISC MCUFlash Memory: 2 KBRAM (SRAM): 128 BytesPackage Type: 8-SSOP / SOP-8Operating Voltage/Speed: Up to 16 MHz internal oscillatorPeripherals: 10-bit ADC (7 channels), timers