MicroSTC15L104W-35I-SOP8 is an 8-pin, Surface Mount Technology (SMT) integrated circuit (IC) that is designed and manufactured by STC Micro. This particular model is a One-Time Programmable (OTP) 8051-based microcontroller, with a 150 mil Reduced Outline Package (ROP) 8-pin Small Outline Integrated Circuit (SOIC) footprint. STC15L104W-35I-SOP8 is RoHS compliant, meaning it does not use lead-based solder in its manufacturing process, and it is designed to be used in a wide variety of electronic devices. The STC15L104W-35I-SOP8 features 4KB of flash memory, 128 bytes of internal RAM, six I/O ports, an 8-level deep hardware stack, 10 bit ADC, two output compare/capture channels, two Timer/counters, and an infrared serial data receiver.