The SM5021A/B is a high performanceinfrared remote control encoder utilizing CMOS technology. Mode A is a signal-key control and mode B is a multi-key control during data transmission, supports eight data key inputs and a LED output to indicate the status during transmission. Auto power off function when key is not pressed to save power, custom codes to distinguish different products. SM5021 encoder is paired with SM5032 decoder for more data control applications.APPLICATIONS* SM3015 Fan Remote Control* Audio Remote Control* Toy Remote Control* Consumer Products Remote Control