All ON Semiconductor / Fairchild 16 OSRAM Opto Semiconductors 11 Optek / TT Electronics 9 Everlight 8 Kingbright 7 Vishay Semiconductors 7 Wurth Elektronik 6 Lite-On 4 Stanley Electric 4 Lumex 2 Sharp Microelectronics 2 ROHM Semiconductor 1 Parallax 1