Part Number XC-556-R3 having (CAGE Code 27014) and FSC 5980 Optoelectronic Devices and Associated Hardware in stock with ready to ship. Get an instant quote for XC-556-R3 Light Emitting Diode by National Semiconductor Corp. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.