KS8721BL/SL Micrel KS8721BL/SL 3.3V Single Power.
KSZ8721BL - 3.3V Single Power Supply 10/100 Base-TX/FX MII Physical Layer Transceiver
KSZ8721BL - 3.3V Single Power Supply 10/100Base-TX/FX MII Physical Layer Transceiver