First line: 4258p po473 LTC4258 Quad IEEE 802.3af Power over Ethernet Controller with Integrated DetectionAbstract: .. Detect, AC Blocking and Transient Supressor Diodes. During detection and classification, the LTC4258 senses the port voltage through the detect diodes D DET. Excessive voltage drop across .. Tags: po4734258psupressor 20VREG IC 48V IN 12V 10A OUTcmpz4702bLTC4258