LT4295 IEEE 802.3bt PD Interfaces Analog Devices Inc. LT4295 IEEE 802.3bt PD Interfaces feature a forward/flyback controller and is an IEEE 802.3af/at/bt(Draft 2.0)-compliant powered device (PD). The T2P output indicates the number of classification events received during IEEE 802.3bt-compliant mutual identification and negotiation of available power.