LL5008 is a low profile, low leakage inductance line output transformer. Connections are made through short flying leads and not through pins. This was a solution to save board height. I am afraid we have no data sheet for this type. For similar function, please study the LL1524 or LL7401. Pin configuration (transformer seen from side of flying leads) 1 5 2 6 3 7 4 8 LL5008 usage (1:1) in+ pin 2 in- pin 4 connect pins 1+3 out+ pin 6 out- pin 8 connect pins 5+7