The LL1521B is a high impedance line input transformer, very similar to the LL1540 but with a slight stepup. Turns ratio 1 + 1 : 2.28 Usage: In+ pin 1 (left row, bottom pin when viewed from component side) In- pin 3 connect pin 2 + pin 4 Out+ pin 5 (right row, bottom pin when viewed from component side) Out- pin 8 Shields pin 6
