LL4604 is a general purpose isolation transformer with a mu metal lamination core. Turns ratio 1+1 : 1ct. Usage: in+ pin 1 in- pin 2 in+ pin 4 in- pin 5 (Pins 1, 2, 4, 5 can be used in series or in parallel) out+ pin 7 out centertap pin 3 out- pin 9 Shields pins 6 and 10