prepared : qingli wu approved: xu wenbing date : 2001/01/11 drawing no.: isdn transformer rev.: a0 page : 1/1 t1/e1/cept/isdn-pri transformer p/n: S5820 data sheet a . electrical specifications@25 : 1. turns ratio: (16-14):(3-4):(2-4):(1-4)=1:1:1.15:1.26 ( 3%) & (6-8): (11-10-9)=1:2ct( 5%) 2. inductance (16-14)=(6-8): 1.5mh min. @10khz/0.1v 3. leakage inductance: 0.5uh max. pin16-14 with (1,2,3,4 short) @775khz 4. leakage inductance: 0.5uh max. pin6-8 with (9, 10, 11 short) @775khz 5. interwinding capacitance: 29pf max. pin (16-14) to (1,2,3,4) @ 775khz 6. interwinding capacitance: 35pf max. pin (6-8) to (9,10,11) @ 775khz 7. dc resistance (16-14=6-8=3-4): 0.7 ? max. 8. dc resistance (11-9): 1.4 ? max. 9. dc resistance (1-4): 1.0 ? max. 10. dielectric withstand voltage: pin (16-14 ) to (1,2,34) &(6-8) to (9,10,11) : 1500vrms. 11. phasing: 1, 16 and 6, 11 in phase b. schematic & mechanical:
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