15801 chemical lane, huntington beach, ca 92649 phone: (714) 898-0960 fax: (714) 896-0971 rhombus transformers & magnetic products industries inc. www.rhombus-ind.com parameter units turns ratio 1 : 1 + 1% line impedance 143 w inductance (line side) 40 min mh leakage inductance 10 khz - 0.5v rms 40 max. m h primary dc resistance 2.9 typ. w secondary dc resistance 5.9 typ. w frequency response 1.0 max. db 1 khz - 200 khz insertion loss @ 10khz 0.5 typ. db isolation (hi-pot) 1875 v rms primary dc 0 ma return loss @ 1 khz - 200 khz 15 typ. db longitudinal balance 200 - 1000 hz 40 typ. db 15 khz 35 typ. db interwinding capacitance 65 max. pf 10 khz - 1 v rms 4/15/98 physical dimensions in inches (mm) schematic diagram: T-998NC dds aplications pulse transformers 1 3 5 10 8 6 secondary primary pin diameter is 0.025 (0.64) .100 (2.54) typ. .210 (5.33) typ. .525 (13.34) max. .550 (13.97) max. .536 (13.61) max. .400 (10.16) typ. 1 2 3 4 5 10 9 8 76 bottom view pin position grid 0.100 (2.54) holes for bobbin pins designed to meet the requirements of bellcore tr-nwt-000499, synchronous digital data interface-64 kbps and subrates recomended for use with level one lxt441 custom versions of this transformer are available. a surface mount version of this transformer is available compatible with level one transceiver ics
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