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 135 w inductance (line side) 200 min mh leakage inductance 10 khz - 1vrms 60 max. m h primary dc resistance 18.2 typ. w secondary dc resistance 18.2 typ. w frequency response 1.0 typ. db 100 hz - 112 khz insertion loss @ 10khz 1.25 typ. db isolation (hi-pot) 1875 v rms primary dc 0 ma return loss @ 100 hz - 100 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 vrms 4/15/98 physical dimensions in inches (mm) schematic diagram: T-997 dds aplications pulse transformers designed to meet the requirements of bellcore tr-nwt-000499, synchronous digital data interface-64 kbps and subrates recomended for use with level one lxt400 & lxt456 custom versions of this transformer are available. a surface mount version of this transformer is available compatible with level one transceiver ics 1 3 5 10 8 6 secondary primary pin position grid 0.100 (2.54) holes for bobbin pins pin diameter is 0.025 ( 0.64 ) .100 (2.54) typ. .160 (4.06) typ. .545 (13.84) max. .625 (15.88) .118 (3.00) .048 (1.22) .625 (15.88) bottom view 1 5 6 10
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