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Figures 1 - 6  |  Figures 7 - 11  |  Schematics 1 - 7  |  Schematics 8 - 14  
Telephone Coupling Transformers
Applications
Data/voice modem terminals to telephone lines
Designed to meet FCC Part 68
1500 Volt Dielectric Strength Units
Frequency 300 - 3500 Hz
Return loss: 20 db min
Electrical Specifications

Voice/Data Coupling
Part No. Impedance Madc Ins.
L. DB		 DCR Schematic Figure Notes
Pri Sec Pri Sec
TB191 600 600 0 1.0 36 50 1 1 1500V RMS hipot.  For international applications.
TB192 600 600 0 1.0 38 52 1 1
TD191 600 CT 600 CT 0 1.0 36 50 6 3 1500V RMS hipot.  For international applications.
TD192 600 CT 600 CT 0 1.0 38 52 6 3
TN191 600 CT 600 CT 0 1.5 44 56 14 10 1500V RMS hipot between windings, 1250V between windings and core.  For international applications.  Return loss 18 dB min.
TB193 600 900 0 1.0 36 77 1 1 Electrostatic shield.
TC191 900 900 0 1.0 55 78 7 2 For bridging applications.
TB194 4000 600 0 1.0 340 51 1 1 Level  - 15  to  +7 dBm.
TH351 900/600 600 Split 60/75 Pri. 1.2 62 36/36 2 6
TI411 600 600 Split 75 1.7 100 49/49 8 7 1500V RMS hipot.  For international applications.
TI412 600 600 Split 75 2.0 127 76/76 8 7
TJ411 600 600 Split 120 0.8 40 25/25 9 8
TI413 600 600 Split 120 1.0 74 23/23 8 7 1500V RMS hipot.  For international applications.  Longitudinal balance 40 dB min.  Return loss 14 dB min.
TF481 600 900/600 100/120 Sec. 0.5 25 126 5 5 Electrostatic shield.
Data Modem Coupling
Part No. Impedance Madc Ins.
L. DB		 DCR Schematic Figure Notes
Pri Sec Pri Sec
TO191 600 600 90 2.0 55 78 12 11 Low profile freq resp. +/- 1 dB 660 Hz - 3.5 kHz
@ 0 dBm 2kHz ref.
TO192 600 600 CT 90 2.0 71 117 13 11 Low profile freq resp. +/- 1 dB 660 Hz - 3.5 kHz
@ 0 dBm 2kHz ref.
TB195 600 600 90 2.0 71 117 12 1 Freq resp. +/- 1 dB 660 Hz - 3.5 kHz
@ 0 dBm 2kHz ref.
TD193 600 600 CT 90 2.1 71 117 12 3 Freq resp. +/- 1 dB 660 Hz - 3.5 kHz
@ 0 dBm 2kHz ref.
TM191 600 600 90 1.8 75 100 1 9 0.50" max. ht. Freq resp. +/- 1.3 dB 500Hz - 3.5 kHz. +/- 2.5 dB 300 Hz - 3.5 kHz @ 0 dBm.  Return loss 14 dB min.  1.8 kHz ref.
TN192 600 600 Split 90 1.8 75 100 8 10 0.50" max. ht. Freq resp. +/- 1.3 dB 500Hz - 3.5 kHz. +/- 2.5 dB 300 Hz - 3.5 kHz @ 0 dBm.  Return loss 14 dB min.  1.8 kHz ref.
TN193 600 600 Split 50 1.6 75 95 8 10 0.50" max. ht. Freq resp. +/- 0.7 dB 500Hz - 3.5 kHz. +/- 1.6 dB 300 Hz - 3.5 kHz @ 0 dBm.  Return loss 14 dB min.  1 kHz ref.
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ISL Products International Ltd.
   235-P Robbins Lane, Suite 270
   Syosset, NY 11791

Toll free - (888) 904-9054 | email: info@islproducts.com