Transformers for T1 / CEPT / PCM Applications Available in both Thru-hole & SMD EP7 Packages Schematic "A" PRI. Schematic "B" Schematic "C" PRI. SEC. SEC. 1 6 2 5 3 4 6 2 5 3 4 1 1 2 1 Schematic "D" PRI. SEC. 6 75 Ω 5 2 100 Ω 6 3 3 120 Ω 4 4 Electrical Specifications at 25OC Part Impedance Number (Ω) (Hi-Pot) T-13800 Insertion Loss max. @ 772 kHz ( dB ) Frequency Response ( dB ) Return Loss min. ( dB ) 0.2 + 0.10 100 kHz to 1.544 MHz 25 * + 0.25 100 kHz to 1.544 ** MHz 15 ** + 0.15 100 kHz to 1.544 MHz 20 *** 100 / 100 ( 1200 VRMS ) T-13801 @ 772 kHz 100 / 100 / 100 ( 1500 VDC) T-13802 0.075 @ 772 kHz 75-100-120 / 75 (1650 VDC) 0.25 @ 772 kHz 100 kHz to 1.544 MHz 100 Ω 100 kHz to 4.0 MHz 100 Ω 50 kHz to 3.0 MHz 75 Ω Secondary 75 Ω, 100 Ω or 120 Ω Primary * ** *** Electrical Specifications 1,2,3 at 25OC Turns Part Ratio Number (+5%) Longitudinal Balance min. ( dB ) 35 Primary Secondary DCR max. DCR max. (Ω) (Ω) Style & Schem. 1.0 1.0 EP7 - A 0.6 0.6 EP7 - B 1.55 1.15 EP7 - C @ 1.544 MHz 35 @ 1.544 MHz 40 @ 1.0 MHz Surface Mount Versions of all Parts listed are available. Add suffix "G" to specify surface mount package style. PRI-SEC CW/W max. ( pF ) OCL min. ( mH ) Leakage Ind. max. ( µH ) Primary DCR max. (Ω) Secondary DCR max. (Ω) Style & Schem. Primary Pins T-13803 1CT : 1 1.2 35 1.0 0.9 0.9 EP7 - D 1-3 T-13804 1CT : 0.86 1.5 35 1.0 0.65 1.4 EP7 - D 1-3 T-13805 2CT : 1 1.2 50 1.0 1.1 0.7 EP7 - D 1-3 1. 1000 VRMS minimum Isolation. 2. ET-Product of 10 V-msec min. 3. OCL Measured at Primary @100KHz & 20mV .370 (9.40) MAX. .375 (9.53) MAX. .465 (11.81) MAX. "G" SMD Package .394 (10.00) MAX. .375 (9.53) MAX. .375 (9.53) MAX. .025 (0.64) .340 (8.64) .505 (12.83) .490 (12.45) .098 .028 (2.50) (0.70) .525 (13.34) .098 .024 (2.49) (0.61) 1 2 .110 (2.79) MIN. .080 (2.03) .039 (0.99) 3 Part Number Examples: T-13800 T-13800G T-13803 T-13803G (EP7 (EP7 (EP7 (EP7 Thru-hole) SMD) Thru-hole) SMD) 2 3 .100 (2.54) TYP. 6 1 Suggested Pad Layout 5 .050 (1.27) TYP. 4 Bottom View 6 5 .075 (1.905) TYP. 4 Specifications subject to change without notice. Rhombus Industries Inc. For other values & Custom Designs, contact factory. 10 T1-BOBIN - 4/99 15801 Chemical Lane, Huntington Beach, CA 92649-1595 Tel: (714) 898-0960 • Fax: (714) 896-0971