Manufacturer Name Brooktree Brooktree Brooktree Brooktree Brooktree Brooktree Brooktree HDSL Line Interface Transformers Thru-hole & Surface Mount Versions Electrical Specifications at 25OC P/N T-911 T-940 T-976 T-982 T-983 T-984 Turns Ratio 1:1 2:1 2:1 2:1 2:1 2:1 Inductance 3 5 2 3 3.5 8 mH DC Resistance Pri 3.8 3.5 2.5 2.5 2.5 4.0 Ω DC Resistance Sec 3.8 2.2 1.0 1.0 1.0 2.3 Ω Frequency Response 0.1 0.07 0.1 0.7 0.1 0.1 dB Insertion Loss 0.5 0.43 0.5 0.4 0.5 0.5 dB D.C. Current 100 100 160 160 60 60 mA Longitudinal Balance 50 53 50 53 53 53 dB Return Loss 17 17 16.5 20 17 16 dB Harmonic Distortion -70 -70 -70 -70 -70 -70 dB Isolation 1000 1500 1500 1500 1500 1500 VRMS B A A A A A I.C. Part # BT8921 BT8921 BT8960 BT8960 BT8960 BT8970 BT8970 Bit Rate 784 1168 160 288 416 784 1168 Units Transformer Part # T-982 T-976 T-984 T-940 T-983 T-982 T-976 Schematic "A" 1 PRI 9 4 SEC 2 7 5 Schematic "B" Schematic Style 1 PRI 4 10 7 2 5 9 6 SEC Request Individual Data Sheets for test conditions & additional information Standard Thru-hole EP-13 Package .550 (13.97) MAX. Surface Mount Versions of all Parts listed are available. Add suffix "G" to specify surface mount package style. .536 (13.61) MAX. .522 (13.26) MAX. .525 (13.34) MAX. .532 (13.51) MAX. Example: T-976G .516 (13.1) MAX. .210 (5.33) TYP. .100 (2.54) TYP. 10 9 8 7 .400 (10.16) TYP. 2 3 .100 .028 (2.54) (0.70) Pin Diameter is 0.025 (0.64) .516 (13.1) .675 (17.15) .663 (16.85) 6 Physical Dimensions inches (mm) Bottom View 1 .025 (0.64) 4 5 For Complete Details including PDF Catalogs & Data Sheets on this and other product families visit www.rhombus-ind.com Specifications subject to change without notice. Rhombus Industries Inc. For other values & Custom Designs, contact factory. 21 HDSL-EP - 5/99 15801 Chemical Lane, Huntington Beach, CA 92649-1595 Tel: (714) 898-0960 • Fax: (714) 896-0971