ISDN U-Interface Transformers
For both 2B1Q & 4B3T ISDN U-Interface Applications Excellent Longitudinal Balance Designed for use with leading Transceiver Chips
Electrical Specifications at 25OC Part Number Turns Ratio (+3%) OCL1 +6% Pri ( mH ) Line Side Pins
1
Meets key parameters of ANSI T1.601-1992 Isolation 2000VRMS Minimum Higher Isolation Models Available
Schematic "A"
Coding Isolation (VRMS) Schem. Style
2 5 6 7 8
DCR max. (Ω)
2
DCR max. (Ω)
DC Bias (mA)
T-13200 T-13201 T-13202 T-13203 T-13204 T-13205 T-13216 T-13226 T-13227 T-13229 T-13230 T-13231
1 2
1:1 1:1.5 1:1.8 1:2 1:2.5 1.50:1 1.50:1 1.32:1 1.65:1 1.60:1 1.50:1 2.0:1
22 22 22 22 22 27.0 35.0 7.9 14.5 14.5 14.5 27.0
2-11 2-11 2-11 2-11 2-11 5-7 5-7 5-7 5-7 5-7 5-7 5-7
6.0 6.0 6.0 6.0 6.0 10.0 10.0 2.5 3.0 3.5 3.0 7.0
7.0 11.5 13.5 18.5 28 5.0 5.0 2.0 2.0 3.0 2.0 3.0
60 60 60 60 60 60 60 60 80 60 60 80
2B1Q 2B1Q 2B1Q 2B1Q 2B1Q 2B1Q 2B1Q 4B3T 2B1Q 2B1Q 2B1Q 2B1Q
2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000
A A A A A B B B B B B B
Line Side
1 12 11
Chip Side
Schematic "B"
2 5 8 6 11 7
Chip Side
Line Side
Line Side Device Side
NOTE: (For All Parts) OCL Tested @10 kHz / 700 mV, on Line Side pins 1&12 shorted for Schem. "A"; pins 8&6 for Schem. "B." Operating Temp. Range -400C to +850C Primary is Line Side Secondary is Chip Side Surge Voltage Capability: Metallic Voltage: 800 V peak, 10/700 µS Longitudinal Voltage: 2400 V peak, 10/560 µS
Longitudinal Balance (2B1Q Coding) 281 Hz to 40 KHz 55 dB min. > 40 KHz -20 dB/decade Longitudinal Balance (4B3T Coding) 5 KHz 20 dB min. 20 KHz to 150 KHz 40 dB min. 1 MHz 36 dB min. Return Loss 10 and 25 KHz 20 dB min.
Manufacturer I.C. Name Part Number AMD AM 20902 AMD AT&T Mietec Mitel Motorola National Siemens Siemens SGS-Thomson SGS-Thomson AM2091 (C) T7262/63 MTC 2071 MT 8910 MC145472 TP 3410 PEB 2090 PEB 2091 (C1) ST5410 STLC5411
Transformer Part # T-13226 T-13229 T-13230 T-13226 T-13227 T-13231 T-13205 T-13226 T-13229 T-13205 T-13216
For Complete Details including PDF Catalogs & Data Sheets on this and other product families visit
www.rhombus-ind.com
Package Physical Dimensions in inches (mm)
RM-8 Package
Specifications subject to change without notice.
For other values & Custom Designs, contact factory.
ISDN-URM - 10/97
Rhombus Industries Inc.
18
15801 Chemical Lane, Huntington Beach, CA 92649-1595 Tel: (714) 898-0960 • Fax: (714) 896-0971
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