ISDN U-Interface Transformers
Meets key parameters of ANSI T1.601-1992
For both 2B1Q & 4B3T ISDN U-Interface Applications
Isolation 2000VRMS Minimum
Excellent Longitudinal Balance
Higher Isolation Models Available
Designed for use with leading Transceiver Chips
Electrical Specifications at 25OC
Schematic
Turns
Ratio
( + 3 % )
OCL1+6% Line
1DCR
max.
( Ω )
2DCR
max.
( Ω )
DC
"A"
2
5
Part
Number
Pri
Side
Pins
Bias
Isolation Schem.
( mH )
(mA) Coding
(VRMS
)
Style
T-13200
T-13201
T-13202
T-13203
T-13204
T-13205
T-13216
T-13226
T-13227
T-13229
T-13230
T-13231
1:1
22
22
2-11
2-11
2-11
2-11
2-11
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
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
1
6
7
Line
Side
Chip
Side
12
1:1.5
1:1.8
1:2
22
11
2
8
22
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
Schematic
"B"
27.0
35.0
7.9
5.0
5.0
2.0
5-7
5
5-7
8
6
Chip
Side
Line
Side
14.5
14.5
14.5
27.0
5-7
2.0
3.0
2.0
3.0
5-7
5-7
11
7
5-7
1Line Side
Longitudinal Balance (2B1Q Coding)
2DeviceSide
281 Hz to 40 KHz
> 40 KHz
55 dB min.
-20 dB/ decade
Manufacturer
Name
I.C.
Part Number
Transformer
Part#
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."
AMD
AM 20902
AM2091(C)
T7262/ 63
MTC 2071
MT8910
T-13226
T-13229
T-13230
T-13226
T-13227
T-13231
T-13205
T-13226
T-13229
T-13205
T-13216
Longitudinal Balance (4B3T Coding)
AMD
5 KHz
20 KHz to 150 KHz
1 MHz
20 dB min.
40 dB min.
36 dB min.
AT&T
Mietec
Operating Temp. Range -400C to +850C
Mitel
Return Loss
10 and 25 KHz 20 dB min.
Motorola
National
Siemens
Siemens
SGS-Thomson
MC145472
TP 3410
Primary is Line Side
Secondary is Chip Side
PEB2090
ForCompleteDetailsincluding
PDF Catalogs&DataSheetsonthis
and otherproduct familiesvisit
Surge Voltage Capability:
PEB2091 (C1)
ST5410
µ
Metallic Voltage: 800 V peak, 10/ 700 S
SGS-Thomson STLC5411
µ
www.rhombus-ind.com
Longitudinal Voltage:2400 V peak, 10/ 560
S
Package Physical Dimensions
in inches (mm)
RM-8 Package
For other values & Custom Designs, contact factory.
ISDN-URM - 10/97
Specifications subject to change without notice.
15801ChemicalLane,Huntington Beach,CA 92649-1595
Rhombus
Industries Inc.
18
•
Tel: (714) 898-0960 Fax: (714) 896-0971