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 25
O
C
Part
Number
Turns
Ratio
(+3%)
OCL
1
+6%
Pri
( mH )
Line
Side
Pins
1
Meets key parameters of ANSI T1.601-1992
Isolation 2000V
RMS
Minimum
Higher Isolation Models Available
Schematic
"A"
Coding
Isolation
(V
RMS
)
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 -40
0
C to +85
0
C
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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