T-1269 Datasheet, PDF (1/1 Pages) Rhombus Industries Inc. – ISDN U-Interface Transformer

ISDN U-Interface Transformer P/N T-1269
Turns Ratio (PRI : SEC)
(1-2 : 3-4)
(5-6 : 7-8)
1:1.5 : + 1%
1.58 : 1
1:1
Parameter
Inductance 5-8 (6-7, shorted)
Return Loss At 40 kHz
Total Harmonic Distortion ¹
DC Resistance 1 - 2
DC Resistance 3 - 4
DC Resistance 5 - 6
DC Resistance 7 - 8
Hi-Pot
Primary to Secondary
Min. Typ.
21.6
27
28
1.80
1.45
4.00
4.00
500
Max.
32.4
70
2.20
1.80
5.00
5.00
Units
mH
dB
dB
Ω
Ω
Ω
Ω
V_RMS
1. With 90 mADC through SEC and 40 kHz sine wave injected into
the PRI at a level which generates 5V p-p into 135 ohms at the SEC.
Schematic Diagram
1
2
30Ω PRI
3
4
5
24Ω
6
SEC
7
24Ω
8
Designed to meet the requirements
for national ISDN U-INTERFACE
chip TP3410
.840
(21.34)
.800
(20.32)
.640
(16.26)
.197
(5.00)
NOM.
Pin Diameter is 0.026 (0.66)
8
7
6
5
Bottom
View
1
2
3
4
.039
(0.99)
TYP.
Physical
Dimensions
inches (mm)
Pin Position Grid 0.100 (2.54)
Holes For Bobbin Pins
Holes For Clip Pins
Rhombus
Industries Inc.
Transformers & Magnetic Products
9/8/99
15801 Chemical Lane, Huntington Beach, CA 92649
Phone: [phone]
www.rhombus-ind.com
FAX: [phone]