15801 Chemical L ane, Hun tington Be ach, CA 92649
Phone: (714) 898-0960
FAX: (714) 896-0971
Rhombus
Transformers & Magnetic Products
Industries Inc.
www.rhombus-ind.com
PARAMETER UNITS
Turns Ratio 1 : 1 +
1%
Line Impedance 135 Ω
Inductance (Line Side) 200 Min mH
Leakage Inductance 10 kHz - 1VRMS 60 Max. µ H
Primary DC Resistance 18.2 Max. Ω
Secondary DC Resistance 18.2 Max. Ω
Frequency Response 1.0 Typ. dB
100 Hz - 112 kHz
Insertion Loss @ 10kHz 1.25 Typ. dB
Isolation (HI-POT) 1875 V
RMS
Primary DC 0 mA
Return Loss @ 100 Hz - 100 kHz 15 Typ. d B
Longitudinal Balance 200 - 1000 Hz 40 Typ. d B
15 kHz 35 Typ. dB
Interwinding Capacitance 65 Max. pF
10 kHz - 1 VRMS
4/15/98
SCHEMATIC DIAGRAM:
T-997G
DDS Aplications
Pulse Transformers
Designed to meet the requirements
of Bellcore TR-NWT-000499,
Synchronous Digital Data
Interface-64 Kbps and Subrates
Recomended for use with level
one LXT400 & LXT456
Custom versions of this
transformer are available.
A Surface Mount version of this
transformer is available
Compatible with Level One
transceiver ICs
1
3
5
10
8
6
SecondaryPrimary
Physical Dimensions in inches (mm)
.522
(13.26)
MAX.
.100
(2.54)
.028
(0.70)
.532
(13.51)
MAX.
.516
(13.1)
.675 (17.15)
.663 (16.85)
.516
(13.1)
MAX.
.025
(0.64)
8
7
6
.100
(2.54)
TYP.
.715
(18.15)
.050
(1.27)
TYP.
.100
(2.54)
TYP.
Suggested
Pad Layout
1
2
3
4
5
9
10