15801 Chemical Lane, Huntington Beach, 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 143 Ω
Inductance (Line Side) 40 Min mH
Leakage Inductance 10 kHz - 0.5V
RMS
40 Max. µH
Primary DC Resistance 2.9 Typ. Ω
Secondary DC Resistance 5.9 Typ. Ω
Frequency Response 1.0 Max. dB
1 kHz - 200 kHz
Insertion Loss @ 10kHz 0.5 Typ. dB
Isolation (HI-POT) 1875 V
RMS
Primary DC 0 mA
Return Loss @ 1 kHz - 200 kHz 15 Typ. dB
Longitudinal Balance 200 - 1000 Hz 40 Typ. dB
15 kHz 35 Typ. dB
Interwinding Capacitance 65 Max. pF
10 kHz - 1 V
RMS
4/15/98
Physical Dimensions in inches (mm)
SCHEMATIC DIAGRAM:
T-998NC
DDS Aplications
Pulse Transformers
1
3
5
10
8
6
SecondaryPrimary
Pin Diameter is 0.025 (0.64)
.100
(2.54)
TYP.
.210
(5.33)
TYP.
.525
(13.34)
MAX.
.550
(13.97)
MAX.
.536
(13.61)
MAX.
.400
(10.16)
TYP.
1
2
3
4
5
10 9 8
76
Bottom
View
PIN POSITION GRID 0.100 (2.54)
HOLES FOR BOBBIN PINS
Designed to meet the requirements
of Bellcore TR-NWT-000499,
Synchronous Digital Data
Interface-64 Kbps and Subrates
Recomended for use with level
one LXT441
Custom versions of this
transformer are available.
A Surface Mount version of this
transformer is available
Compatible with Level One
transceiver ICs