HIGH FREQUENCY MAGNECTICS
T1/E1 Through Hole Transformers
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Operates as a line-interface pulse transformer in
DS1 and CEPT applications
Designed for automatic machine placement into
printed wiring boards
Only difference between the 2745G and 2745G3 is
the terminal length
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•
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Operating temperature range: -40° C to +85° C
Meets IEC 695, 2-2 flammability requirements
PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
Reliability testing: Shock, vibration, temperature cycling,
temperature - humidity - bias
TM00117
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ELECTRICAL SPECIFICATIONS AT 25° C
DCR
Leakage
Inductance
2
µH max
Interwinding
Capacitance
pF typ
Minimum
Interwinding
Breakdown
Voltage
Vrms
(3-1) and (4-6)
1000
1000
Turns Ratio
± 2%
Part Number
Inductance
1
mH min
Ω
max
(3-1) : (4-6)
2745G
2745G3
1 : 1.14CT
1 : 1.14CT
(3-1)
1.75
1.75
(3-1)
0.95
0.95
(4-6)
1.1
1.1
(3-1)
1.3
1.3
(3-1) and (4-6)
80
80
1. measured at 10 kHz, 0.1 V
2. measured at 100 kHz, with (4-6) shorted
Typical Frequency and Time Response
Part Number
Terminating
Impedances
2745G
2745G3
10
Ω
: 100
Ω
10
Ω
: 100
Ω
Bandwidth
(3 dB)
1 kHz - 25 MHz
1 kHz - 25 MHz
Risetime
Overshoot
Droop
(350 ns pulse)
0.1%
0.1%
14 ns
14 ns
0%
0%
SCHEMATIC
2745G
2745G3
3
4
5 CT
1
1 : 1.14 CT
©2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00
6
Bel Fuse Inc.
198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
T1-39