2745G Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – HIGH FREQUENCY MAGNECTICS T1/E1 Through Hole Transformers

HIGH FREQUENCY MAGNECTICS
T1/E1 Through Hole Transformers
TM00117
• 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
• 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
ELECTRICAL SPECIFICATIONS AT 25° C
Part Number
Turns Ratio
± 2%
Inductance¹
mH min
DCR
Ω
max
(3-1) : (4-6)
(3-1)
2745G
1 : 1.14CT
1.75
2745G3
1 : 1.14CT
1.75
1. measured at 10 kHz, 0.1 V
2. measured at 100 kHz, with (4-6) shorted
(3-1)
0.95
0.95
(4-6)
1.1
1.1
Leakage
Inductance ²
µH max
Interwinding
Capacitance
pF typ
(3-1)
1.3
1.3
(3-1) and (4-6)
80
80
Minimum
Interwinding
Breakdown
Voltage
Vrms
(3-1) and (4-6)
1000
1000
Part Number
2745G
2745G3
Typical Frequency and Time Response
Terminating
Impedances
Bandwidth
(3 dB)
Risetime
10 Ω : 100 Ω
10 Ω : 100 Ω
1 kHz - 25 MHz
1 kHz - 25 MHz
14 ns
14 ns
Overshoot
Droop
(350 ns pulse)
0%
0.1%
0%
0.1%
SCHEMATIC
2745G
2745G3
3
4
5 CT
1
6
1 : 1.14 CT
©2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
T1-39