2745AJ Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – HIGH FREQUENCY MAGNETICST1/E1 Through Hole Transformers

HIGH FREQUENCY MAGNETICS
T1/E1 Through Hole Transformers
TM00121
• Operates as a line-interface pulse transformer in DS1
and CEPT applications
• Desiged for automatic machine placement into
printed wiring boards
• Only difference between the 2745AJ and 2745AJ2 is
the terminal length
• Only difference between the 2745CA and 2745CA2
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%
Pri : Sec
Primary
Inductance*
mH min
Leakage
Inductance
µH max
DCR
Ω
max
Pri
Sec
Interwinding
Capacitance
pFmax
Interwinding
Breakdown
Voltage
Vrms min
Shielded
Version
2745AJ
1 : 1.07 CT
1.0
0.8
0.50
1.00
N/A
850
___
2745AJ2
1 : 1.07 CT
1.0
0.8
0.50
1.00
N/A
850
___
2745CA
1 : 1.36 CT
0.92
0.7
0.85
1.2
20
1000
2741H2
2745CA2
1 : 1.36 CT
0.92
0.7
0.85
1.2
20
1000
2741H2
* Measured at 10 kHz, 0.1 Vac
Lucent IC
Part Number
Application
T7288
T7289A
T7290A
CEPT 75 / CEPT 120
DS1
DS1
T1 / CEPT 75 / CEPT 120
Receive
Transmit
Bel Part Number
2745AF2
2745AF2
2745AF2
2745AF2
Bel Part Number
2745CA2
2745G3
2745AJ2
2745CA2
SCHEMATICS
2745AJ
2745AJ2
3
4
5
1
6
T7630
T7688
DS1
CEPT 75.1
CEPT 75.2 / CEPT 120
CEPT 75.1
CEPT 75.2 / CEPT 120
2745G3
2745AJ2
2745CA2
2745AJ2
2745CA2
2745G3
2745AJ2
2745CA2
2745AJ2
2745CA2
Primary
Secondary
2745CA
2745CA2
3
4
T7689
DS1
2745G3
2745G3
2
T7690
T7698
DS1
CEPT 75.1
CEPT 75.2 / CEPT 120
2745G3
2745AJ2
2745CA2
2745G3
2745AJ2
2745CA2
1
Primary
6
Secondary
©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
T1-47