HIGH FREQUENCY MAGNETICS
T1/E1Surface Mount Transformers
TM00137
•
•
•
Operate at the T1 rate of 1.544 Mbits/s and at the E1
rate of 2.048 Mbits/s
•
•
•
Operating temperature range: -40° C to +85° C
Meets IEC 695, 2-2 flammability requirements
Designed for transmit and receive line interface
applications
PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
1500 Volt isolation
•
Reliability testing: Shock, vibration, temperature cycling,
temperature - humidity - bias
ELECTRICAL SPECIFICATIONS AT 25° C
DCR
Nominal
Inductance2
Turns Ratio
mH min
Leakage
Inductance3
µH max
Interwinding
Capacitance4
pF
Minimum
Interwinding
Breakdown
Voltage
Ω
max
±2%
Part Number
(4-1):(5-8)1
(4-1)
(4-1)
(5-8)1
(4-1)1
(4-1) & (5-8)1
Vrms
2779C
2779J
1 : 1.36CT
1 : 1.07CT
1.0
1.3
0.85
0.60
1.30
1.10
0.70
0.80
25 max
20 typ
1500
1500
1. connect 6 to 7
2. measured at 10 kHz, 0.1 Vac
3. measured at 100 kHz, 0.1 Vac
4. measured at 1 kHz, 1 Vac
SCHEMATIC
2779C
2779J
4
5
6
7
8
1
1 : N
©2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
T1-83
