2779G Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – HIGH FREQUECY MAGNETICS T1/E1 Surface Mount Transformers

HIGH FREQUECY MAGNETICS
T1/E1 Surface Mount Transformers
TM00138
• Operates at the T1 rate of 1.544 Mbits/s and at the
E1 rate of 2.048 Mbits/s
• Designed for transmit and receive line interface
applications
• Low capacitance design with specific interwinding
insulation (2779L)
• 1500 Volt isolation
• 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
Nominal
Turns Ratio
±2%
(4-1):(5-8)¹
2779G
1 : 1.14 CT
2779L
1 : 1.14 CT
1. connect 6 to 7
2. measured at 10 kHz, 0.1 Vac
3. measured at 100 kHz
Inductance²
mH min
(4-1)
1.80
1.25
DCR
Ω
max
(4-1)
(5-8)¹
1.2
1.4
0.9
0.5
Leakage
Inductance³
µH max
(4-1)¹
Interwinding
Capacitance¹
pF
(4-1) & (5-8)¹
Minimum
Interwinding
Breakdown
Voltage
Vrms
1.3
20 typ
1500
1.8
10 max
1500
SCHEMATIC
2779G
2779L
4
5
7
CT
6
1
8
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 [phone] • Fax [phone] • www.belfuse.com
T1-85