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

HIGH FREQUECY MAGNETICS
T1/E1 Surface Mount Transformer
TM00139
• 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 for EMI suppression
• Dual ratio for both 75Ω and 120Ω operation
• 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):(5-2) (4-1):(5-8)
Inductance¹
mH min
(4-1)
DCR
Ω
max
(4-1) (5-2) (3-8)
2779H
1 : 1.07
1 : 1.37
1.65
1.1 1.1 0.4
1. measured at 10 kHz, 0.1 Vac
2. measured at 100 kHz, 0.10 Vac
3. measured at 1 kHz, 1 Vac
Leakage
Inductance ²
µH max & min
(4-1)
0.70
Interwinding
Capacitance³
pF max
(4-1) & (4-1) &
(5-2)
(3-8)
Minimum
Interwinding
Breakdown
Voltage
Vrms
26
28
1500
SCHEMATICS
2779H
4
5
2
3
1
8
1 : 1.07
1 : 1.37
©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
T1-87