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

HIGH FREQUECY MAGNETICS
T1/E1 Surface Mount Transformer
TM00136
• 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
• Can replace 2771C with no PWB changes
• Low-capacitance design for EMI suppression
• 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
Inductance²
mH min
(4-1)¹
2779B
1CT : 2 CT
3.0
1. connect 2 to 3 & 6 to 7
2. measured at 10 kHz, 0.1 Vac
3. measured at 100 kHz
DCR
Ω
max
(4-1)¹
(5-8)¹
1.6
3.1
Leakage
Inductance³
µH max
(4-1)¹
Interwinding
Capacitance¹
pF typ
Minimum
Interwinding
Breakdown
Voltage¹
Vrms
3.0
20
1500
SCHEMATIC
2779B
4
5
2
CT
3
7
CT
6
1
8
1 CT : 2 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
T1-81