2771H Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – HIGH FREQUENCY MAGNETICS T1/E1 Dual Ratio Surface Mount Transformer

HIGH FREQUENCY MAGNETICS
T1/E1 Dual Ratio Surface Mount Transformer
TM00135
• Operates at the T1 rate of 1.544 Mb/s and the E1 rate
of 2.048 Mb/s
• Provides two ratios to handle both 75Ω and 120Ω
lines
• Minimum Interwinding Breakdown Voltage of 1500
Vrms
• 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%
Inductance²
mH min
(4-1):(5-2) (4-1):(5-8)¹
(4-1)
DCR
Ω
max
(4-1) (5-2)
(5-8)¹
Interwinding
Capacitance
pF max
(4-1) : (4-1) :
(5-2) (5-8)¹
Leakage
Inductance³
µH max
(4-1)⁴ (4-1)⁵
Minimum
Interwinding
Breakdown
Voltage
Vrms
2771H
1 : 1.08
1 : 1.36
1.85
1. connect 2 to 3
2. measured at 10 kHz, 0.1 Vac
3. measured at 100 kHz, 0.1 Vac
4. with (5-8) shorted and 2 & 3 connected
5. with (5-2) shorted
0.74
3.2
4.0
15
23
1
1.3
1500
SCHEMATIC
2771H
4
5
2
3
1
8
1 : 1.08
1 : 1.36
©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
T1-79