2795M Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – HIGH FREQUENCY MAGNETICS DS3/E3/STS-1 Dual-ratio Surface Mount Transformer

HIGH FREQUENCY MAGNETICS
DS3/E3/STS-1 Dual-ratio Surface Mount Transformer
TM00149
• Miniature transformer supports E3, DS3, SONET STS-1 • Operating temperature range: -40° C to +85° C
rates (34.368, 44.736, 51.84 Mb/s)
• Meets IEC 695, 2-2 flammability requirements
• Dual ratios for multiple applications:
Turns ratios: 1:1 and 1:2CT
• PWB Process Capability: standard printed wiring board
Impedance ratios: 1:1 and 1:4
assembly techniques, total-immersion cleaning
• Superior temperature linearity
• External shield for EMI suppression
• Can handle 15 mA DC Bias
ELECTRICAL SPECIFICATIONS at 25° C
• Reliability testing: shock, vibration, temperature cycling,
temperature - humidity - bias
• Precision machine winding: 1% tolerance
• Minimum interwinding breakdown voltage of 1500 Vrms
Part
Number
Turns Ratio
± 1%
Inductance³ Leakage
µH min Inductance⁴
(1 - 6)
(1-6) :(3-4)¹ (1-6) : (3-5)²
(1 - 6)
µH max
Ω
max
DCR
(2-5)
Ω
max
(3-4)
Interwinding
Capacitance
Surge Voltage
Capability²
Metallic Longitudinal
Ω
max
pF typ
V peak
V peak
2795M
1:1
1 : 2 CT
42
0.1
0.2
0.2
0.2
10
4000
2500
1. with 2 & 3 connected and 4 & 5 connected
2. with 2 and 4 connected
3. measured at 10 kHz, 0.1 Vac
4. measured at 100 kHz, 0.1 Vac
Typical Frequency and Time Response
Terminating
Impedances
Bandwidth
(3 dB)
Risetime
75Ω : 75Ω & 75Ω : 300Ω 150 kHz - 350 MHz 0.8 ns
SCHEMATICS
2795M
5
6
5
4
6
2
1
2
3
4
1
3
©2000 Bel Fuse Inc. Specifications subject to change without notice. 04.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
T1-115