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Details, datasheet, quote on part number:2795L
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Datasheet text preview:
HIGH FREQUENCY MAGNETICS
T1/E1 Miniature Surface Mount Tranformers
· Meet pulse template and return loss requirements of T1/ · E1 interface circuits · Designed to meet stringent requirements of low-voltage · applications Maximum inductance unbalance of center-tapped windings is 0.2% 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
TM00143
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ELECTRICAL SPECIFICATIONS at 25° C
Part Number
Turns Ratio ± 1%
Primary Inductance1 mH min
Leakage Inductance2 µH max (4 - 6)
DCR max
Surge Voltage Capability3 Interwinding Capacitance pF typ (3 - 1) 2.3 3.7 3.8 3.7 35 45 47 45
Metallic V peak 3000 2500 2500 2500
Longitudinal V peak 2500 2500 2500 2500
Pri : Sec 2795K 2795H 2795L 2795J 1 : 1.93CT 1 : 2CT 1 : 2.1CT 1 : 2.45CT 0.810 1.34 1.1 0.950 0.4 0.5 0.6 0.4
1.2 1.8 1.8 1.5
1. measured at 10 kHz, 0.5 Vac 2. measured at 100 kHz, 0.1 Vac 3. See Supplementary Information 4. measured at 10 kHz, 0.1 Vac
SCHEMATIC
Minimum Return Loss for 2795J and 2795K used with Lucent 3.3 volt transceivers
Frequency Interface
2795H 2795J 2795K 2795L
4
51 kHz 102 kHz 2 MHz 3 MHz
3 2 CT
Receive
14 dB
20 dB
20 dB
16 dB
6
Transmit1 9 dB 15 dB 15 dB 11 dB
1 Secondar y
Primar y
1. For transmit, only, place external capacitor of 470 pF ± 10% across winding (4-6)
©2000 Bel Fuse Inc. Specifications subject to change without notice. 04.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 · Tel 201-432-0463 · Fax 201-432-9542 · www.belfuse.com T1-95
HIGH FREQUENCY MAGNETICS
TM00143
T1/E1 Miniature Surface Mount Tranformers
MECHANICAL
0.240 [6.10] max 6 5 4 A 0.186 [4.72] 0.265 [6.73] ref 0.350 [8.90] max 0.073 [1.85] 0.040 [1.02] 0.065 [1.65] 2795H 2795J 2795K 2795L
0.057 [1.45]
A Terminal 1 ID 1 0.020 [0.51] 2 3 0.073 [1.85] 0.364 0.234 [9.25] [5.95] No metallization or solder mask in cross-hatched designated area
0.265 [6.73] max 0.055 [1.40] 0°/8°
0.033 [0.84]
Suggested PCB Pad Layout
Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters].
0.015 [0.40]
R 0.023 [0.60]
Supplementary Information Safety Agency Compatibility Surge Voltage Capability Flammability Compliance Simulation Model Surface-Mount Packaging
Terminal Lead Coplanarity PWB Process Capability
Underwriters Laboratories, Inc. UL 1950 10/700 µs; 10 repetitions of alternating polarity, generator output: peak voltage, 25 source IEC-695, 2-2 (needle flame test), materials are UL 94 VO approved SPICE computer simulation file available on request Tape and Reel; 16 mm wide by 12 mm pitch; 13 inch OD; 4 inch ID 650 transformers per reel, maximum Meets ANSI/EIA 481-2 Carrier Tape Standards--JEDEC SO package 0.004 inch [0.10 mm] Machine placement (recommendation: locate by terminals, not body)
©2000 Bel Fuse Inc. Specifications subject to change without notice. 04.00
CORPORATE
Bel Fuse Inc. 198 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
FAR EAST
Bel Fuse Ltd. 8F / 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com
EUROPE
Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com
T1-96
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