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AO4450 FGF2003 2SD946AP STK0160F 1C220 GT86DT 02M91V D4148
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  Datasheet File OCR Text:
 MODEM MAGNETICS
V.90 Modem Transformers
TM00408
*
Provide isolation and balance while minimizing signal distortion and insertion loss in high-speed modem applications Qualified per Bellcore TR-TSY-000357-1 Approved by UL and CSA
*
2802A transformer is designed to match a 600 line to a 536 load 2802B transformer is designed to match a 600 line to a 301 load Minimum interwinding breakdown voltage of 1000 Vrms
* * *
*
ELECTRICAL SPECIFICATIONS at 25 C
Insertion Loss dB @ 1 kHz Frequency Response dB 200 Hz - 5 kHz Pri DCR max Sec Harmonic Distortion dB 0 dBm, 600 Hz Longitudinal Balance dB 300 Hz - 3500 Hz
Part Number
Turns Ratio 2%
Return Loss dB
300 Hz - 3500 Hz
2802A
1:1
< 0.80
> 30
< 0.1
48
48
< -82
> 60
2802B
1:1
< 2.8
> 20
< 0.2
165
170
< -90
> 60
SCHEMATIC
2802A 2802B
1
6
3 Primary
4 Secondary
(c)2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com T4-17
MODEM MAGNETICS
TM00408
V.90 Modem Transformers
TYPICAL SPICE TRANSMISSION MODEL
44 1 1.1 mH 42 4 20 pF 3 40 k 12 H 20 pF 6
2802A
145 1 2802B 20 pF 3
4.3 mH
150 6 150k 40 H 20 pF 4
MECHANICAL
0.470 [11.94] max
2802A 2802B
0.110 [2.79]
0.450 [11.43] 0.650 [16.51] max 4 6 0.025 [0.63]Square Phosphor Bronze Solder-coated
0.750 [19.05] 0.550 [13.97] Terminal 1 Identifier 3 1
Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters].
(c)2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00
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
T4-18


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