2798E [BEL]
ISDN MAGNETICS Dual S Interface Transformers; ISDN磁电双S接口变压器
| 型号： | 2798E |
| 厂家： | 
BEL FUSE INC. |
| 描述： | ISDN MAGNETICS Dual S Interface Transformers |
| 文件： | 总2页 (文件大小：39K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ISDN MAGNETICS
Dual S InterfaceTransformers
TM9937
•
•
Meet requirements for pulse template and impedance
template according to ITU-T (CCITT I.430)
•
•
•
Minimum interwinding breakdown voltage of 1500 Vrms
Operating temperature range 0° C to 85° C
Qualified per Bellcore TR-TSY-000357-1
UL and CSA approved
ELECTRICAL SPECIFICATIONS at 25° C
DCR
Ω
max
Distributed
Primary
Inductance
mH min
Leakage
Inductance
µH max
Interwinding
Capacitance
pF max
Turns Ratio
Parallel
Capacitance
pF max
Part Number
± 2%
Pri
Sec
2798A
2798B
2798C
2798D
2798E
1.0 : 2.5
1.0 : 2.0
1.0 : 2.0
1.0 : 2.0
1.0 : 1.0
22.0
22.0
22.0
22.0
22.0
5.0
5.0
3.5
3.5
7.5
6.0
100
100
100
100
100
100
100
80
3.75
2.5
2.25
3.5
4.45
6.0
100
40
5.0
3.5
3.5
SCHEMATIC
T1
Compatible Transceiver ICs
IC Manufacturer IC Part Number
16
1
Part Number
2798A
2798B
2798C
2798D
2798E
T7250C
T7256
T7234
2798A
2798B
Lucent
Lucent
2
3
15
14
T7901
T7903
4
5
13
12
PEB2081
PEB2085
PEB2086
Siemens
Mitel
T2
2798C
MT8930
National
Semiconductor
TP3420
TP3421
6
7
11
10
79C30A
79C32A
2798D
2798E
AMD
MC145474
MC145475
8
9
Motorola
Primary
Secondary
©1999 Bel Fuse Inc. Specifications subject to change without notice. 06.99
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
T326
ISDN MAGNETICS
Dual S InterfaceTransformers
TM9937
0.950 [24.13] max
0.1.22 [3.10] typ
MECHANICAL
16 15 14 13 12 11 10
9
8
2798A
2798B
2798C
2798D
2798E
1
2
3
4
5
6
7
0.100 [2.54] typ
0.595
0.300
[15.11]
[7.62]
typ
max
0.015 [0.38]
0.705 [17.91]
+0.010 [0.25]
– 0.005 [0.13]
Note: Unless otherwise specified, dimensions
are nominal and in inches [millimeters].
0.030
[0.76]
Terminal Pad
0.035 [0.89]
0.755
[19.18]
typ
0.060
[1.52]
typ
0.060 [1.52] typ
0.100 [2.54] typ
Suggested PCB Pad Layout
Tape and reel packaging: 400 parts/reel
©1999 Bel Fuse Inc. Specifications subject to change without notice. 06.99
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
Bel Fuse Ltd.
Bel Fuse Europe Ltd.
198 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
8F / 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
PrestonTechnology Management Centre
Marsh Lane, Suite F23, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com
T327
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