2798A_00 Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – Dual S Interface Transformers

ISDN MAGNETICS
Dual S Interface Transformers
TM00200
• Meet requirements for pulse template and impedance • Minimum interwinding breakdown voltage of 1500 Vrms
template according to ITU-T (CCITT I.430)
• Operating temperature range 0° C to 85° C
• UL and CSA approved
• Qualified per Bellcore TR-TSY-000357-1
ELECTRICAL SPECIFICATIONS at 25° C
Part Number
Turns Ratio
± 2%
Primary
Inductance
mH min
Leakage
Inductance
µH max
2798A
1.0 : 2.5
22.0
5.0
2798B
1.0 : 2.0
22.0
5.0
2798C
1.0 : 2.0
22.0
3.75
2798D
1.0 : 2.0
22.0
2.5
2798E
1.0 : 1.0
22.0
5.0
DCR
Ω
max
Pri
Sec
3.5
7.5
3.5
6.0
2.25
4.45
3.5
6.0
3.5
3.5
Interwinding
Capacitance
pF max
100
100
100
100
100
Distributed
Parallel
Capacitance
pF max
100
100
80
100
40
Part Number
2798A
Compatible Transceiver ICs
IC Manufacturer
Lucent
IC Part Number
T7234
T7250C
T7254
T7256
T7259
Motorola
MC145574
2798B
Lucent
T7901
T7903
SCHEMATIC
2798A
2798B
2798C
2798D
2798E
T1
1
16
2
15
3
14
SGS Thompson
2798C
Siemens
ST5420
ST5421
PEB2080
PEB2081
PEB2084
PEB2085
PEB2086
PEB2186
4
13
T2
5
12
Mietec
Mitel
MTC-2072
MT8930
MT8931
6
11
7
10
National
Semiconductor
TP3420
TP3421
2798D
2798E
AMD
Motorola
Am79C30A
Am79C32A
MC145474
MC145475
8
Primary
9
Secondary
©2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
T2-1