ISDN MAGNETICS
Dual S Interface Transformers
•
•
Low profile 0.175" package
Compatible with PC card applications
•
•
•
TM9938
Minimum interwinding breakdown voltage of 1500 Vrms
Qualified per Bellcore TR-TSY-000357-1
UL and CSA approved
ELECTRICAL SPECIFICATIONS at 25° C
DCR
Ω
max
Pri
2800A
2800B
2800C
2800D
2800E
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
4.75
5.0
3.75
2.50
5.00
6.0
6.0
6.0
6.0
6.0
Sec
10.5
8.5
8.5
8.5
6.0
100
100
100
100
100
Part Number
Turns Ratio
± 2%
Primary
Inductance*
mH min
Leakage
Inductance
µ
H max
Interwinding
Capacitance
pF max
Distributed
Parallel
Capacitance
pF max
100
100
100
100
100
* Measured at 10 kHz, 0.5 Vac
Compatible Transceiver ICs
Part Number
IC Manufacturer
IC Part Number
T7250C
T7256
T7234
T7901
T7903
PEB2081
PEB2085
PEB2086
MT8930
TP3420
TP3421
MTC-2072
79C30A
79C32A
MC145474
MC145475
SCHEMATIC
1
2800A
2800B
2800C
2800D
2800E
T1
16
2800A
Lucent
2
3
15
14
2800B
Lucent
4
T2
5
13
Siemens
Mitel
2800C
National
Semiconductor
Alcatel
12
6
7
11
10
2800D
AMD
2800E
Motorola
8
Primary
©1999 Bel Fuse Inc.
9
Secondary
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
T328
BEL [ BEL FUSE INC. ]
