ISDN MAGNETICS
U
PO
Interface Transformer
TM00209
•
Qualified per Bellcore TR-TSY-000357-1
•
Minimum interwinding breakdown voltage of 1500 Vrms
ELECTRICAL SPECIFICATIONS at 25° C
Part Number
Turns Ratio
± 2%
Primary
Inductance*
mH min
Leakage
Inductance
µ
H max
Pri
DCR
Ω
max
Interwinding
Capacitance
pF max
Sec
2771J
1CT : 1.25
1.7
9.5
3.3
10.2
75
* Measured at 10 KHz, 0.1 Vac
SCHEMATIC
Compatible Transceiver ICs
Part Number
IC Mfr
IC Part Number
2771J
8
1
2
7
3
2771J
Siemens
PEB2095
6
CT
5
Primary
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 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
T2-21
ISDN MAGNETICS
TM00209
U
PO
Interface Transformer
MECHANICAL
2771J
0.160 [4.06]
ref
8
5
0.120 [3.05]
ref
0.495
[12.57]
max
0.430
[10.92]
max
Terminal 1
Identifier
1
0.590 [15.00] max
4
0.030
[0.76]
0.395
[10.03]
max
0.100 [2.54]
typ
0.024 [0.61]
Component
Center
8
0.255
[6.48]
1
0.120 [3.05]
typ
0.045 [1.14]
typ
7
6
5
2
3
4
0.008 [0.203]
2 places
Suggested PCB Pad Layout
Note: Unless otherwise specified, dimensions
are nominal and in inches [millimeters].
©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
T2-22
