ISDN MAGNETICS
U
PO
Interface Transformer
TM9939
•
•
Qualified per Bellcore TR-TSY-000357-1
Approved by UL and CSA
•
Minimum interwinding breakdown voltage of 1500 Vrms
ELECTRICAL SPECIFICATIONS at 25° C
DCR
Ω
max
Part Number
Turns Ratio
± 2%
Primary
Inductance
mH min
Leakage
Inductance
µ
H max
Pri
Interwinding
Capacitance
pF max
Sec
2805A
1.0 : 1.25
1.70
12.0
3.91
3.00
90
SCHEMATIC
Compatible Transceiver ICs
2805A
IC Mfr
IC Part Number
8
7
6
5
Primary
1
2
3
4
Secondary
Siemens
PEB2095
©1999 Bel Fuse Inc.
Specifications subject to change without notice. 09.99
Bel Fuse Inc.
198 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
T330
ISDN MAGNETICS
TM9939
U
PO
Interface Transformer
MECHANICAL
2805A
0.450
[11.43]
max
Terminal
0.020 sq.
[0.508]
0.125± 0.015
[3.17 ± 0.38]
0.200 [5.08]
Notch locates terminal #1
0.750 [19.05] max
1
0.750
[19.05]
max
4
0.600
[15.24]
8
5
Note: Unless otherwise specified, dimensions
are nominal and in inches [millimeters].
©1999 Bel Fuse Inc.
Specifications subject to change without notice. 09.99
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 F23, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com
T331