TEW4977 Datasheet, PDF (1/1 Pages) Filtran LTD – CEPT/T1 Input/Output Transformer

CEPT/T1
Input/Output Transformer
TEW4977 & -1 are designed and
approved to be used
as an Input transformer with the
following devices.
Crystal CS61534, 61535, 61574,
6158, 61535A, 61574A,
61575, 6158A.
Level One LXT 300, 301, 305,
304A,305A
Also as an Output transformer for:
Crystal CS61534, 61535, 61574 &
6158.
Level One LXT 300, 301, 305
TEW4977-2 is designed to be used as
an Output transformer, and
TEW4977-3 as an Input trf. for:
Brooktree BT8069B device
Fully encapsulated in epoxy.
Typical applications are:
• Primary rate ISDN network
nodes.
• PBX or computer to T1/CEPT
Digital trunks.
• High speed data link using
T1/CEPT Digital trunk.
• TDM Multiplexers.
BABT certified for reinforced insulation
to EN60950 & EN41003
Cert # CR/T/0052
MECHANICAL
TEW4977
6
Line side
4
1
2 Device
3
WHITE
DOT
AT PIN 1
All dimensions
are in inches
ELECTRICAL SPECIFICATION
Line Impedance (Ohms)
DCR
Turns ratio
Inductance
Longitud. Bal.
(Ohms)
(mH)
(1 - 3)
(6 - 4)
(6 - 4) : (1 - 3)
(6 : 4) : (1 - 2)
(6 - 4)
Return Loss
Dielectric Strength (Vrms)
TEW4977
75, 100
& 120
1.15 nom.
0.60 nom.
1 : 2 c.t.
—-
> 1.2
T1.408
I.431
T1.40
G.703
4000
-1
75
1.6
0.8
1 : 2 c.t.
—-
> 0 .8
I.431
G.703
BS6328
4000
-2
75, 100
& 120
0.7 nom
1.2 nom
2 : 1 c.t.
—-
> 4.8
T1.408
I.431
n/a
4000
-3
75, 100
& 120
0.7 nom
0.7 nom
1:1
—-
> 1.2
T1.408
I.431
G.703
-4
75 & 120
1.2 nom
0.7 nom
1:2
1 : 1.58
> 1.2
I.431
G.703
4000
4000
Filtran Limited
229 Colonnade Road, Nepean, Ontario, Canada, K2E 7K3
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