TEW4994 Datasheet, PDF (1/1 Pages) Filtran LTD – CEPT /T1 input/output Transformer

CEPT /T1
input/output Transformer
TEW 4994
TEW4994 is designed to be used either as a
transmit or a receive transformer in the ISDN
primary access network, interfacing SIEMENS
PEB2235 and PEB2236 to a 75, 100 or 120 ohm
line.
When in transmit mode, connect the two primary
windings in parallel, pin 1 to 2 and pin 5 to 6.
When in receive mode, connect the two primary
MECHANICAL
windings in series, pin 5 to pin 2, thus forming a
center tap at pin 5/2.
Typical applications are:
• Primary rate ISDN network nodes.
• PBX or computer to T1/CEPT Digital trunks.
• TDM Multiplexers.
0.50
MAX
0.50 MAX
DIMENSIONS ARE
IN INCHES
0.10 MIN
DIA 0.025
All dimensions
are in inches
0.45 MAX
8
5
WHITE DOT
1
4
WHITE DOT
AT PIN 1
DRILL 0.040
8 PLACES
GRID 0.10 x 0.10
Drill
0.040"
8 Places
4
1
5
Line
2
8
6
TEW4994, -1 and -2
Com. 4
Line
75 Ω 7
120 Ω 8
1
5
2
6
TEW4994-3
ELECTRICAL SPECIFICATIONS
Line Impedance
Inductance (mH)
(4-8)
Turns ratio
(1-5):(2-6):(4-8)
(1-5):(2-6):(4-7)
Pulse Mask
Longitud. Bal.
Return Loss
Dielectric Strength (V rms)
TEW4994
75 Ω
> 2.0
1:1:1.57
CEPT
I.431
G.703
1500
TEW4994-1
100 Ω
> 3.4
1:1:2.67
T1/DS1
T1.408
T1.408
1500
TEW4994-2
120 Ω
> 2.0
1:1: 2
CEPT
I.431
G.703
1500
TEW4994-3
75/120 Ω
> 2.0
1:1:2
1:1:1.57
CEPT
I.431
G.703
1500
Filtran Limited
229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3,
Tel : [phone] Fax : [phone]
2-23