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CS61575 Datasheet(PDF) 39 Page - Cirrus Logic

Part # CS61575
Description  T1/E1 LINE INTERFACE
PDF  44 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS61575 Datasheet(HTML) 39 Page - Cirrus Logic

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NOTES:
1. A letter at the intersection of a row and column in Table 2 indicates
that the selected transformer is supported for use with the device.
The transformer is installed in the evaluation board with pin 1 po-
sitioned to match the letter illustrated in the drawing to the left.
2.
The receive transformer (RX) is soldered at location T2 on the
evaluation board and is used for all applications. The transmit
transformer (TX) is socketed at location T1 on the evaluation
board and may be changed according to the application.
3.
For use in 100
Ω T1 twisted-pair applications only.
4.
For use in 75
Ω and 120Ω E1 applications only. Place jumper JP5
in position F-F for 75
Ω E1 applications requiring a 1:1 turns ratio.
5. Transmitter return loss improves when using a 1:2 turns ratio trans-
former with the appropriate transmit resistors.
Table 2. Transformer Applications
TRANSFORMER
(Turns Ratio)
1,2
LINE INTERFACE UNIT
’34
’35
’35A
’58
’58A
’74,’77
’74A
’75
’304A,
’305A
RX TX RX TX RX TX RX TX RX TX RX TX RX TX RX TX RX TX
PE-65351 (1:2CT)
A
D
A
D
A
A
D
A
A
D
A
A
A
Schott 12930 (1:2CT)
B
C
B
C
B
B
C
B
B
C
B
B
B
PE-65388 (1:1.15)
D
3
D
3
D
3
D
3
D
3,5
Schott 12931 (1:1.15)
C
3
C
3
C
3
C
3
C
3,5
PE-65389 (1:1:1.26)
D
4
D
4
D
4
D
4
D
4,5
Schott 12932 (1:1:1.26)
C
4
C
4
C
4
C
4
C
4,5
PE-64951 (dual 1:2CT)
E
E
E
E
Schott 11509 (dual 1:2CT)
E
E
E
E
PE-65565 (dual 1:1.15 & 1:2CT)
E
3
E
3
E
3
E
3
E
3,5
Schott 12531 (dual 1:1.15 & 1:2CT)
E
3
E
3
E
3
E
3
E
3,5
PE-65566 (dual 1:1:1.26 & 1:2CT)
E
4
E
4
E
4
E
4
E
4,5
Schott 12532 (dual 1:1:1.26 & 1:2CT)
E
4
E
4
E
4
E
4
E
4,5
E
T2
T1
D
A
C
B
T2
T1
LINE INTERFACE EVALUATION BOARD
DS40DB3
39



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