CS61574A/75 Cirrus Logic, Inc., CS61574A/75 Datasheet - Page 39

• Manufacturer Part Number: CS61574A/75
• Description: T1/E1 Line Interface Unit for Stratum-4 applications
• Manufacturer: Cirrus Logic, Inc.

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