ds26524 Maxim Integrated Products, Inc., ds26524 Datasheet - Page 72
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ds26524
Manufacturer Part Number
ds26524
Description
Ds26524 Quad T1/e1/j1 Transceiver
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS26524.pdf
(273 pages)
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Figure 8-11. Network Connection for Software-Selected Termination—Longitudinal
Protection
RING
RING
TIP
TIP
RX
TX
RX
TX
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
T1 and T2
T3 and T4
S3 to S6
F1 to F4
NAME
S1, S2
S7, S8
Changing S7 and S8 to P1800SC devices provides symmetrical voltage suppresion between tip, ring, and ground.
The layout from the transformers to the network interface is critical. Traces should be at least 25 mils wide and separated
from other circuit lines by at least 150 mils. The area under this portion of the circuit should not contain power planes.
Some T1 (never in E1) applications source or sink power from the network-side center taps of the Rx/Tx transformers.
The ground trace connected to the S3/S4 pair and the S5/S6 pair should be at least 50 mils wide to conduct the extra current
from a longitudinal power-cross event.
Alternative component recommendations and line interface circuits can be found by contacting
telecom.support@dalsemi.com
The 560pF on TTIP/TRING must be tuned to your application.
F2
F3
F4
F1
S8
S7
1.25A Slow Blow Fuse
1.25A Slow Blow Fuse
25V (max) Transient Suppressor
180V (max) Transient Suppressor
40V (max) Transient Suppressor
Transformer 1:1CT and 1:2CT (3.3V, SMT)
Dual Common-Mode Choke (SMT)
S3
S4
S5
S6
DESCRIPTION
or in Application Note 324, which is available at www.maxim-ic.com/AN324.
T3
T4
1:1
T1
2:1
T2
72 of 273
60
560 pF
S1
S2
P0080SA MC
P1800SC MC
P0300SC MC
SMP 1.25
PE-68678
PE-65857
0.1 uF
F1250T
PART
60
RRING
TTIP
TRING
RTIP
Single Chip Transceiver
Line Interface Unit
DS26524 Quad T1/E1/J1 Transceiver
MANUFACTURER
Teccor Electronics
Teccor Electronics
Teccor Electronics
Teccor Electronics
Pulse Engineering
Pulse Engineering
Dallas
or
Bel Fuse
DVDD
RVDD
DVSS
TVDD
TVSS
RVSS
0.1 uF
0.1 uF
0.01 uF
NOTES
1, 4, 5
2, 3, 5
1, 5
1, 5
5
5
5
3.3 V
3.3 V
0.1 uF
68 uF
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