ds26504 Maxim Integrated Products, Inc., ds26504 Datasheet - Page 93

• Manufacturer Part Number: ds26504
• Description: Ds26504 T1/e1/j1/64kcc Bits Element
• Manufacturer: Maxim Integrated Products, Inc.

Figure 13-5. Software-Selected Termination, Longitudinal Protection
Table 13-2. Component List (Software-Selected Termination, Longitudinal
Protection)
RING
RING
TIP
TIP
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
RX
TX
TX
RX
S3, S4, S5, S6
T1 and T2
T3 and T4
S1 and S2
S7 and S8
F1 to F4
NAME
F2
F3
F4
F1
T3 and T4 are optional. For more information, contact the Telecom Support Group at [e-mail].
A list of alternate transformer part numbers and manufacturers is available at [e-mail].
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 S2/S3 pair and the S4/S5 pair should be at least 50 mils wide to conduct the extra
current from a longitudinal power-cross event.
S8
S7
1.25A slow blow fuse
Transformer 1:1CT and 1:136CT (5.0V, SMT) (Note 2)
Transformer 1:1CT and 1:2CT (3.3V, SMT) (Note 2)
25V (max) transient suppressor (Note 1)
180V (max) transient suppressor (Note 1)
40V (max) transient suppressor
Dual common-mode choke (SMT)
S3
S4
S5
S6
T3
T4
1:1
93 of 128
T1
2:1
T2
DESCRIPTION
60
S1
S2
10uF
0.1 uF
60
RRING
TTIP
TRING
RTIP
DS26504 T1/E1/J1/64KCC BITS Element
DS26504
DVDD
RVDD
DVSS
TVDD
RVSS
TVSS
0.1 uF
0.1 uF
0.01 uF
3.3 V
3.3 V
0.1 uF
68 uF