ds26504 Maxim Integrated Products, Inc., ds26504 Datasheet - Page 92

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

13.8 Recommended Circuits
Figure 13-4. Software-Selected Termination, Metallic Protection
Table 13-1. Component List (Software-Selected Termination, Metallic
Protection)
RING
RING
TIP
Note 1:
Note 2:
Note 3:
Note 4:
TIP
RX
TX
RX
TX
T1 and T2
T3 and T4
F1 and F2
S1 and S2
S3 andS4
NAME
F2
F1
T3 and T4 are optional. For more information, contact the Telecom Support Group 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.
A list of transformer part numbers and manufacturers is available by contacting
[e-mail].
S4
S3
1.25A slow blow fuse
Transformer 1:1CT and 1:136CT (5.0V, SMT) (Note 1)
Transformer 1:1CT and 1:2CT (3.3V, SMT) (Note 1)
25V (max) transient suppressor
77V (max) transient suppressor
Dual common-mode choke (SMT)
T3
T4
DESCRIPTION
92 of 128
1:1
T1
2:1
T2
60
S1
S2
10uF
0.1 uF
60
DS26504 T1/E1/J1/64KCC BITS Element
TRING
RRING
TTIP
RTIP
DS26504
DVDD
RVDD
DVSS
TVDD
TVSS
RVSS
0.1 uF
0.1 uF
0.01 uF
3.3 V
3.3 V
0.1 uF
68 uF