ds26503 Maxim Integrated Products, Inc., ds26503 Datasheet - Page 90

• Manufacturer Part Number: ds26503
• Description: T1/e1/j1 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)
Note 1:
Note 2:
Note 3:
Note 4:
T1 and T2
T3 and T4
F1 and F2
S1 and S2
S3 andS4
NAME
T3 and T4 are optional. For more information, contact the Telecom Support Group at
www.maxim-ic.com/support.
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
www.maxim-ic.com/support.
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)
DESCRIPTION
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DS26503 T1/E1/J1 BITS Element