DS26502LB1 Maxim Integrated Products, DS26502LB1 Datasheet - Page 91

• Manufacturer Part Number: DS26502LB1
• Description: Timers & Support Products E1-T1-J1-64KCC BITS Element 64kHz - G.70
• Manufacturer: Maxim Integrated Products

Specifications of DS26502LB1

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
www.maxim-ic.com/support.
A list of alternate transformer part numbers and manufacturers is available 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.
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
DESCRIPTION
1:1
T1
2:1
T2
91 of 125
60
S1
S2
10uF
0.1 uF
60
RRING
TTIP
TRING
RTIP
DS26502
DVDD
RVDD
DVSS
TVDD
RVSS
TVSS
0.1 uF
0.1 uF
0.01 uF
3.3 V
3.3 V
DS26502
0.1 uF
68 uF