ds3102 Maxim Integrated Products, Inc., ds3102 Datasheet - Page 7

• Manufacturer Part Number: ds3102
• Description: Stratum 3 Timing Card Ic With Synchronous Ethernet Support
• Manufacturer: Maxim Integrated Products, Inc.

2.
Figure 2-1. Typical Application Example
Rev: 012108
____________________________________________________________________________________________ DS3102
divide line clock down
typically 19.44 MHz
send to timing cards
or multidrop buses
to backplane rate,
point-to-point
Application Example
Backplane
<1>
<N>
<1>
<N>
<N>
<0>
<1>
<N>
<0>
<1>
select best system clock,
hitless switching,
N
N
N
N
basic holdover
Timing Card (1 of 2)
Timing Card (2 of 2)
Line Card (1 of N)
Line Card (N of N)
controller
TCXO or
OCXO
micro
DPLL
monitoring, select highest
activty and frequency
priority valid input
multiplication,
jitter cleanup
DS3102
T0 APLL
Monitor,
Selector
Divider,
APLL
clock
Identical to Timing Card 1
to port SERDES
T4 DPLL
T0 DPLL
create derived DS1 or E1/2048
kHz clock from 19.44 MHz
frequency locked to line clock
T4 APLL
Monitor,
Selector
Divider,
BITS
BITS
BITS
BITS
Rx
Rx
Tx
Tx
DS1, E1 or
2048 kHz
DS1, E1 or
2048 kHz
from BITS/SSU
to BITS/SSU
clock/data recovery,
equalizer, framer,
extract SSMs
Stratum 3:
jitter/wander filtering,
hitless switching,
phase adjust,
holdover
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