zl30138 Zarlink Semiconductor, zl30138 Datasheet - Page 9

• Manufacturer Part Number: zl30138
• Description: Oc-192/stm-64 Sonet/sdh/10gbe Stratum 2/3/3e System Synchronizer/sets
• Manufacturer: Zarlink Semiconductor

Alternatively, the ZL30138 could be used in systems that were not designed with central timing cards in mind. In this
case, the ZL30138 provides all of the features required to meet both the timing card and the line card functions in
one package. This application is shown in Figure 3. DPLL1 recovers the reference clock from the backplane and
filters wander. The APLL and the P0 synthesizer filter jitter and generate transmit clocks for a SONET/SDH/10GbE
PHY (up to OC-192/STM-64) and/or a PDH PHY (T1/E1, DS3/E3, etc). DPLL2 is used to recover the line timing
reference, filter jitter, and translate its frequency to the rate required by the backplane.
ZL30138
DS3/E3
PHY
T1/E1
P0
A
DPLL1
SONET/SDH
APLL
B
10GbE
PHY
Figure 3 - The ZL30138 as a Timing Card and a Line Card Device
DPLL2
P1
A
Card
Line
ZL30138
Zarlink Semiconductor Inc.
DS3/E3
PHY
T1/E1
System Timing Bus
P0
ZL30138
A
DPLL1
12
SONET/SDH
APLL
B
10GbE
PHY
DPLL2
P1
Card
Line
ZL30138
Short Form Data Sheet
DS3/E3
PHY
T1/E1
P0
A
DPLL1
SONET/SDH
APLL
B
PHY
GbE
DPLL2
P1
B
Card
Line