zl30130 Zarlink Semiconductor, zl30130 Datasheet - Page 9

• Manufacturer Part Number: zl30130
• Description: Oc-12/stm-4 Sonet/sdh/gbe Stratum 2/3/3e System Synchronizer/sets
• Manufacturer: Zarlink Semiconductor

Alternatively, the ZL30130 could be used in systems that were not designed with central timing cards in mind. In this
case, the ZL30130 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/GbE
PHY (up to OC-12/STM-4) 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.
ZL30130
DS3/E3
PHY
T1/E1
P0
A
DPLL1
SONET/SDH
APLL
B
PHY
GbE
Figure 3 - The ZL30130 as a Timing Card and a Line Card Device
DPLL2
P1
A
Card
Line
ZL30130
Zarlink Semiconductor Inc.
DS3/E3
PHY
T1/E1
System Timing Bus
P0
ZL30130
A
DPLL1
12
SONET/SDH
APLL
B
PHY
GbE
DPLL2
P1
Card
Line
ZL30130
DS3/E3
Short Form Data Sheet
PHY
T1/E1
P0
A
DPLL1
SONET/SDH
APLL
B
PHY
GbE
DPLL2
P1
B
Card
Line