S3056 AMCC (Applied Micro Circuits Corp), S3056 Datasheet - Page 2

• Manufacturer Part Number: S3056
• Description: Multi-rate Sonet/sdh Clock Recovery Unit
• Manufacturer: AMCC (Applied Micro Circuits Corp)

S3056 OVERVIEW
The S3056 supports clock recovery for the OC-48,
Fibre Channel (2125 Mbps), OC-24, Gigabit
Ethernet, Fibre Channel (1062.5 Mbps), OC-12 or
OC-3 data rate. Differential serial data is input to the
chip at the specified rate, and clock recovery is per-
formed on the incoming data stream. An external os-
cillator is required to minimize the PLL lock time, and
provide a stable output clock source in the absence of
serial input data. Retimed data and clock are output
from the S3056.
Figure 2. S3056 Functional Block Diagram
2
S3056
RATESEL[1:0]
SERDATIP/N
REFCLKP/N
LCKREFN
TESTCLK
REFSEL
TESTEN
BYPASS
CAP 1,2
RST
SDN
2
2
FILTER
LOOP
PHASE DETECTOR
MULTI-RATE SONET/SDH CLOCK RECOVERY UNIT
DIVIDER
CLOCK
VCO
Suggested Interface Devices
Sumitomo
AMCC S3057
REFCMP
DETECTOR
LOCK
OC-48 Optical Receiver
OC-48 Transceiver
TESTOUT
October 31, 2000 / Revision J
SERCLKOP/N
LOCKDET
SERDATOP/N