VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC8162
Features
鈥?2.488Gb/s 1:16 Demux with Integrated Clock and
Data Recovery
鈥?Recovered Clock and Data Available
鈥?Monolithic Phase Locked Loop
鈥?Digitally Adjustable Serial Data Sampling Point
2.488 Gbit/sec SONET/SDH
1:16 Demux with Clock Recovery
鈥?Differential Low Speed Outputs
鈥?Differential/Single-ended Reference Clock
鈥?Loss of Lock Detection
鈥?Meets SONET OC-48 and SDH STM-16 Jitter
Tolerance Requirements
General Description
The VSC8162 combines a clock recovery unit (CRU) with a 1:16 demultiplexer on a single chip to directly
generate 16-bit wide data from an incoming 2.488Gb/s NRZ data stream. An on-chip Phase Locked Loop (PLL)
generates a 2.488GHz clock which remains phase locked to the incoming data. The incoming data is retimed
and demultiplexed to a 16-bit word. A Loss of Lock (LOL) signal indicates gross conditions where incoming
data no longer has suf鏗乧ient transitions to keep the CRU in lock.
VSC8162 Functional Block DIagram
RTDO+
RTDO鈥?/div>
DINVERT
D0+
D0鈥?/div>
DI+
DI鈥?/div>
REFCK+
REFCK鈥?/div>
Clock
Recovery
Data
Retime
Output Register
D15+
D15鈥?/div>
PARITY+
PARITY鈥?/div>
5
PADJ[4:0]
Divide
by 16
CLK16+
CLK16鈥?/div>
CLKO+
CLKO鈥?/div>
LOL
NOREF
G52209-0, Rev. 2.0
9/14/98
漏
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 鈥?805/388-3700 鈥?FAX: 805/987-5896
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