VITESSE
SEMICONDUCTOR CORPORATION
Datasheet
VSC8074
Features
鈥?Performs 1:16 DEMUX Between 10Gb/s High-
Speed Signal and 16 622Mb/s Low-Speed Signals
鈥?Fully Differential Low-Speed Interface
鈥?Industry Standard 鈥?.2V Power Supply
鈥?50鈩?Output Drive Capability
10Gb/s 16-Bit Demultiplexer for
STS-192 and STM-64 Applications
鈥?Internal Input Terminations
鈥?Industry-Standard 80-Pin PQFP Package
鈥?Proven E/D Mode GaAs Technology
鈥?Supports STS-192 SONET Applications
Typical System Block Diagram
PU
D0 - D15鹵
Frame
Processor
CLK16I鹵
CLKI
VSC8073
DOUT鹵
CLK16O鹵
E/O
O/E
PD
DI鹵
CLKI
VSC8074
CLK16O鹵
Q0 - Q15鹵
Frame
Processor
General Description
The VSC8074 accepts a differential 10Gb/s serial input data stream (DI鹵). Using a 10GHz clock input
(CLKI), the high-speed data stream is demultiplexed into 16 differential 622Mb/s parallel outputs (Q0-Q15鹵).
In addition to the data outputs, a differential 622MHz clock output (CLK16O鹵) is provided. The device oper-
ates using a 鈥?.2V power supply and is packaged in a thermally-enhanced, standard plastic package.
Functional Block Diagram
Q0+
Q0鈥?/div>
DI+
DI鈥?/div>
1:16
Demultiplexer
DQ
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Q1+
Q1鈥?/div>
Q15+
Q15鈥?/div>
CLK16O+
CLK16O鈥?/div>
CLKI/2
Timing
Generator
CLKI/16
CLKI
G52280-0, Rev. 4.0
3/29/00
漏
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 鈥?805/388-3700 鈥?FAX: 805/987-5896
Page 1
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