VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7991
Features
• Maximum Rise/Fall Times of 38ps
• High-Speed Operation
(Up to 10.7Gb/s NRZ Data)
• Differential Inputs
SONET/SDH 10.7Gb/s
Electroabsorption Modulator/Laser Diode Driver
• Single-Supply
• CML-Compatible Data Inputs
• On-Chip 50Ω Input Terminations
• 50Ω Output Impedance
General Description
The VSC7991 is a single 7V supply, 10.7Gb/s Electroabsorption Modulator (EAM)/laser diode driver with
direct access to the laser modulation FETs. Laser offset and modulation currents are set by external components
allowing precision monitoring and setting of the voltage levels. Data inputs are differentially terminated to 50Ω.
Applications
• SONET/SDH @ 2.488Gb/s, 9.952Gb/s, 10.7Gb/s
VSC7991 Block Diagram
60Ω
(1)
60Ω
(1)
50Ω
(1)
DIN
50Ω
(1)
NDOUT
DOUT
300Ω
(1)
NDIN
DCC
Note: (1) On-die components.
VIP
IMOD
300Ω
(1)
IB
IBN
IP
G52321-0, Rev 2.3
02/26/01
©
VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
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VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
