VSC7989
Data Sheet
SONET/SDH 10.7Gb/s Electroabsorption Modulator/Laser Diode Driver
F
EATURES
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PPLICATIONS
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Rise and Fall Times Less Than 35ps
High-Speed Operation (Up to 10.7Gb/s NRZ Data)
Differential Inputs
Single-Supply Operation
CML-Compatible Data Inputs
On-Chip 50Ω Input Terminations
50Ω Output Impedance
Extended Temperature Range Operation
SONET/SDH at 2.488Gb/s, 9.952Gb/s, 10.7Gb/s
OC-192 Transponder Modules
SONET/SDH Test Equipment
G
ENERAL
D
ESCRIPTION
The VSC7989 is a single -5.2V 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.
VSC7989 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
G52356, Rev 4.1
6/28/02
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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