VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7923
Features
• Rise Times Less Than 100ps
• High Speed Operation (Up to 2.4Gb/s NRZ Data)
• Single-Ended or Differential Input Operation
• Single Power Supply
• Direct Access to Modulation and Bias FETs
• Data Density Monitors
SONET/SDH 2.5Gb/s Laser Diode Driver
Applications
• SONET/SDH at 622Mb/s, 1.244Gb/s,
2.488Gb/s, 3.125Gb/s
• Full-Speed Fibre Channel (1.062Gb/s)
General Description
The VSC7923 is a single 5V supply, 2.4 Gb/s laser diode driver with direct access to the laser modulation and
bias FET’s. Laser bias and modulation currents are set by external components allowing precision monitoring
and setting of the current levels. Data inputs accept ECL levels. Data density outputs are provided to allow the
user to adjust the laser bias in high unbalanced data applications.
VSC7923 Block Diagram
IOUT
NIOUT
MK
NMK
DIN
VREF
IMOD
VIP
IBIAS
VIB
MIP
MIB
G52203-0, Rev 3.0
05/11/01
©
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 ]
