VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7928
Features
• Rise Times Less Than 100ps • High Speed Op...
VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7928
Features
Rise Times Less Than 100ps High Speed Operation (Up to 3.2Gb/s NRZ Data) Differential or Single-Ended Inputs Single Supply ECL Compatible Clock and Data Inputs Direct Access to Modulation and Bias FETs Data Density Monitors On-chip Reclocking Register On-chip Mux for Clocked or Non-clocked Applications On-chip 50Ω Input Termination: Clock and Data Enhanced Pinout
SONET/SDH 3.2Gb/s Laser Diode Driver
Applications
SONET/SDH @ 622Mb/s, 1.244Gb/s, 2.488Gb/s, and 3.125Gb/s Full Speed Fibre Channel (1.062Gb/s)
General Description
The VSC7928 is a single 5V supply, 3.2Gb/s laser diode driver with direct access to the laser modulation and bias FETs. Laser bias and modulation currents are set by external components allowing precision monitoring and setting of the current levels. Data density outputs are provided to allow the user to adjust the laser bias in high unbalanced data applications. Clock and data inputs are differentially terminated to 50Ω.
VSC7928 Block Diagram
MK NMK NIOUT DIN 50 Ω** DINTERM* 50 Ω** NDIN DCC CLK 50 Ω** CLKTERM* 50 Ω ** NCLK SEL MIP *Terminated to Off-chip Capacitor **On Die Components MIB VIB VIP IMOD IBIAS M U X IOUT
D Q
IBIAS
G52246-0, Rev 3.0 04/05/01
© VITESSE SEMICONDUCTOR CORPORATION 741 Calle Plano Camarillo, CA 93012 Tel: (800) VITESSE FAX: (805) 987-5896 Email:
[email protected] Internet: www.vitesse.com
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