VSC7928

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 Page 1 VITESSE SEMICON...