VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
SONET/SDH 2.5Gb/s Laser Diode Driver
VSC7927
Figure 1: On-chip Data and Clock Input Configuration
GND
GND
DATA BUFFER
(CLOCK BUFFER)
DIN
(CLK)
X
50
50
4.0K
6.4K
*
*
*
*
DINTERM
X
X
(CLKTERM)
NDIN
(NCLK)
*On-chip
Components
VSS
VSS
DINTERM to -2.0V for Differential ECL Inputs
Figure 2: Single-Ended Operation
7927
0.1µf
DATA
SOURCE
DIN
DINTERM
NDIN
0.1µf
0.1µf
0.1µf
GND
GND
GND
GND
0.1µf
CLOCK
SOURCE
CLK
CLKTERM
NCLK
0.1µf
G52201-0, Rev 3.0
04/05/01
Page 5
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