VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7927
SONET/SDH 2.5Gb/s Laser Diode Driver
Figure 1: On-chip Data and Clock Input Configuration
DIN
(CLK)
X
DINTERM
(CLKTERM)
X
NDIN
(NCLK)
X
* 50
* 50
*On-chip
Components
GND
* 4.0K
* 6.4K
VSS
GND
DATA BUFFER
(CLOCK BUFFER)
VSS
DINTERM to -2.0V for Differential ECL Inputs
Figure 2: Single-Ended Operation
DATA
SOURCE
CLOCK
SOURCE
0.1µf
0.1µf
0.1µf
7927
DIN
DINTERM
NDIN
GND
0.1µf
GND
CLK
CLKTERM
NCLK
0.1µf
0.1µf
GND
GND
G52201-0, Rev 3.0
04/05/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 5