VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
SDH/SONET 2.5 Gb/s
Laser Diode Driver
VSC7927
Table 8: Laser Driver AC Electrical Specifications
Symbol
Parameter
Min
Typ
Max
Units
Conditions
25 Ohm load, 20%-80%,
20mA < IMOD < 60mA,
IBIAS = 60mA
Output Rise and Fall
Times
tr tf
—
—
100
ps
tsu
th
t Setup Data to Clock
t Hold
—
20
50
50
90
—
ps
ps
—
—
Table 9: Package Thermal Specifications
Symbol
Parameter
Min
Typ
Max
Units
Conditions
θJCC
Thermal Resistance from Junction to Case
—
—
25
32
—
—
°C/W
°C/W
Ceramic Package
θJCMG
Thermal Resistance from Junction to Case
Metal Glass Package
Page 4
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
G52201-0, Rev 2.2
10/13/99
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
