VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
SDH/SONET 10.7Gb/s
Electroabsorption Modulator/Laser Diode Driver
VSC7991
AC Characteristics (Over recommended operating conditions)
Table 1: High Speed Inputs /Outputs
Symbol
Parameter
Min
Typ
Max
Units
Conditions
50MHz to 10GHz
50MHz to 10GHz
IRL
Input Return Loss, 50Ω System
Output Return Loss, 50Ω System
−15
−12
dB
dB
ORL
Table 2: Laser Driver AC Electrical Specifications
Symbol
Parameter
Min
Typ
Max
Units
Conditions
50Ω load, 20% to 80%, VMOD
= 3V
tR tF
Output Rise and Fall Times
38
ps
Jitter
Output Jitter
15
ps/p-p 50Ω Load, VMOD = 3V
Overshoot/Undershoot
−10
−25
+10
%
DCC in the range of VSS
−
Duty-Cycle
+25
%
0.5V to VSS +2V
DC Characteristics (Over recommended operating conditions)
Table 3: Power Dissipation
Symbol
Parameter
Min
Typ
Max
Units
Conditions
VSS = −6.8, RL = 50Ω to GND,
MOD = 120mA, VBIAS = 0V
IVSS
Power Supply Current (VSS
)
300
330
mA
I
VSS = −6.8, RL = 50Ω to GND
IMOD = 120mA, VBIAS = 0V
PD
Total Power Dissipation
2040
2244
mW
Table 4: Laser Driver DC Electrical Specifications
Symbol
Parameter
Min
Typ
Max
Units
Conditions
VBIAS
VMOD
VOCM
IB, IBN
Programmable Output Offset Voltage
Modulation Voltage Amplitude
Output Voltage Compliance
−0.8
0
3
V
V
V
V
1.5
4
Laser Bias Control Voltage
−10
0
VSS
0.7
+
VIP
Laser Modulation Control Voltage
VSS
V
VIH
VIL
Input High Voltage
Input Low Voltage
Input Voltage Swing
−150
−1.00
450
0
mV
V
−0.60
1000
(1)
VSW
mVp-p
VSS
0.5V
−
VSS
2V
+
DCC
Duty-Cycle Control
NOTE: DIN and NDIN inputs need to be driven differentially. If single-ended drive is desired, it is necessary to add a DC bias to the unused pin.
© 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 2
G52321-0, Rev 2.3
02/26/01
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
