VITESSE

SEMICONDUCTOR CORPORATION

Advance Product Information

VSC7991

SDH/SONET 10.7Gb/s

Electroabsorption Modulator/Laser Diode Driver

Page 2

G52321-0, Rev 2.3

02/26/01

© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012

Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com

Internet: www.vitesse.com

Table 1: High Speed Inputs /Outputs

Table 2: Laser Driver AC Electrical Specifications

Table 3: Power Dissipation

Table 4: Laser Driver DC Electrical Specifications

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.

Symbol

Parameter

Min

Typ

Max

Units

Conditions

IRL

Input Return Loss



−15



dB

50MHz to 10GHz

ORL

Output Return Loss, 50

Ω System



−12



dB

50MHz to 10GHz

Symbol

Parameter

Min

Typ

Max

Units

Conditions

Output Rise and Fall Times



38

ps

50

Ω load, 20% to 80%, V

MOD

= 3V

Jitter

Output Jitter



15

ps/p-p

50

Ω Load, V

Overshoot/Undershoot

−10



+10

%

Duty-Cycle

−25



+25

%

Symbol

Parameter

Min

Typ

Max

Units

Conditions



300

330

mA

Total Power Dissipation



2040

2244

mW

Symbol

Parameter

Min

Typ

Max

Units

Conditions

Programmable Output Offset Voltage

−0.8



0V

Modulation Voltage Amplitude

1.5



3V

Output Voltage Compliance



4



V

IB, IBN

Laser Bias Control Voltage

−10



0V

Laser Modulation Control Voltage



0.7

V

Input High Voltage

−150



0mV

Input Low Voltage

−1.00



−0.60

V

(1)

Input Voltage Swing

450



1000

mVp-p

DCC

Duty-Cycle Control

0.5V



2V