VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
SONET/SDH 10.7Gb/s
Electroabsorption Modulator/Laser Diode Driver
VSC7991
Table 6: Pin Identifications
Pin #
Name
Type
Level
Description
1
GND
GND
NDIN
GND
GND
DIN
Pwr
Pwr
In
Pwr
Pwr
CML
Pwr
Pwr
CML
Pwr
Pwr
Pwr
DC
Positive Voltage Rail
2
Positive Voltage Rail
3
Complementary Data In
Positive Voltage Rail
4
Pwr
Pwr
In
5
Positive Voltage Rail
6
Data In
7
GND
GND
GND
DCC
VSS
Pwr
Pwr
Pwr
In
Positive Voltage Rail
8
Positive Voltage Rail
9
Positive Voltage Rail
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Duty-Cycle Control Voltage
Negative Voltage Rail
Negative Voltage Rail
Modulation Control Voltage
Modulation Current Monitor
Data Offset Control Current (complementary)
Positive Voltage Rail
Pwr
Pwr
In
Pwr
Pwr
DC
VSS
VIP
IP
In
DC
IBN
In
DC
GND
GND
GND
NDOUT
GND
GND
DOUT
GND
GND
GND
IB
Pwr
Pwr
Pwr
Out
Pwr
Pwr
Out
Pwr
Pwr
Pwr
In
Pwr
Pwr
Pwr
Positive Voltage Rail
Positive Voltage Rail
Laser Modulation Current Output (complementary)
Positive Voltage Rail
Pwr
Pwr
Positive Voltage Rail
Laser Modulation Current Output
Positive Voltage Rail
Pwr
Pwr
Pwr
DC
Positive Voltage Rail
Positive Voltage Rail
Data Offset Control Current
Positive Voltage Rail
GND
GND
VSS
Pwr
Pwr
Pwr
Pwr
Pwr
Pwr
Pwr
Pwr
Pwr
Pwr
Pwr
Pwr
Positive Voltage Rail
Negative Voltage Rail
Negative Voltage Rail
Positive Voltage Rail
VSS
GND
GND
Positive Voltage Rail
NOTE: A voltage HIGH on the data input (pin 6) corresponds to a voltage HIGH on the data output (pin 22).
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
G52321-0, Rev 2.3
02/26/01
Page 7
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
