VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
SONET/SDH 10.7Gb/s
Laser Diode Driver
VSC7990
Table 7: Pad Locations for VSC7990 Die
Pin #
Signal Name Signal Type
Levels
Description
1
VTHD
VDD
DIN
—
—
I
—
0V
ECL(1)
Input Bias Threshold Adjust, True
Ground
2
3
Data Input, True
Ground
4
VDD
NDIN
VDD
CLK
—
I
0V
5
ECL(1)
0V
ECL(1)
Data Input, Complement
Ground
6
—
I
7
Clock Input, True
Ground
8
VDD
CLKN
VDD
VDD
VDD
VDD
CLKSEL
VDD
NC
—
I
0V
9
ECL(1)
0V
Clock Input, Complement
Ground
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
—
—
—
—
I
0V
Ground
0V
Ground
0V
Ground
—
Clock Select (see Table 5)
Ground
—
—
I
0V
—
No Connection
Duty Cycle Control, Positive
Duty Cycle Control, Negative
Modulation Output Enable
Power Supply
Power Supply
Modulation Current Monitor
Modulation Set Voltage
Ground
PWP
PWN
MOD_EN
VSS
—
I
—
I
ECL
–5.2V
–5.2V
—
—
—
O
VSS
MIP
VIP
I
—
VDD
VDD
VDD
VDD
NC
—
—
—
—
—
—
O
0V
0V
Ground
0V
Ground
0V
Ground
—
No Connection
Ground
VDD
NIOUT
VDD
IOUT
VDD
NC
0V
—
Modulation Current Out, Complement
Ground
—
O
0V
—
Modulation Current Out, True
Ground
—
—
—
—
—
0V
—
No Connection
Ground
VDD
VDD
VDD
0V
0V
Ground
0V
Ground
© 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 8
G52303-0, Rev 2.2
04/05/01
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
