VITESSE
SEMICONDUCTOR CORPORATION
SONET/SDH 10.7Gb/s
Laser Diode Driver
Table 6: Pad Locations for VSC7990 Die
Pin #
1
2
3
4
5
6
7
8
9
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
Advance Product Information
VSC7990
Signal Type
—
—
I
—
I
—
I
—
I
—
—
—
—
I
—
—
—
—
I
—
—
—
—
—
—
—
—
—
—
O
—
O
—
—
—
—
—
Signal Name
VTHD
VDD
DIN
VDD
NDIN
VDD
CLK
VDD
CLKN
VDD
NC
VDD
NC
CLKSEL
VDD
NC
PWP
PWN
MOD_EN
VSS
VSS
MIP
VIP
VDD
VDD
NC
VDD
NC
VDD
NIOUT
VDD
IOUT
VDD
NC
VDD
NC
VDD
Levels
—
0V
ECL
ECL
(1)
Description
Input Bias Threshold Adjust, True
Ground
Data Input, True
Ground
Data Input, Complement
Ground
Clock Input, True
Ground
Clock Input, Complement
Ground
No Connection
Ground
No Connection
Clock Select (see Table 5)
Ground
No Connection
Duty Cycle Control, Positive
Duty Cycle Control, Negative
Modulation Output Enable
Power Supply
Power Supply
Modulation Current Monitor
Modulation Set Voltage
Ground
Ground
No Connection
Ground
No Connection
Ground
Modulation Current Out, Complement
Ground
Modulation Current Out, True
Ground
No Connection
Ground
No Connection
Ground
0V
(1)
0V
ECL
(1)
0V
ECL
(1)
0V
—
0V
—
—
0V
—
—
—
ECL
–5.2V
–5.2V
—
—
0V
0V
—
0V
—
0V
—
0V
—
0V
—
0V
—
0V
Page 8
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VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
G52303-0, Rev 2.0
12/15/00
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
