VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
3.125Gb/s CML Limiting Amplifier with LOS Detect
VSC7959
Electrical Characteristics
Table 1: DC Specifications
Symbol
V
CC
I
CC
I
EE
I
CCSQ
I
EESQ
I
SQ
PSSR
Parameter
Power Supply Voltage
Power Supply Current
(1)
Power Supply Current
(1)
Power Supply Current when
Squelched
(1)
Power Supply Current when
Squelched
(1)
Squelch Input Current
Power Supply Rejection Ratio
Min
3.135
Typ
31
35
38
43
21
25
24
28
Max
5.5
Units
V
mA
mA
mA
mΑ
mA
mA
mA
mA
Conditions
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
V
CC
= 3.3V
V
CC
= 5V
f < 2MHz
0
20
30
400
µA
dB
NOTE: (1) See Figure 5 for supply current measurement setup.
Table 2: DC Specifications
Symbol
V
IN
J
D
J
R
t
R,
t
F
V
N
R
DIFF
f
L
V
SQ
V
CML
Z
O
Parameter
Data Rate
Input Voltage Range
Deterministic Jitter
Random Jitter
Rise and Fall Times
Input Referred Noise
Differential Input Resistance
Low Frequency Cutoff
Output Signal When Squelched
CML Output Voltage
Output Resistance
Min
3.125
10
Typ
Max
1200
25
8
100
230
Units
Gb/s
mV
ps
ps
ps
µV
Ω
MHz
kHz
mV
mV
mV
mV
Ω
Conditions
Peak-to-peak
See Note 1
See Note 2, RMS
20% to 80%
RMS, IN+ to IN-
IN+ to IN-
C
Z
open
C
Z
= 0.1µF
Output AC-coupled
Level = open, R
L
= 50Ω
Level = GND, R
L
= 75Ω
Squelched
Single-ended
55
100
2
2
550
1100
100
20
1200
1800
20
NOTES: (1) Deterministic jitter measured peak-to-peak with K28.5 pattern. (2) Random jitter measured with minimum input.
Page 2
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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
G52358-0, Rev 2.0
02/09/01
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
