VSC7959
Data Sheet
SPECIFICATIONS
Over Recommended Operating Conditions.
Table 1. DC Specifications
Symbol
Parameter
Min
Typ
Max
5.5
37
Unit
V
Condition
V
Power Supply Voltage
Power Supply Current
3.135
CC
(1)
29
33
37
41
17
20
18
21
mA
V
V
V
V
V
V
V
V
= 3.3V
= 5V
ICC
CC
CC
CC
CC
CC
CC
CC
CC
43
mA
Power Supply Current Including Load
45
mA
= 3.3V
= 5V
IEE
(1)
Current
61
mA
mA
mA
mA
mA
µA
Power Supply Current When
29
= 3.3V
= 5V
ICCSQ
IEESQ
(1)
Squelched
35
Power Supply Current Including Load
Current When Squelched
30
= 3.3V
= 5V
(1)
36
I
Squelch Input Current
0
400
SQ
PSRR
Power Supply Rejection Ratio
20
30
dB
f < 2MHz, V = 100mV
IN
1. See Figure 1 for supply current measurement set up.
All AC voltage measurements are differential peak-to-peak, unless otherwise noted.
Table 2. AC Specifications
Symbol Parameter
Min
3.125
5
Typ
Max
Unit
Condition
Data Rate
Gb/s
mV
ps
V
Input Voltage Range
1200
30
IN
(1)
J
Deterministic Jitter
V
V
>10mV
D
IN
IN
45
ps
= 5mV differential, V = +3.3V.
CC
(2)
J
Random Jitter
8
ps
RMS, V > 10mV.
IN
R
10
80
ps
V
= 5mV differential, V = +3.3V.
IN CC
τ
τ
Rise and Fall Times
110
ps
20% to 80%, V >10mV.
IN
Ρ,
Φ
130
100
100
210
ps
20% to 80%, V = 5mV differential.
IN
V
Input Referred Noise
µV
Ω
RMS, IN+ to IN–
IN+ to IN–
N
R
Differential Input Resistance
Low Frequency Cutoff
DIFF
f
kHz
kHz
mV
mV
C open
Z
L
10
C = 0.1µF
Z
V
V
Output Signal When Squelched
CML Output Voltage
20
Output AC-coupled
SQ
(3)
550
700
1200
LEVEL = open, R = 50Ω .
L
CML
V
>10mV. See “Voltage Inputs
IN
vs.Voltage Output” in “Typical Operat-
ing Characteristics” on page 6.
1100
1800
20
mV
mV
mV
Ω
LEVEL = GND, R = 75Ω.
L
Squelched
560
100
V
= 5mV differential, V = +3.3V.
IN CC
Z
Output Resistance
Single-ended
O
1. Deterministic jitter measured peak-to-peak with K28.5 pattern.
2. Random jitter measured with minimum input.
3. Connect LEVEL to GND for higher output voltage.
2 of 14
G52358, Rev 4.0
2/10/03
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
