VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
VSC850
1.6 Gb/s 16X32
Crosspoint Switch
DC Characteristics
(Over recommended operating conditions. ECLOutput load 50
Ω
to V
TT.
)
Parameters
V
ODIF
V
OCM
V
IDIF
V
ICM
I
IHE
I
ILE
V
IHT
V
ILT
I
IHT
I
ILT
I
VTTL
I
VTT
P
D
Description
Differential ECL Output Voltage
Common Mode ECL Output Voltage
Differential ECL Input Voltage
Common Mode ECL Input Voltage
Input HIGH ECL Current
Input LOW ECL Current
Input HIGH voltage (TTL)
Input LOW voltage (TTL)
Input HIGH current (TTL)
Input LOW current (TTL)
VTTL Supply Current
VTT Supply Current
Power dissipation
Min
600
-1.5
200
-1.5
—
-50
2.0
0
—
-500
—
—
—
Typ
—
—
—
—
—
—
—
—
50
—
—
—
—
Max
1100
-1.0
1200
-0.5
+200
—
4.3
0.8
—
—
20
2850
5800
Units
mV
V
mV
V
µA
µA
V
V
µA
µA
mA
mA
mW
Conditions
50Ω to V
TT
50Ω to V
TT
V
IN =
-0.7V
V
IN =
-2.0V
2.0V < V
IN
< 4.3V
-0.5V < V
IN
< 0.8V
Outputs open
AC Characteristics
(Over recommended operating conditions. ECL Output load 50
Ω
to V
TT.
)
Table 2: Data Flow Mode
.
Parameters
T
PW
T
DLY
Tduty
Tskew
Tpskew
Description
Minimum input pulse width
Propagation delay
Duty cycle distortion
Output to output skew
Data path skew
Min
640
540
—
—
—
Typ
—
—
—
—
—
Max
—
1800
100
200
500
Units
pS
pS
pS
pS
pS
—
Conditions
Worst case 60/40 input duty cycle
at 1.6 Gb/s Note(1)
On a given part broadcast mode
For any 2 paths from I+/I- to Z+/Z- on
a given part
(1) Duty cycle distortion = duty cycle out - duty cycle in (pS) . With 8B/10B encoded data.
G52152-0 Rev. 4.0
6/4/99
©
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 5
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