VITESSE
SEMICONDUCTOR CORPORATION
1.6 Gb/s 16 x 32
Crosspoint Switch
Data Sheet
VSC850
Figure 2: Normal Data Flow Timing
Minimum Input Pulse Width & Propagation Delay
T
PW
AC Timing Waveforms
I+ [0:15]
I-[0:15]
Z+ [0:31]
Z-[0:31]
T
DLY
T
DLY
T
SKEW
T
SKEW
Table 3: Configuration, Broadcast, FlowThru Mode
.
Parameters
T
LSW
T
GSW
T
GSZ
T
LSZ
T
ALSSU
T
ALSH
T
DLSSU
T
DLSH
T
GLSU
T
GLH
T
CLSSU
T
CLSH
T
BLSSU
T
BLSH
T
FLSSU
T
FLSH
Description
LSTROBE[0:1] pulse width
GSTROBE pulse width
GSTROBE to Z+/Z- Outputs Delay
LSTROBE[0:1] to Z+/Z- Outputs Delay
A[0:7] to LSTROBE setup time
A[0:7] to LSTROBE hold time
D[0:7] to LSTROBE setup time
D[0:7] to LSTROBE hold time
GSTROBE to LSTROBE setup time
GSTROBE to LSTROBE hold time
CONFMODE to LSTROBE setup time
CONFMODE to LSTROBE hold time
BROADCAST to LSTROBE setup time
BROADCAST to LSTROBE hold time
FLOWTHRU to LSTROBE setup time
FLOWTHRU to LSTROBE hold time
Min
5
5
1.5
2
3
1
3
1
2
2
3.5
1
3.5
1
3.5
1
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Max
—
—
5000
6000
—
—
—
—
—
—
—
—
—
—
—
—
Units
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
—
—
—
Conditions
GSTROBE high
—
—
—
—
—
—
—
—
—
—
—
—
Page 6
©
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
G52152-0 Rev. 4.0
6/4/99
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
