VITESSE
SEMICONDUCTOR CORPORATION
Datasheet
VSC834
2.5Gb/s 17x17 Crosspoint Switch
with Input Signal Activity (ISA) Monitoring
AC Characteristics
Table 3: Data Path
Parameter
Description
FRATE
TISKW
TOSKW
tR, tF
tR, tF
tjP
Data rate
Input channel delay skew (1)
Output channel delay skew (2)
High-speed input rise/fall times, 20% to 80% (3)
High-speed output rise/fall times, 20% to 80%
Output data eye jitter, peak-peak, 223 PRBS (4)
Min
Typ
Max
Units
-
-
2.5
Gb/s
-
300
-
ps
-
300
-
ps
-
-
150
ps
-
-
150
ps
-
-
100
ps
Note: Unless otherwise stated, all specifications are guaranteed but not tested.
Note 1: Skew between any two input channels to a given output.
Note 2: Skew between any two output channels from the same input channel.
Note 3: Required for high-speed output rise/fall spec at FRATE=2.5 Gbits/s. For lower rate signals, use 0.375/FRATE
Note 4: Broadband jitter added to a jitter-free signal; jitter is primarily in the form of ISI for random data
Figure 2: Interrupt Timing (Change in Monitor State Registers)
MONCLK
Monitor State
Monitor State Reg
INTB
CSB
RDB
ADDR[5:0]
DATA[4:0]
TsRDB
ThRDB
TtsDATA
Figure 3: Interrupt Timing (No Change in Monitor State Registers)
MONCLK
Monitor State
Monitor State Reg
INTB
G52247-0, Rev 4.2
02/09/01
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