VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
1Gb/s 16-Channel
Drive-Side Deskew IC
VSC6250
AC Timing Characteristics
Table 2: AC Timing Characteristics
Parameter
Description
Min
Typ
Max
Units
tPDR(MIN), PDF(MIN)
t
Propagation Delay, Minimum Delay
Propagation Delay, Maximum Delay
Propagation Delay, Span
4.1
9.9
5.8
—
5
11.6
—
8
6.5
13.5
7
ns
ns
tPDR(MAX), tPDF(MAX)
tPD(SPAN)
tRES
ns
Delay Element Resolution
Delay Differential Nonlinearity
Input Pulse Width
20
ps
DNL
-2
—
—
—
250
—
2
+2
—
LSB
ns
tPWI
0.75
0.5
tPWO
Output Pulse Width
—
ns
FRCK
DTDD
DTDT
PSRR
Reference Clock Frequency
Variation in Delay vs. Duty Cycle
Variation in Delay vs Temperature
Power Supply Rejection Ratio(1)
Output Rise Fall Times (20% to 80%)
Adjacent Edge Spacing
—
MHz
ps
-50
—
—
—
2
+50
—
ps/C°
ps/100mV
ps
—
300
—
3
230
—
tR/tF
tREFIRE
JO
—
ns
Output Jitter
—
—
ps rms
NOTE: (1) Change in range of maximum delay.
.
Figure 7: AC Timing Diagram
DINx
tPDF(MAX)
tPDF(MIN)
tPDR(MAX)
tPDR(MIN)
DOUTx
tPDR(SPAN)
tPDF(SPAN)
tPWO
G52197-0, Rev. 4.0
8/19/00
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 7
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