CY28RS400
AC Electrical Specifications (continued)
Parameter
Description
Condition
Min.
Max.
Unit
TPERIODSS
100-MHz SRCT and SRCC Period, SSC
Measured at crossing point VOX
Measured at crossing point VOX
9.997001 10.05327 ns
10.12800 9.872001 ns
TPERIODAbs 100-MHz SRCT and SRCC Absolute Period
TPERI-
100-MHz SRCT and SRCC Absolute Period, SSC Measured at crossing point VOX
9.872001 10.17827 ns
ODSSAbs
TSKEW
Any SRCT/C to SRCT/C Clock Skew
Any SRCS clock to Any SRCS clock Skew
SRCT/C Cycle to Cycle Jitter
Measured at crossing point VOX
Measured at crossing point Vox
Measured at crossing point VOX
Measured at crossing point VOX
Measured from VOL = 0.175 to
–
-
250
250
125
300
ps
ps
TSKEW
TCCJ
–
–
ps
LACC
SRCT/C Long Term Accuracy
ppm
TR / TF
SRCT and SRCC Rise and Fall Times
175
–
700
20
ps
%
VOH = 0.525V
TRFM
Rise/Fall Matching
Determined as a fraction of
2*(TR – TF)/(TR + TF)
'TR
Rise TimeVariation
–
–
125
125
850
–
ps
ps
'TF
Fall Time Variation
VHIGH
VLOW
VOX
Voltage High
Math averages Figure 13
Math averages Figure 13
660
–150
250
mv
mv
mV
Voltage Low
Crossing Point Voltage at 0.7V Swing
Maximum Overshoot Voltage
550
VOVS
VHIGH
0.3
+
–
V
VUDS
Minimum Undershoot Voltage
Ring Back Voltage
–0.3
–
–
V
V
VRB
See Figure 13. Measure SE
0.2
PCI
TDC
PCI Duty Cycle
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
45
55
%
TPERIOD
TPERIODSS
Spread Disabled PCI Period
Spread Enabled PCI Period, SSC
29.99100 30.00900 ns
29.9910 30.15980 ns
29.49100 30.50900 ns
TPERIODAbs Spread Disabled PCI Period
TPERI-
ODSSAbs
THIGH
Spread Enabled PCI Period, SSC
29.49100 30.65980 ns
PCI high time
Measurement at 2.4V
12.0
12.0
–
–
ns
ns
TLOW
PCI low time
Measurement at 0.4V
TR / TF
PCI rise and fall times
Measured between 0.8V and 2.0V
V/n
s
1.0
–
4.0
TCCJ
PCI Cycle to Cycle Jitter
Measurement at 1.5V
500
ps
USB
TDC
Duty Cycle
Period
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measurement at 2.4V
Measurement at 0.4V
Measured between 0.8V and 2.0V
45
55
%
TPERIOD
20.83125 20.83542 ns
20.48125 21.18542 ns
TPERIODAbs Absolute Period
THIGH
TLOW
USB high time
8.094
7.694
10.036
9.836
ns
ns
USB low time
TR / TF
Rise and Fall Times
V/n
s
1.0
–
2.0
TCCJ
Cycle to Cycle Jitter
Measurement at 1.5V
350
ps
REF
TDC
REF Duty Cycle
REF Period
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
45
55
%
TPERIOD
69.8203 69.8622 ns
68.82033 70.86224 ns
TPERIODAbs REF Absolute Period
Rev 1.0,November 22, 2006
Page 15 of 18
SPECTRALINEAR [ SPECTRALINEAR INC ]
