CY28419
AC Electrical Specifications (continued)
Parameter
Description
Conditions
Min.
Max.
Unit
CPU at 0.7V
TDC
CPUT and CPUC Duty Cycle
Measured at crossing point VOX
45
9.9970
7.4978
5.9982
4.9985
–
55
10.003
7.5023
6.0018
5.0015
100
ꢀ
ns
ns
ns
ns
ps
ps
ps
ꢀ
TPERIOD
TPERIOD
TPERIOD
TPERIOD
TSKEW
TCCJ
100-MHz CPUT and CPUC Period Measured at crossing point VOX
133-MHz CPUT and CPUC Period Measured at crossing point VOX
166-MHz CPUT and CPUC Period Measured at crossing point VOX
200-MHz CPUT and CPUC Period Measured at crossing point VOX
Any CPU to CPU Clock Skew
CPU Cycle-to-Cycle Jitter
Measured at crossing point VOX
Measured at crossing point VOX
–
125
TR/TF
TRFM
CPUT/CPUC Rise and Fall Times Measured from VOL = 0.175 to VOH = 0.525V
175
–
700
Rise/Fall Matching
Rise Time Variation
Fall Time Variation
Voltage High
Determined as a fraction of 2*(TR–TF)/ (TR+TF)
20
'TR
–
125
ps
ps
mv
mv
'TF
–
125
VHIGH
VLOW
VOX
Math average, see Figure 7
Math average, see Figure 7
660
–150
850
Voltage Low
–
Crossing Point voltage at 0.7V
Swing
250
550
mv
VOVS
VUDS
VRB
Maximum Overshoot Voltage
Minimum Undershoot Voltage
Ring Back Voltage
–
–0.3
–
VHIGH + 0.3
V
V
V
–
See Figure 7. Measure SE
0.2
SRC
TDC
SRCT and SRCC Duty Cycle
Measured at crossing point VOX
45
9.9970
4.9985
–
55
10.003
5.0015
125
300
700
20
ꢀ
ns
TPERIOD
TPERIOD
TCCJ
100-MHz SRCT and SRCC Period Measured at crossing point VOX
200-MHz SRCT and SRCC Period Measured at crossing point VOX
ns
SRC Cycle-to-Cycle Jitter
Measured at crossing point VOX
Measured at crossing point VOX
ps
LACC
SRCT/C Long-term Accuracy
–
ppm
ps
TR / TF
TRFM
'TR
SRCT/SRCT\C Rise and Fall Times Measured from VOL = 0.175 to VOH = 0.525V
175
–
Rise/Fall Matching
Rise Time Variation
Fall Time Variation
Voltage High
Determined as a fraction of 2*(TR–TF)/ (TR+TF)
ꢀ
–
125
125
850
–
ps
'TF
–
ps
VHIGH
VLOW
VOX
Math average, see Figure 7
Math average, see Figure 7
660
–150
mv
mv
Voltage Low
Crossing Point Voltage at 0.7V
Swing
250
550
mV
VOVS
VUDS
VRB
Maximum Overshoot Voltage
Minimum Undershoot Voltage
Ring Back Voltage
–
–0.3
–
VHIGH+0.3
V
V
V
–
See Figure 7. Measure SE
0.2
3V66
TDC
3V66 Duty Cycle
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measurement at 2.0V
Measurement at 0.8V
Measured between 0.8V and 2.0V
45
55
ꢀ
ns
ns
ns
ns
ns
ps
ps
TPERIOD
TPERIOD
THIGH
Spread Disabled 3V66 Period
Spread Enabled 3V66 Period
3V66 High Time
14.9955 15.0045
14.9955 15.0799
4.9500
–
TLOW
3V66 Low Time
4.5500
–
TR / TF
TSKEW
TCCJ
3V66 Rise and Fall Times
0.5
–
2.0
250
250
Any 3V66 to Any 3V66 Clock Skew Measurement at 1.5V
3V66 Cycle-to-Cycle Jitter Measurement at 1.5V
–
Rev 1.0,November 22, 2006
Page 12 of 15
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