CY28405-3
AC Electrical Specifications
Parameter
Crystal
Description
Condition
Min.
Max.
Unit
TDC
XIN Duty Cycle
The device will operate reliably
with input duty cycles up to
30/70 but the REF clock duty
cycle will not be within specifi-
cation
47.5
52.5
ꢀ
TPERIOD
TR / TF
TCCJ
XIN period
When Xin is driven from an
external clock source
69.841
71.0
10.0
500
300
ns
ns
XIN Rise and Fall Times
XIN Cycle to Cycle Jitter
Long-term Accuracy
Measured between 0.3VDD and
0.7VDD
–
–
As an average over 1-Ps
duration
ps
LACC
Over 150 ms
ppm
CPU at 0.7V
TDC
CPUT and CPUC Duty Cycle
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
45
9.9970
7.4978
4.9985
–
55
ꢀ
ns
ns
ns
ps
ps
ps
TPERIOD
TPERIOD
TPERIOD
TSKEW
TCCJ
100-MHz CPUT and CPUC Period
133-MHz CPUT and CPUC Period
200-MHz CPUT and CPUC Period
Any CPUT/C to CPUT/C Clock Skew
CPUT/C Cycle to Cycle Jitter
10.003
7.5023
5.0015
100
–
125
TR / TF
CPUT and CPUC Rise and Fall Times Measured from Vol = 0.175 to
Voh = 0.525V
175
700
TRFM
Rise/Fall Matching
Determined as a fraction of
2*(TR-TF)/(TR+TF)
–
20
ꢀ
'TR
Rise Time Variation
–
–
125
ps
ps
mV
mV
mV
V
'TF
Fall Time Variation
125
VHIGH
VLOW
VOX
Voltage High
Math averages Figure 7
Math averages Figure 7
660
–150
250
–
850
Voltage Low
–
Crossing Point Voltage at 0.7V Swing
Maximum Overshoot Voltage
Minimum Undershoot Voltage
Ring Back Voltage
550
VOVS
VUDS
VRB
VHIGH + 0.3
–0.3
–
–
V
See Figure 7. Measure SE
0.2
V
SRC
TDC
SRCT and SRCC Duty Cycle
100 MHz SRCT and SRCC Period
200 MHz SRCT and SRCC Period
Long Term Accuracy
Measured at crossing point VOX
45
55
10.003
5.0015
300
ꢀ
ns
TPERIOD
TPERIOD
LACC
Measured at crossing point VOX 9.9970
Measured at crossing point VOX 4.9985
ns
Measured at crossing point VOX
Measured at crossing point VOX
–
–
ppm
ps
TCCJ
SRCT/C Cycle to Cycle Jitter
125
TR / TF
SRCT and SRCC Rise and Fall Times Measured from Vol= 0.175 to
Voh = 0.525V
175
700
ps
TRFM
Rise/Fall Matching
Determined as a fraction of
2*(TR-TF)/(TR+TF)
–
20
ꢀ
'TR
Rise Time Variation
Fall Time Variation
Voltage High
–
–
125
125
850
–
ps
ps
'TF
VHIGH
VLOW
VOX
Math averages Figure 7
Math averages Figure 7
660
–150
250
mv
mv
mV
Voltage Low
Crossing Point Voltage at 0.7V Swing
550
Rev 1.0,November 22, 2006
Page 12 of 16
SPECTRALINEAR [ SPECTRALINEAR INC ]
