CY28412
AC Electrical Specifications
Parameter
Crystal
TDC
Description
Condition
Min.
Max.
Unit
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 specification
47.5
52.5
71.0
%
TPERIOD
XIN Period
When XIN is driven from an external clock
source
69.841
ns
TR / TF
TCCJ
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
Over 150 ms
–
–
–
10.0
500
300
ns
ps
LACC
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
Measured at crossing point VOX
Measured at crossing point VOX
45
55
%
ns
ns
ns
ns
ns
ns
ns
TPERIOD
TPERIOD
TPERIOD
TPERIOD
TPERIOD
TPERIOD
TPERIOD
100 MHz CPUT and CPUC Period
133 MHz CPUT and CPUC Period
166 MHz CPUT and CPUC Period
200 MHz CPUT and CPUC Period
266 MHz CPUT and CPUC Period
333 MHz CPUT and CPUC Period
400 MHz CPUT and CPUC Period
9.9970
7.4978
5.9982
4.9985
3.7489
2.9991
2.4993
10.003
7.5023
6.0018
5.0015
3.7511
3.0009
2.5008
TPERIODSS 100 MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
TPERIODSS 133 MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
TPERIODSS 166 MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
TPERIODSS 200 MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
TPERIODSS 266 MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
TPERIODSS 333 MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
TPERIODSS 400 MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
9.9970 10.0533 ns
7.4978
5.9982
4.9985
3.7489
2.9991
2.4993
7.5400
6.0320
5.0266
3.7700
3.0160
2.5133
ns
ns
ns
ns
ns
ns
TSKEW
Any CPUT/C to CPUT/C Clock Skew, Measured at crossing point VOX
SSC
–
100
ps
TCCJ
CPUT/C Cycle to Cycle Jitter
CPU2_ITP Cycle to Cycle Jitter
CPU2_ITP to CPU0 Clock Skew
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
–
–
85
125
150
700
20
ps
ps
ps
ps
%
TCCJ2
TSKEW2
TR / TF
TRFM
'TR
–
CPUT and CPUC Rise and Fall Times Measured from VOL = 0.175 to VOH = 0.525V
175
–
Rise/Fall Matching
Determined as a fraction of 2*(TR – TF)/(TR + TF)
Rise Time Variation
Fall Time Variation
–
125
125
850
–
ps
ps
mv
mv
mv
'TF
–
VHIGH
VLOW
VOX
Voltage High
Math averages Figure 8
Math averages Figure 8
660
–150
250
Voltage Low
Crossing Point Voltage at 0.7V Swing
Maximum Overshoot Voltage
550
VOVS
VHIGH
0.3
+
–
V
VUDS
VRB
Minimum Undershoot Voltage
Ring Back Voltage
–0.3
–
–
V
V
See Figure 8. Measure SE
0.2
SRC
TDC
SRCT and SRCC Duty Cycle
Measured at crossing point VOX
Measured at crossing point VOX
45
55
%
TPERIOD
100 MHz SRCT and SRCC Period
9.9970
10.003
ns
TPERIODSS 100 MHz SRCT and SRCC Period, SSC Measured at crossing point VOX
9.9970 10.0533 ns
Rev 1.0,November 20, 2006
Page 12 of 16
SPECTRALINEAR [ SPECTRALINEAR INC ]
