
CY284108
...................... Document #: 38-07713 Rev. *B Page 12 of 16
AC Electrical Specifications
Parameter
Description
Condition
Min.
Max.
Unit
Crystal
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 specification
47.5
52.5
%
TPERIOD
XIN Period
When XIN is driven from an external
clock source
69.841
71.0
ns
TR / TF
XIN Rise and Fall Times
Measured between 0.3VDD and 0.7VDD
–10.0
ns
TCCJ
XIN Cycle to Cycle Jitter
As an average over 1-
s duration
–
500
ps
LACC
Long-term Accuracy
Over 150 ms
–
300
ppm
CPU at 0.7V
TDC
CPUT and CPUC Duty Cycle
Measured at crossing point VOX
45
55
%
TPERIOD
100-MHz CPUT and CPUC Period
Measured at crossing point VOX
9.997001
10.00300
ns
TPERIOD
133-MHz CPUT and CPUC Period
Measured at crossing point VOX
7.497751
7.502251
ns
TPERIOD
166-MHz CPUT and CPUC Period
Measured at crossing point VOX
5.998201
6.001801
ns
TPERIOD
200-MHz CPUT and CPUC Period
Measured at crossing point VOX
4.998500
5.001500
ns
TPERIOD
266-MHz CPUT and CPUC Period
Measured at crossing point VOX
3.748875
3.751125
ns
TPERIOD
333-MHz CPUT and CPUC Period
Measured at crossing point VOX
2.999100
3.000900
ns
TPERIOD
400-MHz CPUT and CPUC Period
Measured at crossing point VOX
2.499250
2.500750
ns
TSKEW
CPU0 to CPU1
Measured at crossing point VOX
–100
ps
TCCJ
CPUT/C Cycle to Cycle Jitter
Measured at crossing point VOX
–85
ps
LACC
Long Term Accuracy
Measured using frequency counter over
0.15seconds.
–
300
ppm
TR / TF
CPUT and CPUC Rise and Fall Times
Measured from VOL = 0.175 to VOH = 0.525V
175
1100
ps
TRFM
Rise/Fall Matching
Determined as a fraction of
2 * (TR – TF)/(TR + TF)
–20
%
T
R
Rise Time Variation
–
125
ps
T
F
Fall Time Variation
–
125
ps
VHIGH
Voltage High
660
850
mV
VLOW
Voltage Low
–150
–
mV
VOX
Crossing Point Voltage at 0.7V Swing
250
550
mV
VOVS
Maximum Overshoot Voltage
–
VHIGH + 0.3
V
VUDS
Minimum Undershoot Voltage
–0.3
–
V
VRB
Ring Back Voltage
–
0.2
V
SRC
TDC
SRCT and SRCC Duty Cycle
Measured at crossing point VOX
45
55
%
TPERIOD
100-MHz SRCT and SRCC Period
Measured at crossing point VOX
9.997001
10.00300
ns
TSKEW
Any SRCT/C to SRCT/C Clock Skew
Measured at crossing point VOX
–250
ps
TCCJ
SRCT/C Cycle to Cycle Jitter
Measured at crossing point VOX
–125
ps
LACC
SRCT/C Long Term Accuracy
Measured at crossing point VOX
–
300
ppm
TR / TF
SRCT and SRCC Rise and Fall Times
Measured from VOL = 0.175 to VOH = 0.525V
175
1100
ps
TRFM
Rise/Fall Matching
Determined as a fraction of
2 * (TR – TF)/(TR + TF)
–20
%
T
R
Rise TimeVariation
–
125
ps
T
F
Fall Time Variation
–
125
ps
VHIGH
Voltage High
660
850
mV