參數(shù)資料
型號(hào)： CY28409
廠商： Cypress Semiconductor Corp.
英文描述： Clock Synthesizer with Differential SRC and CPU Outputs
中文描述： 時(shí)鐘合成器與微分SRC以及CPU的輸出
文件頁(yè)數(shù)： 14/18頁(yè)
文件大?。?/td> 330K
代理商： CY28409
CY28409
Document #: 38-07445 Rev. *B
Page 14 of 18
AC Electrical Specifications
Parameter
Crystal
T
DC
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
When XIN is driven from an external clock
source
Measured between 0.3V
DD
and 0.7V
DD
As an average over 1-
μ
s duration
Over 150 ms
47.5
52.5
%
T
PERIOD
XIN Period
69.841
71.0
ns
T
R
/ T
F
T
CCJ
L
ACC
CPU at 0.7V
T
DC
T
PERIOD
T
PERIOD
T
PERIOD
T
SKEW
T
CCJ
T
R
/ T
F
T
RFM
T
R
T
F
V
HIGH
V
LOW
V
OX
V
OVS
V
UDS
V
RB
SRC
T
DC
T
PERIOD
T
PERIOD
T
CCJ
L
ACC
T
R
/ T
F
T
RFM
T
R
T
F
V
HIGH
V
LOW
V
OX
V
OVS
V
UDS
V
RB
3V66
T
DC
T
PERIOD
T
PERIOD
T
HIGH
T
LOW
XIN Rise and Fall Times
XIN Cycle to Cycle Jitter
Long-term Accuracy
–
–
10.0
500
300
ns
ps
ppm
CPUT and CPUC Duty Cycle
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
CPUT and CPUC Rise and Fall Times
Rise/Fall Matching
Rise Time Variation
Fall Time Variation
Voltage High
Voltage Low
Crossing Point Voltage at 0.7V Swing
Maximum Overshoot Voltage
Minimum Undershoot Voltage
Ring Back Voltage
Measured at crossing point V
OX
Measured at crossing point V
OX
Measured at crossing point V
OX
Measured at crossing point V
OX
Measured at crossing point V
OX
Measured at crossing point V
OX
Measured from V
OL
= 0.175 to V
OH
= 0.525V
Determined as a fraction of 2*(T
R
– T
F
)/(T
R
+ T
F
)
45
55
%
ns
ns
ns
ps
ps
ps
%
ps
ps
mv
mv
mv
V
V
V
9.9970
7.4978
4.9985
–
–
175
–
–
–
660
–150
250
–
–0.3
–
10.003
7.5023
5.0015
100
125
700
20
125
125
850
–
550
V
HIGH
+ 0.3
–
0.2
Math averages
Figure 11
Math averages
Figure 11
See
Figure 11
. Measure SE
SRCT and SRCC Duty Cycle
100 MHz SRCT and SRCC Period
200 MHz SRCT and SRCC Period
SRCT/C Cycle to Cycle Jitter
SRCT/C Long Term Accuracy
SRCT and SRCC Rise and Fall Times
Rise/Fall Matching
Rise Time Variation
Fall Time Variation
Voltage High
Voltage Low
Crossing Point Voltage at 0.7V Swing
Maximum Overshoot Voltage
Minimum Undershoot Voltage
Ring Back Voltage
Measured at crossing point V
OX
Measured at crossing point V
OX
Measured at crossing point V
OX
Measured at crossing point V
OX
Measured at crossing point V
OX
Measured from V
OL
= 0.175 to V
OH
= 0.525V
Determined as a fraction of 2*(T
R
– T
F
)/(T
R
+ T
F
)
45
55
%
ns
ns
ps
ppm
ps
%
ps
ps
mv
mv
mV
V
V
V
9.9970
4.9985
–
–
175
–
–
–
660
–150
250
–
–0.3
–
10.003
5.0015
125
300
700
20
125
125
850
–
550
V
HIGH
+ 0.3
–
0.2
Math averages
Figure 11
Math averages
Figure 11
See
Figure 11.
Measure SE
3V66 Duty Cycle
Spread Disabled 3V66 Period
Spread Enabled 3V66 Period
3V66 High Time
3V66 Low Time
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measurement at 2.0V
Measurement at 0.8V
45
55
%
ns
ns
ns
ns
14.9955
14.9955
4.9500
4.5500
15.0045
15.0799
–
–
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