參數(shù)資料
型號： CY28405OXCT
廠商： CYPRESS SEMICONDUCTOR CORP
元件分類： XO, clock
英文描述： CK409-Compliant Clock Synthesizer
中文描述： 200.9 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48
封裝： LEAD FREE, SSOP-48
文件頁數(shù)： 15/19頁
文件大?。?/td> 259K
代理商： CY28405OXCT
CY28405
Document #: 38-07512 Rev. *B
Page 15 of 19
AC Electrical Specifications
Parameter
Crystal
T
DC
Description
Conditions
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 150ms
47.5
52.5
%
T
PERIOD
XIN period
69.841
71.0
ns
T
R
/ T
F
XIN Rise and Fall Times
–
10.0
ns
T
CCJ
XIN Cycle to Cycle Jitter
–
500
ps
L
ACC
CPU at 0.7V
T
DC
T
PERIOD
T
PERIOD
T
PERIOD
T
SKEW
T
CCJ
T
R
/ T
F
Long-term Accuracy
300
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 CPU to CPU Clock Skew
CPU Cycle to Cycle Jitter
CPUT and CPUC Rise and Fall Times
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
9.9970
7.4978
4.9985
–
–
10.003
7.5023
5.0015
100
125
175
700
ps
T
RFM
Rise/Fall Matching
–
20
%
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
T
R
/ T
F
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
–
–
125
125
850
–
550
ps
ps
mv
mv
mv
V
V
V
Math average, see
Figure 7
Math average,see
Figure 7
660
–150
250
–
–0.3
–
V
HIGH
+0.3
–
0.2
See
Figure 7
. Measure SE
3V66 Duty Cycle
Spread Disabled 3V66 Period
Spread Enabled 3V66 Period
3V66 High Time
3V66 Low Time
3V66 Rise and Fall Times
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measurement at 2.4V
Measurement at 0.4V
Measured between 0.4V and
2.4V
Measurement at 1.5V
Measurement at 1.5V
45
55
%
ns
ns
ns
ns
14.9955
14.9955
4.9500
4.5500
15.0045
15.0799
–
–
0.5
2.0
ns
T
SKEW
T
CCJ
PCI/PCIF
T
DC
T
PERIOD
T
PERIOD
T
HIGH
Any 3V66 to Any 3V66 Clock Skew
3V66 Cycle to Cycle Jitter
–
–
250
250
ps
ps
PCIF and PCI Duty Cycle
Spread Disabled PCIF/PCI Period
Spread Enabled PCIF/PCI Period
PCIF and PCI High Time
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measurement at 2.4V
45
55
%
ns
ns
ns
29.9910
29.9910
12.0
30.0009
30.1598
–
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