CY28409 Cypress Semiconductor, CY28409 Datasheet - Page 14

• Manufacturer Part Number: CY28409
• Description: Clock Synthesizer with Differential SRC and CPU Outputs
• Manufacturer: Cypress Semiconductor

Document #: 38-07445 Rev. *B
AC Electrical Specifications
Parameter
Crystal
T
T
T
T
L
CPU at 0.7V
T
T
T
T
T
T
T
T
V
V
V
V
V
V
SRC
T
T
T
T
L
T
T
V
V
V
V
V
V
3V66
T
T
T
T
T
ACC
ACC
DC
PERIOD
R
CCJ
DC
PERIOD
PERIOD
PERIOD
SKEW
CCJ
R
RFM
T
T
HIGH
LOW
OX
OVS
UDS
RB
DC
PERIOD
PERIOD
CCJ
R
RFM
T
T
HIGH
LOW
OX
OVS
UDS
RB
DC
PERIOD
PERIOD
HIGH
LOW
R
F
R
F
/ T
/ T
/ T
F
F
F
XIN Duty Cycle
XIN Period
XIN Rise and Fall Times
XIN Cycle to Cycle Jitter
Long-term Accuracy
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
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
3V66 Duty Cycle
Spread Disabled 3V66 Period
Spread Enabled 3V66 Period
3V66 High Time
3V66 Low Time
Description
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
Over 150 ms
Measured at crossing point V
Measured at crossing point V
Measured from V
Determined as a fraction of 2*(T
Math averages Figure 11
Math averages Figure 11
See Figure 11. Measure SE
Measured at crossing point V
Measured from V
Determined as a fraction of 2*(T
Math averages Figure 11
Math averages Figure 11
See Figure 11. Measure SE
Measurement at 1.5V
Measurement at 2.0V
Measurement at 0.8V
The device will operate reliably with input duty
As an average over 1- s duration
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measurement at 1.5V
Measurement at 1.5V
OL
OL
Condition
= 0.175 to V
= 0.175 to V
DD
and 0.7V
OX
OX
OX
OX
OX
OX
OX
OX
OX
OX
OX
R
R
– T
– T
OH
OH
F
F
)/(T
)/(T
= 0.525V
= 0.525V
DD
R
R
+ T
+ T
F
F
)
)
14.9955
14.9955
69.841
9.9970
7.4978
4.9985
9.9970
4.9985
4.9500
4.5500
–150
–150
Min.
47.5
–0.3
–0.3
660
660
175
250
175
250
45
45
45
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
V
V
CY28409
15.0045
15.0799
HIGH
HIGH
10.003
7.5023
5.0015
10.003
5.0015
Page 14 of 18
Max.
52.5
71.0
10.0
500
300
100
125
700
125
125
850
550
125
300
700
125
125
850
550
0.2
0.2
55
20
55
20
55
–
–
–
–
–
–
+ 0.3
+ 0.3
ppm
ppm
Unit
mV
mv
mv
mv
mv
mv
ns
ns
ns
ns
ns
ps
ps
ps
ps
ns
ns
ps
ps
ps
ns
ps
ps
ps
ns
ns
ns
%
%
%
%
%
%
V
V
V
V
V
V