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CY28409 Datasheet(PDF) 15 Page - Cypress Semiconductor

Part No. CY28409
Description  Clock Synthesizer with Differential SRC and CPU Outputs
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Maker  CYPRESS [Cypress Semiconductor]
Homepage  http://www.cypress.com
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CY28409 Datasheet(HTML) 15 Page - Cypress Semiconductor

 
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CY28409
Document #: 38-07445 Rev. *B
Page 15 of 18
TR / TF
3V66 Rise and Fall Times
Measured between 0.8V and 2.0V
0.5
2.0
ns
TSKEW
Any 3V66 to Any 3V66 Clock Skew
Measurement at 1.5V
250
ps
TCCJ
3V66 Cycle to Cycle Jitter
Measurement at 1.5V
250
ps
PCI/PCIF
TDC
PCI Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
Spread Disabled PCIF/PCI Period
Measurement at 1.5V
29.9910
30.0009
ns
TPERIOD
Spread Enabled PCIF/PCI Period
Measurement at 1.5V
29.9910
30.1598
ns
THIGH
PCIF and PCI high time
Measurement at 2.0V
12.0
ns
TLOW
PCIF and PCI low time
Measurement at 0.8V
12.0
ns
TR / TF
PCIF and PCI rise and fall times
Measured between 0.8V and 2.0V
0.5
2.0
ns
TSKEW
Any PCI clock to Any PCI clock Skew
Measurement at 1.5V
500
ps
TCCJ
PCIF and PCI Cycle to Cycle Jitter
Measurement at 1.5V
250
ps
DOT
TDC
Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
Period
Measurement at 1.5V
20.8271
20.8396
ns
TSKEW
Any 48-MHz to 48-MHz Clock Skew
Measured at crossing point VOX
500
ps
THIGH
USB high time
Measurement at 2.0V
8.994
10.486
ns
TLOW
USB low time
Measurement at 0.8V
8.794
10.386
ns
TR / TF
Rise and Fall Times
Measured between 0.8V and 2.0V
0.5
1.0
ns
TCCJ
Cycle to Cycle Jitter
Measurement at 1.5V
350
ps
USB
TDC
Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
Period
Measurement at 1.5V
20.8271
20.8396
ns
TSKEW
Any 48-MHz to 48-MHz Clock Skew
Measured at crossing point VOX
500
ps
THIGH
USB high time
Measurement at 2.0V
8.094
10.036
ns
TLOW
USB low time
Measurement at 0.8V
7.694
9.836
ns
TR / TF
Rise and Fall Times
Measured between 0.8V and 2.0V
1.0
2.0
ns
TCCJ
Cycle to Cycle Jitter
Measurement at 1.5V
350
ps
REF
TDC
REF Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
REF Period
Measurement at 1.5V
69.827
69.855
ns
TSKEW
Any REF to REF Clock Skew
Measured at crossing point VOX
500
ps
TR / TF
REF Rise and Fall Times
Measured between 0.8V and 2.0V
0.5
2.0
ns
TCCJ
REF Cycle to Cycle Jitter
Measurement at 1.5V
1000
ps
ENABLE/DISABLE and SET-UP
TSTABLE
Clock Stabilization from Power-up
1.8
ms
TSS
Stopclock Set-up Time
10.0
ns
TSH
Stopclock Hold Time
0
ns
AC Electrical Specifications (continued)
Parameter
Description
Condition
Min.
Max.
Unit
Table 7. Group Timing Relationship and Tolerances
Group
Conditions
Offset
Min.
Max.
3V66 to PCI
3V66 Leads PCI
1.5 ns
3.5 ns
Table 8. USB to DOT Phase Offset
Parameter
Typical
Value
Tolerance
DOT Skew
0.0 ns
1000 ps
USB Skew
180°
0.0 ns
1000 ps
VCH SKew
0.0 ns
1000 ps


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