CY28409 Cypress Semiconductor, CY28409 Datasheet - Page 15

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

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