CY28RS480 Datasheet, PDF (11/15 Pages) Cypress Semiconductor – Clock Generator for ATI RS480 Chipset

AC Electrical Specifications (continued)
Parameter
Description
PCI
T_DC
PCI Duty Cycle
T_PERIOD
Spread Disabled PCI Period
T_PERIODSS Spread Enabled PCI Period, SSC
T_PERIODAbs Spread Disabled PCI Period
T_PERIODSSAbs Spread Enabled PCI Period, SSC
T_HIGH
PCI high time
T_LOW
PCI low time
T_R / T_F
PCI rise and fall times
T_CCJ
PCI Cycle to Cycle Jitter
USB
T_DC
Duty Cycle
T_PERIOD
Period
T_PERIODAbs Absolute Period
T_HIGH
USB high time
T_LOW
USB low time
T_R / T_F
Rise and Fall Times
T_CCJ
Cycle to Cycle Jitter
TLTJ
Long Term Jitter
REF
T_DC
REF Duty Cycle
T_PERIOD
REF Period
T_PERIODAbs REF Absolute Period
T_R / T_F
REF Rise and Fall Times
T_CCJ
REF Cycle to Cycle Jitter
ENABLE/DISABLE and SET-UP
T_STABLE
Clock Stabilization from Power-up
T_SS
Stopclock Set-up Time
T_SH
Stopclock Hold Time
Condition
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measurement at 2.4V
Measurement at 0.4V
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 2.4V
Measurement at 0.4V
Measured between 0.8V and 2.0V
Measurement at 1.5V
Measurement at 1.5V@1 us
Measurement at 1.5V
Measurement at 1.5V
Measurement at 1.5V
Measured between 0.8V and 2.0V
Measurement at 1.5V
CY28RS480
Min.
Max. Unit
45
29.99100
29.9910
29.49100
29.49100
12.0
12.0
1.0
–
55
%
30.00900 ns
30.15980 ns
30.50900 ns
30.65980 ns
–
ns
–
ns
4.0 V/ns
500
ps
45
55
%
20.83125 20.83542 ns
20.48125 21.18542 ns
8.094 10.036 ns
7.694
9.836 ns
1.0
2.0 V/ns
–
350
ps
–
TBD ps
45
69.8203
68.82033
1.0
–
55
69.8622
70.86224
4.0
1000
%
ns
ns
V/ns
ps
–
1.8 ms
10.0
–
ns
0
–
ns
Document #: 38-07638 Rev. *C
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