CY28RS480
AC Electrical Specifications (continued)
Parameter
TDC
Description
Condition
Measured at 1.5V
Min.
45
0.9
–
Max.
55
Unit
%
Duty Cycle
Slew Rate
TR/TF
Measured at 20% and 60%
Measured at 1.5V
6.5
V/ns
ps
TCCJ
Cycle to Cycle jitter
450
500
TSKEW
PCI
HTT66 clock to PCI clock Skew
Measurement at 1.5V
–
ps
TDC
PCI Duty Cycle
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
45
55
%
TPERIOD
TPERIODSS
TPERIODAbs
Spread Disabled PCI Period
Spread Enabled PCI Period, SSC
Spread Disabled PCI Period
29.99100 30.00900 ns
29.9910 30.15980 ns
29.49100 30.50900 ns
29.49100 30.65980 ns
TPERIODSSAbs Spread Enabled PCI Period, SSC
THIGH
TLOW
TR / TF
TCCJ
PCI high time
12.0
12.0
1.0
–
–
–
ns
ns
PCI low time
PCI rise and fall times
PCI Cycle to Cycle Jitter
4.0
500
V/ns
ps
USB
TDC
Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
TPERIODAbs
THIGH
Period
Measurement at 1.5V
20.83125 20.83542 ns
Absolute Period
USB high time
USB low time
Rise and Fall Times
Cycle to Cycle Jitter
Long Term Jitter
Measurement at 1.5V
20.48125 21.18542
ns
ns
Measurement at 2.4V
8.094
7.694
1.0
–
10.036
9.836
2.0
TLOW
Measurement at 0.4V
ns
TR / TF
TCCJ
Measured between 0.8V and 2.0V
Measurement at 1.5V
V/ns
ps
350
TLTJ
Measurement at 1.5V@1 us
–
TBD
ps
REF
TDC
REF Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
TPERIODAbs
TR / TF
REF Period
Measurement at 1.5V
69.8203
69.8622
ns
REF Absolute Period
REF Rise and Fall Times
REF Cycle to Cycle Jitter
Measurement at 1.5V
68.82033 70.86224 ns
Measured between 0.8V and 2.0V
Measurement at 1.5V
1.0
–
4.0
V/ns
ps
TCCJ
1000
ENABLE/DISABLE and SET-UP
TSTABLE Clock Stabilization from Power-up
TSS
–
10.0
0
1.8
–
ms
ns
ns
Stopclock Set-up Time
Stopclock Hold Time
TSH
–
Rev 1.0,November 22, 2006
Page 11 of 14
SPECTRALINEAR [ SPECTRALINEAR INC ]
