CY28439-2 Datasheet, PDF (18/21 Pages) SpectraLinear Inc – Clock Generator for Intel Grantsdale Chipset

CY28439-2
AC Electrical Specifications (continued)
Parameter
T_SKEW
T_CCJ
DOT
T_DC
T_PERIOD
T_PERIODAbs
T_CCJ
L_ACC
T_LTJ
T_R / T_F
T_RFM
'T_R
'T_F
V_HIGH
V_LOW
V_OX
V_OVS
Description
Any PCI clock to Any PCI clock Skew
PCIF and PCI Cycle to Cycle Jitter
Condition
Measurement at 1.5V
Measurement at 1.5V
Min.
–
–
DOT96T and DOT96C Duty Cycle
Measured at crossing point V_OX
45
DOT96T and DOT96C Period
Measured at crossing point V_OX
10.41354
DOT96T and DOT96C Absolute Period Measured at crossing point V_OX
10.16354
DOT96T/C Cycle to Cycle Jitter
Measured at crossing point V_OX
–
DOT96T/C Long Term Accuracy
Measured at crossing point V_OX
–
Long Term jitter
Measurement taken from cross point
–
V_OX @ 1 Ps
Measurement taken from cross point
–
V_OX @ 10Ps
DOT96T and DOT96C Rise and Fall Times Measured from V_OL = 0.175 to V_OH = 0.525V 130
Rise/Fall Matching
Determined as a fraction of
–
2*(T_R – T_F)/(T_R + T_F)
Rise Time Variation
–
Fall Time Variation
–
Voltage High
Math averages Figure 10
660
Voltage Low
Math averages Figure 10
–150
Crossing Point Voltage at 0.7V Swing
250
Maximum Overshoot Voltage
–
V_UDS
Minimum Undershoot Voltage
V_RB
Ring Back Voltage
USB48, 24_48M
T_DC
USB Duty Cycle
T_PERIOD
USB Period,
See Figure 10. Measure SE
Measurement at 1.5V
Measurement at 1.5V, mean value over
1 Ps
T_PERIODabs
USB Period
Measurement at 1.5V, max. and min.
values over 1 Ps
T_PERIOD24
24M Period
Measurement at 1.5V, mean value over
1 Ps
T_PERIOD24abs 24M Period
Measurement at 1.5V, max. and min.
values over 1 Ps
L_ACC
Long Accuracy
Measured at 1.5V using frequency
counter over 0.15s
T_HIGH
T_LOW
T_HIGH24
T_LOW24
Edge rate
USB high time (High drive)
USB low time (High drive)
USB high time (High drive)
USB low time (High drive)
Rising edge rate (High drive)
Measurement at 2.0V
Measurement at 0.8V
Measurement at 2.0V
Measurement at 0.8V
Measured between 0.8V and 2.0V
Edge rate Falling edge rate (High drive)
Measured between 0.8V and 2.0V
T_CCJ
USB Cycle to Cycle Jitter (High drive) Measurement taken@1.5V waveform
24_48M Cycle to Cycle Jitter (High drive) Measurement taken@1.5V waveform
T_LTJ
Long Term jitter
Measurement taken from cross point
V_OX @ 1 Ps
–0.3
–
45
20.83125
20.48125
41.67083
41.57083
–
8.094
7.694
16.188
15.388
1.0
1.0
–
–
–
Max. Unit
500
ps
500
ps
55
%
10.41979 ns
10.66979 ns
250
ps
100 ppm
700
ps
700
ps
700
ps
20
%
125
ps
125
ps
850 mV
–
mV
550 mV
V_HIGH + V
0.3
–
V
0.2
V
55
%
20.83542 ns
21.18542 ns
41.66250 ns
41.76250 ns
100 ppm
10.9 ns
11.5 ns
22.7 ns
22.6 ns
3.0 V/ns
3.0 V/ns
300
ps
350
ps
700
ps
Rev 1.0, November 21, 2006
Page 18 of 21