CY28412 Datasheet, PDF (12/16 Pages) SpectraLinear Inc – Clock Generator for Intel® Grantsdale Chipset

CY28412
AC Electrical Specifications
Parameter
Description
Condition
Min.
Crystal
T_DC
XIN Duty Cycle
The device will operate reliably with input duty
cycles up to 30/70 but the REF clock duty cycle 47.5
will not be within specification
T_PERIOD XIN Period
When XIN is driven from an external clock
source
69.841
T_R / T_F XIN Rise and Fall Times
T_CCJ
XIN Cycle to Cycle Jitter
L_ACC
Long-term Accuracy
CPU at 0.7V
Measured between 0.3V_DD and 0.7V_DD
–
As an average over 1-Ps duration
–
Over 150 ms
–
T_DC
CPUT and CPUC Duty Cycle
Measured at crossing point V_OX
T_PERIOD 100 MHz CPUT and CPUC Period
Measured at crossing point V_OX
T_PERIOD 133 MHz CPUT and CPUC Period
Measured at crossing point V_OX
T_PERIOD 166 MHz CPUT and CPUC Period
Measured at crossing point V_OX
T_PERIOD 200 MHz CPUT and CPUC Period
Measured at crossing point V_OX
T_PERIOD 266 MHz CPUT and CPUC Period
Measured at crossing point V_OX
T_PERIOD 333 MHz CPUT and CPUC Period
Measured at crossing point V_OX
T_PERIOD 400 MHz CPUT and CPUC Period
Measured at crossing point V_OX
T_PERIODSS 100 MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
T_PERIODSS 133 MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
T_PERIODSS 166 MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
T_PERIODSS 200 MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
T_PERIODSS 266 MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
T_PERIODSS 333 MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
T_PERIODSS 400 MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
T_SKEW
Any CPUT/C to CPUT/C Clock Skew, Measured at crossing point V_OX
SSC
45
9.9970
7.4978
5.9982
4.9985
3.7489
2.9991
2.4993
9.9970
7.4978
5.9982
4.9985
3.7489
2.9991
2.4993
–
T_CCJ
T_CCJ2
T_SKEW2
T_R / T_F
T_RFM
'T_R
'T_F
V_HIGH
V_LOW
V_OX
V_OVS
CPUT/C Cycle to Cycle Jitter
CPU2_ITP Cycle to Cycle Jitter
CPU2_ITP to CPU0 Clock Skew
CPUT and CPUC Rise and Fall Times
Rise/Fall Matching
Rise Time Variation
Fall Time Variation
Voltage High
Voltage Low
Crossing Point Voltage at 0.7V Swing
Maximum Overshoot Voltage
Measured at crossing point V_OX
Measured at crossing point V_OX
Measured at crossing point V_OX
Measured from V_OL = 0.175 to V_OH = 0.525V
Determined as a fraction of 2*(T_R – T_F)/(T_R + T_F)
Math averages Figure 8
Math averages Figure 8
–
–
–
175
–
–
–
660
–150
250
–
V_UDS
V_RB
SRC
Minimum Undershoot Voltage
Ring Back Voltage
See Figure 8. Measure SE
T_DC
SRCT and SRCC Duty Cycle
Measured at crossing point V_OX
T_PERIOD 100 MHz SRCT and SRCC Period
Measured at crossing point V_OX
T_PERIODSS 100 MHz SRCT and SRCC Period, SSC Measured at crossing point V_OX
–0.3
–
45
9.9970
9.9970
Max. Unit
52.5 %
71.0 ns
10.0 ns
500 ps
300 ppm
55
%
10.003 ns
7.5023 ns
6.0018 ns
5.0015 ns
3.7511 ns
3.0009 ns
2.5008 ns
10.0533 ns
7.5400 ns
6.0320 ns
5.0266 ns
3.7700 ns
3.0160 ns
2.5133 ns
100 ps
85
ps
125 ps
150 ps
700 ps
20
%
125 ps
125 ps
850 mv
–
mv
550 mv
V_HIGH +
0.3
V
–
V
0.2
V
55
%
10.003 ns
10.0533 ns
Rev 1.0, November 20, 2006
Page 12 of 16