CY28443 Datasheet, PDF (18/25 Pages) Cypress Semiconductor – Clock Generator for Intel® Calistoga Chipset

PRELIMINARY
CY28443
AC Electrical Specifications
Parameter
Description
Condition
Min.
Crystal
T_DC
XIN Duty Cycle
The device will operate reliably with input 47.5
duty cycles up to 30/70 but the REF clock
duty cycle will not be within specification
T_PERIOD
XIN Period
When XIN is driven from an external
clock source
69.841
T_R / T_F
T_CCJ
L_ACC
CPU at 0.7V
XIN Rise and Fall Times
XIN Cycle to Cycle Jitter
Long-term Accuracy
Measured between 0.3V_DD and 0.7V_DD
–
As an average over 1-µs duration
–
Measured at crossing point V_OX
–
T_DC
T_PERIOD
T_PERIOD
T_PERIOD
T_PERIOD
T_PERIODSS
T_PERIODSS
T_PERIODSS
T_PERIODSS
T_PERIODAbs
CPUT and CPUC Duty Cycle
Measured at crossing point V_OX
100-MHz CPUT and CPUC Period
Measured at crossing point V_OX
133-MHz CPUT and CPUC Period
Measured at crossing point V_OX
166-MHz CPUT and CPUC Period
Measured at crossing point V_OX
200-MHz CPUT and CPUC Period
Measured at crossing point V_OX
100-MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
133-MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
166-MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
200-MHz CPUT and CPUC Period, SSC Measured at crossing point V_OX
100-MHz CPUT and CPUC Absolute Measured at crossing point V_OX
period
45
9.997001
7.497751
5.998201
4.998500
9.997001
7.497751
5.998201
4.998500
9.912001
T_PERIODAbs 133-MHz CPUT and CPUC Absolute Measured at crossing point V_OX
period
7.412751
T_PERIODAbs 166-MHz CPUT and CPUC Absolute Measured at crossing point V_OX
period
5.913201
T_PERIODAbs 200-MHz CPUT and CPUC Absolute Measured at crossing point V_OX
period
4.913500
T_PERIODSSAbs 100-MHz CPUT and CPUC Absolute Measured at crossing point V_OX
period, SSC
9.912001
T_PERIODSSAbs 133-MHz CPUT and CPUC Absolute Measured at crossing point V_OX
period, SSC
7.412751
T_PERIODSSAbs 166-MHz CPUT and CPUC Absolute Measured at crossing point V_OX
period, SSC
5.913201
T_PERIODSSAbs 200-MHz CPUT and CPUC Absolute Measured at crossing point V_OX
period, SSC
4.913500
T_CCJ
T_CCJ2
L_ACC
T_SKEW
T_SKEW2
T_R / T_F
T_RFM
∆T_R
∆T_F
V_HIGH
V_LOW
CPUT/C Cycle to Cycle Jitter
CPU2_ITP Cycle to Cycle Jitter
Long-term Accuracy
CPU1 to CPU0 Clock Skew
CPU2_ITP to CPU0 Clock Skew
CPUT and CPUC Rise and Fall Time
Rise/Fall Matching
Rise Time Variation
Fall Time Variation
Voltage High
Voltage Low
Measured at crossing point V_OX
Measured at crossing point V_OX
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 16
Math averages Figure 16
–
–
–
–
–
175
–
–
–
660
–150
Max.
52.5
71.0
10.0
500
300
55
10.00300
7.502251
6.001801
5.001500
10.05327
7.539950
6.031960
5.026634
10.08800
7.587251
6.086801
5.086500
10.13827
7.624950
6.116960
5.111634
85 ^[1]
125 ^[1]
300
100
210
700
20
125
125
850
–
Unit
%
ns
ns
ps
ppm
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ps
ps
ppm
ps
ps
ps
%
ps
ps
mV
mV
Document #: 38-07716 Rev *C
Page 18 of 25