CY28447
AC Electrical Specifications
Parameter
Crystal
TDC
Description
Condition
Min.
Max.
Unit
XIN Duty Cycle
XIN Period
Thedevice willoperatereliably withinput
dutycyclesupto30/70buttheREFclock
duty cycle will not be within specification
47.5
52.5
%
TPERIOD
When XIN is driven from an external
clock source
69.841
71.0
ns
TR / TF
XIN Rise and Fall Times
XIN Cycle to Cycle Jitter
Long-term Accuracy
Measured between 0.3VDD and 0.7VDD
As an average over 1-Ps duration
Measured at crossing point VOX
–
–
–
10.0
500
300
ns
ps
TCCJ
LACC
ppm
CPU at 0.7V
TDC
CPUT and CPUC Duty Cycle
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
45
55
%
TPERIOD
TPERIOD
TPERIOD
TPERIOD
TPERIODSS
TPERIODSS
TPERIODSS
TPERIODSS
TPERIODAbs
100-MHz CPUT and CPUC Period
133-MHz CPUT and CPUC Period
166-MHz CPUT and CPUC Period
200-MHz CPUT and CPUC Period
9.997001 10.00300 ns
7.497751 7.502251 ns
5.998201 6.001801 ns
4.998500 5.001500 ns
9.997001 10.05327 ns
7.497751 7.539950 ns
5.998201 6.031960 ns
4.998500 5.026634 ns
9.912001 10.08800 ns
100-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
133-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
166-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
200-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
100-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
TPERIODAbs
TPERIODAbs
TPERIODAbs
133-MHz CPUT and CPUC Absolute
period
7.412751 7.587251 ns
5.913201 6.086801 ns
4.913500 5.086500 ns
9.912001 10.13827 ns
7.412751 7.624950 ns
5.913201 6.116960 ns
4.913500 5.111634 ns
166-MHz CPUT and CPUC Absolute
period
200-MHz CPUT and CPUC Absolute
period
TPERIODSSAbs 100-MHz CPUT and CPUC Absolute
period, SSC
TPERIODSSAbs 133-MHz CPUT and CPUC Absolute
period, SSC
TPERIODSSAbs 166-MHz CPUT and CPUC Absolute
period, SSC
TPERIODSSAbs 200-MHz CPUT and CPUC Absolute
period, SSC
TCCJ
CPUT/C Cycle to Cycle Jitter
CPU2_ITP Cycle to Cycle Jitter
Long-term Accuracy
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
–
–
85[2]
125[2]
300
ps
ps
TCCJ2
LACC
–
ppm
ps
TSKEW
TSKEW2
TR / TF
CPU1 to CPU0 Clock Skew
CPU2_ITP to CPU0 Clock Skew
CPUT and CPUC Rise and Fall Time
–
100
–
150
ps
Measured from VOL = 0.175 to
VOH = 0.525V
175
700
ps
TRFM
Rise/Fall Matching
Determined as a fraction of
2*(TR – TF)/(TR + TF)
–
20
%
'TR
Rise Time Variation
Fall Time Variation
–
–
125
125
ps
ps
'TF
Note:
2. Measured with one REF on.
Rev 1.0,November 20, 2006
Page 16 of 21
SPECTRALINEAR [ SPECTRALINEAR INC ]
