CY28551-3
....................Document #: 001-05677 Rev. *D Page 21 of 28
AC Electrical Specifications
Parameter
Description
Condition
Min.
Max.
Unit
Crystal
TDC
XIN Duty Cycle
The device will operate reliably with input
duty cycles up to 30/70 but the REF clock
duty cycle will not be within specification
47.5
52.5
%
TPERIOD
XIN Period
When XIN is driven from an external
clock source
69.841
71.0
ns
TR/TF
XIN Rise and Fall Times
Measured between 0.3VDD and 0.7VDD
–
10.0
ns
TCCJ
XIN Cycle to Cycle Jitter
As an average over 1-
s duration
–
500
ps
LACC
Long-term Accuracy
Over 150 ms
–
300
ppm
CPU at 0.7V (SSC refers to –0.5% spread spectrum)
TDC
CPUT and CPUC Duty Cycle
Measured at crossing point VOX @ 0.1s
45
55
%
TPERIOD
100-MHz CPUT and CPUC Period
Measured at crossing point VOX @ 0.1s
9.99900
10.0100
ns
TPERIOD
133-MHz CPUT and CPUC Period
Measured at crossing point VOX @ 0.1s
7.49925
7.50075
ns
TPERIOD
166-MHz CPUT and CPUC Period
Measured at crossing point VOX @ 0.1s
5.99940
6.00060
ns
TPERIOD
200-MHz CPUT and CPUC Period
Measured at crossing point VOX @ 0.1s
4.99950
5.00050
ns
TPERIOD
266-MHz CPUT and CPUC Period
Measured at crossing point VOX @ 0.1s
3.74963
3.75038
ns
TPERIOD
333-MHz CPUT and CPUC Period
Measured at crossing point VOX @ 0.1s
2.99970
3.00030
ns
TPERIOD
400-MHz CPUT and CPUC Period
Measured at crossing point VOX @ 0.1s
2.49975
2.50025
ns
TPERIODSS
100-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX @ 0.1s
9.99900
10.0100
ns
TPERIODSS
133-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX @ 0.1s
7.49925
7.50075
ns
TPERIODSS
166-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX @ 0.1s
5.99940
6.00060
ns
TPERIODSS
200-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX @ 0.1s
4.99950
5.00050
ns
TPERIODSS
266-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX @ 0.1s
3.74963
3.75038
ns
TPERIODSS
333-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX @ 0.1s
2.99970
3.00030
ns
TPERIODSS
400-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX @ 0.1s
2.49975
2.50025
ns
TPERIODAbs
100-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
@ 1 clock
9.91400
10.0860
ns
TPERIODAbs
133-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
@ 1 clock
7.41425
7.58575
ns
TPERIODAbs
166-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
@ 1 clock
5.91440
6.08560
ns
TPERIODAbs
200-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
@ 1 clock
4.91450
5.08550
ns
TPERIODAbs
266-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
@ 1 clock
3.66463
3.83538
ns
TPERIODAbs
333-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
@ 1 clock
2.91470
3.08530
ns
TPERIODAbs
400-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
@ 1 clock
2.41475
2.58525
ns
TPERIODSSAbs 100-MHz CPUT and CPUC Absolute
period, SSC
Measured at crossing point VOX
@ 1 clock
9.91400
10.1363
ns
TPERIODSSAbs 133-MHz CPUT and CPUC Absolute
period, SSC
Measured at crossing point VOX
@ 1 clock
7.41425
7.62345
ns
TPERIODSSAbs 166-MHz CPUT and CPUC Absolute
period, SSC
Measured at crossing point VOX
@ 1 clock
5.91440
6.11576
ns
TPERIODSSAbs 200-MHz CPUT and CPUC Absolute
period, SSC
Measured at crossing point VOX
@ 1 clock
4.91450
5.11063
ns