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EP2C8Q208C6 Datasheet, PDF (156/168 Pages) Altera Corporation – Section I. Cyclone II Device Family Data Sheet | |||
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Timing Specifications
PLL Timing Specifications
Table 5â54 describes the Cyclone II PLL specifications when operating in
the commercial junction temperature range (0° to 85° C), the industrial
junction temperature range (â40° to 100° C), the automotive junction
temperature range (â40° to 125° C), and the extended temperature range
(â40° to 125° C). Follow the PLL specifications for â8 speed grade devices
when operating in the industrial, automotive, or extended temperature
range.
Table 5â54. PLL Specifications Note (1) (Part 1 of 2)
Symbol
Parameter
Min
fI N
Input clock frequency (â6 speed grade)
10
Input clock frequency (â7 speed grade)
10
Input clock frequency (â8 speed grade)
10
fI N P F D
PFD input frequency (â6 speed grade)
10
PFD input frequency (â7 speed grade)
10
PFD input frequency (â8 speed grade)
10
fI N D U T Y
Input clock duty cycle
40
tI N J I T T E R (5)
Input clock period jitter
â
fO U T _ E X T (external
PLL output frequency (â6 speed grade)
10
clock output)
PLL output frequency (â7 speed grade)
10
PLL output frequency (â8 speed grade)
10
fO U T (to global clock) PLL output frequency (â6 speed grade)
10
PLL output frequency (â7 speed grade)
10
PLL output frequency (â8 speed grade)
10
tO U T D U T Y
Duty cycle for external clock output (when 45
set to 50%)
tJ I T T E R (p-p) (2)
Period jitter for external clock output
â
fO U T _ E X T > 100 MHz
fO U T _ E X T â¤100 MHz
â
tL O C K
Time required to lock from end of device
â
configuration
tPLL_PSERR
Accuracy of PLL phase shift
â
Typ
Max
Unit
â
(4)
MHz
â
(4)
MHz
â
(4)
MHz
â
402.5
MHz
â
402.5
MHz
â
402.5
MHz
â
60
%
200
â
ps
â
(4)
MHz
â
(4)
MHz
â
(4)
MHz
â
500
MHz
â
450
MHz
â
402.5
MHz
â
55
%
â
300
ps
â
30
mUI
â
100 (6)
μs
â
±60
ps
5â66
Cyclone II Device Handbook, Volume 1
Altera Corporation
February 2008
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