Timing Specifications
PLL Timing Specifications
Table 5–54 describes the Cyclone II PLL specifications when operating in
the commercial junction temperature range (0° to 85° C), the industrial
junction temperature range (–40° to 100° C), the automotive junction
temperature range (–40° to 125° C), and the extended temperature range
(–40° to 125° C). Follow the PLL specifications for –8 speed grade devices
when operating in the industrial, automotive, or extended temperature
range.
Table 5–54. PLL Specifications Note (1) (Part 1 of 2)
Symbol
Parameter
Min
Typ
Max
Unit
fIN
Input clock frequency (–6 speed grade)
Input clock frequency (–7 speed grade)
Input clock frequency (–8 speed grade)
PFD input frequency (–6 speed grade)
PFD input frequency (–7 speed grade)
PFD input frequency (–8 speed grade)
Input clock duty cycle
10
10
10
10
10
10
40
—
—
—
—
—
—
—
—
200
—
—
—
—
—
—
—
(4)
(4)
MHz
MHz
MHz
MHz
MHz
MHz
%
(4)
fINPFD
402.5
402.5
402.5
60
fINDUTY
tINJITTER (5)
Input clock period jitter
—
ps
fOUT_EXT (external
clock output)
PLL output frequency (–6 speed grade)
PLL output frequency (–7 speed grade)
PLL output frequency (–8 speed grade)
PLL output frequency (–6 speed grade)
PLL output frequency (–7 speed grade)
PLL output frequency (–8 speed grade)
10
10
10
10
10
10
45
(4)
MHz
MHz
MHz
MHz
MHz
MHz
%
(4)
(4)
fOUT (to global clock)
500
450
402.5
55
tOUTDUTY
Duty cycle for external clock output (when
set to 50%)
tJITTER (p-p) (2)
Period jitter for external clock output
fOUT_EXT > 100 MHz
—
—
300
ps
fOUT_EXT ≤100 MHz
—
—
—
—
30
mUI
tLOCK
Time required to lock from end of device
configuration
100 (6)
μs
tPLL_PSERR
Accuracy of PLL phase shift
—
—
60
ps
5–66
Altera Corporation
February 2008
Cyclone II Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
