Chapter 1: Cyclone III Device Datasheet
1–15
Switching Characteristics
PLL Specifications
Table 1–20 describes the PLL specifications for Cyclone III devices when operating in
the commercial junction temperature range (0°C to 85°C), the industrial junction
temperature range (–40°C to 100°C), and the automotive junction temperature range
(–40°Cto 125°C). For more information about PLL block, refer to “PLL Block” in
“Glossary” on page 1–27.
Table 1–20. Cyclone III Devices PLL Specifications (1)
(Part 1 of 2)
Parameter
Symbol
Min
5
Typ
—
—
—
—
—
—
Max
472.5
325
Unit
MHz
MHz
MHz
%
(2)
fIN
fINPFD
Input clock frequency
PFD input frequency
5
(3)
fVCO
PLL internal VCO operating range
600
40
—
—
1300
60
fINDUTY
Input clock duty cycle
Input clock cycle-to-cycle jitter for FINPFD 100 MHz
Input clock cycle-to-cycle jitter for FINPFD < 100 MHz
0.15
750
UI
(4)
tINJITTER_CCJ
ps
f
OUT_EXT (external clock output)
PLL output frequency
—
—
472.5
MHz
(2)
PLL output frequency (–6 speed grade)
—
—
—
45
—
—
—
—
50
—
472.5
450
402.5
55
MHz
MHz
MHz
%
fOUT (to global clock)
PLL output frequency (–7 speed grade)
PLL output frequency (–8 speed grade)
tOUTDUTY
tLOCK
Duty cycle for external clock output (when set to 50%)
Time required to lock from end of device configuration
1
ms
Time required to lock dynamically (after switchover,
reconfiguring any non-post-scale counters/delays or
areset is deasserted)
tDLOCK
—
—
1
ms
Dedicated clock output period jitter
—
—
—
—
—
—
—
—
—
—
—
—
—
—
300
30
ps
mUI
ps
(5)
F
OUT 100 MHz
tOUTJITTER_PERIOD_DEDCLK
F
OUT < 100 MHz
Dedicated clock output cycle-to-cycle jitter
300
30
(5)
F
OUT 100 MHz
tOUTJITTER_CCJ_DEDCLK
F
OUT < 100 MHz
mUI
ps
Regular I/O period jitter
650
75
(5)
F
OUT 100 MHz
tOUTJITTER_PERIOD_IO
F
OUT < 100 MHz
mUI
ps
Regular I/O cycle-to-cycle jitter
650
(5)
F
OUT 100 MHz
tOUTJITTER_CCJ_IO
F
OUT < 100 MHz
—
—
10
—
—
—
75
50
—
mUI
ps
tPLL_PSERR
tARESET
Accuracy of PLL phase shift
Minimum pulse width on areset signal.
ns
SCANCLK
cycles
(6)
tCONFIGPLL
Time required to reconfigure scan chains for PLLs
—
3.5
—
July 2012 Altera Corporation
Cyclone III Device Handbook
Volume 2
ALTERA [ ALTERA CORPORATION ]
