EP20K400EBC652-1N Altera, EP20K400EBC652-1N Datasheet - Page 50

• Manufacturer Part Number: EP20K400EBC652-1N
• Description: APEX 20KE
• Manufacturer: Altera

APEX 20K Programmable Logic Device Family Data Sheet
50
f
f
f
f
t
f
t
t
t
OUT
CLK1
CLK2
CLK4
OUTDUTY
CLKDEV
R
F
LOCK
Table 15. APEX 20K ClockLock & ClockBoost Parameters for -1 Speed-Grade Devices (Part 1 of 2)
Symbol
(1)
Output frequency
Input clock frequency (ClockBoost clock
multiplication factor equals 1)
Input clock frequency (ClockBoost clock
multiplication factor equals 2)
Input clock frequency (ClockBoost clock
multiplication factor equals 4)
Duty cycle for ClockLock/ClockBoost-generated
clock
Input deviation from user specification in the
Quartus II software (ClockBoost clock
multiplication factor equals 1)
Input rise time
Input fall time
Time required for ClockLock/ClockBoost to
acquire lock
(4)
Figure 30. Specifications for the Incoming & Generated Clocks
Note to
(1)
Table 15
parameters for -1 speed-grade devices.
ClockLock
Generated
Clock
The tI parameter refers to the nominal input clock period; the tO parameter refers
to the nominal output clock period.
Parameter
Input
Clock
Figure
summarizes the APEX 20K ClockLock and ClockBoost
t
30:
R
(2)
f
CLK1
t
OUTDUTY
f
CLK4
,
t
f
F
CLK2
,
t
INDUTY
t
t
O
O
t
t
I +
O +
Min
t
25
25
16
10
40
t
INCLKSTB
JITTER
t
O
t
JITTER
25,000
180
Max
180
90
48
60
10
5
5
t
(1)
I +
Altera Corporation
(3)
t
CLKDEV
Note (1)
PPM
MHz
MHz
MHz
MHz
Unit
ns
ns
µs
%