参数资料
型号: LFE3-35EA-6FN484C
厂商: LATTICE SEMICONDUCTOR CORP
元件分类: FPGA
中文描述: FPGA, PBGA484
封装: 23 X 23 MM, LEAD FREE, FPBGA-484
文件页数: 115/130页
文件大小: 2667K
代理商: LFE3-35EA-6FN484C
3-33
DC and Switching Characteristics
Lattice Semiconductor
LatticeECP3 Family Data Sheet
sysCLOCK PLL Timing
Over Recommended Operating Conditions
Parameter
Descriptions
Conditions
Clock
Min.
Typ.
Max.
Units
fIN
Input clock frequency (CLKI,
CLKFB)
Edge clock
2
500
MHz
Primary clock
2
420
MHz
fOUT
Output clock frequency (CLKOP,
CLKOS)
Edge clock
4
500
MHz
Primary clock
4
420
MHz
fOUT1
K-Divider output frequency
CLKOK
0.03125
250
MHz
fOUT2
K2-Divider output frequency
CLKOK2
0.667
166
MHz
fVCO
PLL VCO frequency
500
1000
MHz
fPFD
3
Phase detector input frequency
Edge clock
2
500
MHz
Primary clock
2
420
MHz
AC Characteristics
tPA
Programmable delay unit
65
130
260
ps
tDT
Output clock duty cycle
(CLKOS, at 50% setting)
Edge clock
45
50
55
%
fOUT 250 MHz
Primary clock
45
50
55
%
fOUT > 250MHz
Primary clock
30
50
70
%
tCPA
Coarse phase shift error
(CLKOS, at all settings)
-5
0
+5
% of
period
tOPW
Output clock pulse width high or
low
(CLKOS)
1.8
ns
tOPJIT
1
Output clock period jitter
fOUT 420MHz
200
p-p
420MHz > fOUT 100MHz
250
p-p
fOUT < 100MHz
0.025
UIPP
tSK
Input clock to output clock skew
when N/M = integer
——
500
p-p
tLOCK
2
Lock time
2 to 25 MHz
200
us
25 to 500 MHz
50
us
tUNLOCK
Reset to PLL unlock time to
ensure fast reset
50
ns
tHI
Input clock high time
90% to 90%
0.5
ns
tLO
Input clock low time
10% to 10%
0.5
ns
tIPJIT
Input clock period jitter
400
p-p
tRST
Reset signal pulse width high,
RESETM,
RESETK
10
ns
Reset signal pulse width high,
CNTRST
500
——
ns
1. Jitter sample is taken over 10,000 samples of the primary PLL output with clean reference clock with no additional I/O toggling.
2. Output clock is valid after tLOCK for PLL reset and dynamic delay adjustment.
3. Period jitter and cycle-to-cycle jitter numbers are guaranteed for
fPFD > 4MHz. For fPFD < 4MHz, the jitter numbers may not be met in cer-
tain conditions. Please contact the factory for
fPFD < 4MHz.
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