lc5256mv Lattice Semiconductor Corp., lc5256mv Datasheet - Page 43

• Manufacturer Part Number: lc5256mv
• Description: 3.3v, 2.5v And 1.8v In-system Programmable Expanded Programmable Logic Device Xpld? Family
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
sysCLOCK PLL Timing
t
t
t
t
f
f
f
f
f
f
t
t
T
t
t
t
t
t
t
t
t
Y
1. This condition assures that the output phase jitter will remain within specification.
2. Accumulated jitter measured over 10,000 waveform samples.
3. Internal timing for reference only.
PLL_SEC_DELA
PWH
PWL
R
INSTB
MDIVIN
MDIVOUT
NDIVIN
NDIVOUT
VDIVIN
VDIVOUT
OUTDUTY
JIT(CC)
CLK_OUT_DLY
PHASE
LOCK
PLL_DELAY
RANGE
PLL_RSTW
CLK_IN
JIT(PERIOD)
, t
Symbol
F
3
2
Input clock, high time
Input clock, low time
Input Clock, rise and fall time
Input clock stability, cycle to cycle (peak)
M Divider input, frequency range
M Divider output, frequency range
N Divider input, frequency range
N Divider output, frequency range
V Divider input, frequency range
V Divider output, frequency range
Output clock, duty cycle
Output clock, cycle to cycle jitter (peak)
Output clock, period jitter (peak)
Input clock to CLK_OUT delay
Input clock to external feedback delta
Time to acquire phase lock after input stable
Delay increment (Lead/Lag)
Total output delay range (lead/lag)
Minimum reset pulse width
Global clock input delay
Secondary PLL output delay (t
Parameter
Over Recommended Operating Conditions
PLL_DELAY
)
43
80% to 80%
20% to 20%
20% to 80%
Clean reference.
10 MHz < f
100MHz < f
Clean reference.
20 MHz < f
160MHz < f
Clean reference.
10 MHz < f
100MHz < f
Clean reference.
20 MHz < f
160MHz < f
Internal feedback
Typical = +/- 250ps
External feedback
MDIVOUT
MDIVOUT
MDIVOUT
MDIVOUT
VDIVIN
VDIVIN
VDIVIN
VDIVIN
Conditions
ispXPLD 5000MX Family Data Sheet
< 160 MHz
< 320 MHz
< 160 MHz
< 320 MHz
< 20 MHz or
< 320 MHz and
< 20 MHz or
< 320 MHz and
1
1
1
1
+/- 0.84 +/- 3.85
+/- 120 +/- 550
Min
100
1.2
1.2
10
10
10
10
10
40
—
—
—
—
—
—
—
—
—
—
—
—
+/- 250
+/- 250
+/- 150
+/- 300
+/- 150
Max
320
320
320
320
400
320
600
3.0
3.0
1.8
1.0
1.5
60
25
—
—
Units
MHz
MHz
MHz
MHz
MHz
MHz
ns
ns
ns
ps
ps
ps
ps
ps
ns
ps
us
ps
ns
ns
ns
ns
%