Virtex-6 CXT Family Data Sheet
DS153 (v1.6) February 11, 2011
Product Specification
46
TSTATPHAOFFSET
0.12
ns
TOUTJITTER
Note 1
TOUTDUTY
MMCM Output Clock Duty Cycle Precisio
n(5)0.20
ns
TLOCKMAX
MMCM Maximum Lock Time
100
s
FOUTMAX
MMCM Maximum Output Frequency
700
MHz
FOUTMIN
4.69
MHz
TEXTFDVAR
External Clock Feedback Variation
< 20% of clock input period or 1 ns
Max
RSTMINPULSE
Minimum Reset Pulse Width
1.5
ns
FPFDMAX
Maximum Frequency at the Phase Frequency Detector
with Bandwidth Set to High or Optimize
d(8)450
MHz
Maximum Frequency at the Phase Frequency Detector
with Bandwidth Set to Low
300
MHz
FPFDMIN
Minimum Frequency at the Phase Frequency Detector
with Bandwidth Set to High or Optimized
135
MHz
Minimum Frequency at the Phase Frequency Detector
with Bandwidth Set to Low
10.00
MHz
TFBDELAY
Maximum Delay in the Feedback Path
3 ns Max or one CLKIN cycle
TMMCMDCK_PSEN/
TMMCMCKD_PSEN
Setup and Hold of Phase Shift Enable
1.04/0.00
ns
TMMCMDCK_PSINCDEC/
TMMCMCKD_PSINCDEC
Setup and Hold of Phase Shift Increment/Decrement
1.04/0.00
ns
TMMCMCKO_PSDONE
Phase Shift Clock-to-Out of PSDONE
0.38
ns
Notes:
1.
When DIVCLK_DIVIDE = 3 or 4, FINMAX is 315 MHz.
2.
The MMCM does not filter typical spread-spectrum input clocks because they are usually far below the bandwidth filter frequencies.
3.
The static offset is measured between any MMCM outputs with identical phase.
4.
Values for this parameter are available in the Architecture Wizard.
5.
Includes global clock buffer.
6.
Calculated as FVCO/128 assuming output duty cycle is 50%.
7.
When CASCADE4_OUT = TRUE, FOUTMIN is 0.036 MHz.
8.
In ISE software 12.3 (or earlier versions supporting the Virtex-6 family), the phase frequency detector Optimized bandwidth setting is
equivalent to the High bandwidth setting. Starting with ISE software 12.4, the Optimized bandwidth setting is automatically adjusted to Low
when the software can determine that the phase frequency detector input is less than 135 MHz.
Table 57: MMCM Specification (Cont’d)
Symbol
Description
Speed Grade
Units
-2
-1