XQ5VLX30T Datasheet, PDF (55/74 Pages) Xilinx, Inc – Virtex-5Q FPGA Data Sheet

Virtex-5Q FPGA Data Sheet: DC and Switching Characteristics
Table 78: Input Clock Tolerances
Symbol
Description
Frequency Range
Value Units
Duty Cycle Input Tolerance (in %)
T_{DUTYCYCRANGE_1}
T_{DUTYCYCRANGE_1_50}
T_{DUTYCYCRANGE_50_100}
T_{DUTYCYCRANGE_100_200}
T_{DUTYCYCRANGE_200_400}
T_{DUTYCYCRANGE_400}
PSCLK only
PSCLK and CLKIN
Input Clock Cycle-Cycle Jitter (Low Frequency Mode)
T_CYCLFDLL
T_CYCLFFX
CLKIN (using DLL outputs)⁽¹⁾
CLKIN (using DFS outputs)⁽²⁾
Input Clock Cycle-Cycle Jitter (High Frequency Mode)
T_CYCHFDLL
T_CYCHFFX
CLKIN (using DLL outputs)⁽¹⁾
CLKIN (using DFS outputs)⁽²⁾
Input Clock Period Jitter (Low Frequency Mode)
T_PERLFDLL
T_PERLFFX
CLKIN (using DLL outputs)⁽¹⁾
CLKIN (using DFS outputs)⁽²⁾
Input Clock Period Jitter (High Frequency Mode)
T_PERHFDLL
T_PERHFFX
CLKIN (using DLL outputs)⁽¹⁾
CLKIN (using DFS outputs)⁽²⁾
Feedback Clock Path Delay Variation
< 1 MHz
1 - 50 MHz
50 - 100 MHz
100 - 200 MHz
200 - 400 MHz⁽⁴⁾
> 400 MHz
Speed Grade
-2I
-1I
300.00
345.00
300.00
345.00
25 - 75
25 - 75
30 - 70
40 - 60
45 - 55
45 - 55
-1M
345.00
345.00
150.00
150.00
173.00
173.00
173.00
173.00
1.00
1.15
1.15
1.00
1.15
1.15
1.00
1.15
1.15
1.00
1.15
1.15
%
%
%
%
%
%
Units
ps
ps
ps
ps
ns
ns
ns
ns
T_{CLKFB_DELAY_VAR}
CLKFB off-chip feedback
1.00
1.15
1.15
ns
Notes:
1. DLL Outputs are used in these instances to describe the outputs: CLK0, CLK90, CLK180, CLK270, CLK2X, CLK2X180, and CLKDV.
2. DFS Outputs are used in these instances to describe the outputs: CLKFX and CLKFX180.
3. If both DLL and DFS outputs are used, follow the more restrictive specifications.
4. This duty cycle specification does not apply to the GTP_DUAL to DCM or GTX_DUAL to DCM connection. The GTP transceivers drive the
DCMs at the following frequencies: 320 MHz for -1I speed grade devices, or 375 MHz for -2I speed grade devices. The GTX transceivers
drive the DCMs at the following frequencies: 450 MHz for -1I speed grade devices or 500 MHz for
-2I speed grade devices.
DS714 (v2.1) July 23, 2010
www.xilinx.com
Product Specification
55