DS031 Datasheet, PDF (84/318 Pages) Xilinx, Inc – Summary of Features

R
Virtex-II Platform FPGAs: DC and Switching Characteristics
Input Clock Tolerances
Table 39: Input Clock Tolerances
Speed Grade
Description
Input Clock Low/High Pulse Width
Symbol
Constraints
F_CLKIN
-6
Min Max
-5
Min Max
-4
Min Max
Units
PSCLK
PSCLK_PULSE
< 1MHz
25.00
25.00
25.00
ns
1 – 10 MHz
25.00
25.00
25.00
ns
10 – 25 MHz
10.00
10.00
10.00
ns
25 – 50 MHz
5.00
5.00
5.00
ns
50 – 100 MHz
3.00
3.00
3.00
ns
100 – 150 MHz 2.40
2.40
2.40
ns
PSCLK and CLKIN⁽³⁾
PSCLK_PULSE and
CLKIN_PULSE
150 – 200 MHz 2.00
2.00
2.00
ns
200 – 250 MHz 1.80
1.80
1.80
ns
250 – 300 MHz 1.50
1.50
1.50
ns
300 – 350 MHz 1.30
1.30
1.30
ns
350 – 400 MHz 1.15
1.15
1.15
ns
> 400 MHz
1.05
1.05
1.05
ns
Input Clock Cycle-Cycle Jitter (Low Frequency Mode)
CLKIN (using DLL outputs)⁽¹⁾
CLKIN_CYC_JITT_DLL_LF
CLKIN (using CLKFX outputs)⁽²⁾
CLKIN_CYC_JITT_FX_LF
±300
±300
±300
±300
±300 ps
±300 ps
Input Clock Cycle-Cycle Jitter (High Frequency Mode)
CLKIN (using DLL outputs)⁽¹⁾
CLKIN_CYC_JITT_DLL_HF
CLKIN (using CLKFX outputs)⁽²⁾
CLKIN_CYC_JITT_FX_HF
Input Clock Period Jitter (Low Frequency Mode)
CLKIN (using DLL outputs)⁽¹⁾
CLKIN_PER_JITT_DLL_LF
CLKIN (using CLKFX outputs)⁽²⁾
CLKIN_PER_JITT_FX_LF
Input Clock Period Jitter (High Frequency Mode)
CLKIN (using DLL outputs)⁽¹⁾
CLKIN_PER_JITT_DLL_HF
CLKIN (using CLKFX outputs)⁽²⁾
CLKIN_PER_JITT_FX_HF
Feedback Clock Path Delay Variation
±150
±150
±1
±1
±1
±1
±150
±150
±1
±1
±1
±1
±150 ps
±150 ps
±1
ns
±1
ns
±1
ns
±1
ns
CLKFB off-chip feedback
CLKFB_DELAY_VAR_EXT
±1
±1
±1
ns
Notes:
1. “DLL outputs” is used here to describe the outputs: CLK0, CLK90, CLK180, CLK270, CLK2X, CLK2X180, and CLKDV.
2. If both DLL and CLKFX outputs are used, follow the more restrictive specification.
3. If DCM phase shift feature is used and CLKIN frequency > 200 Mhz, CLKIN duty cycle must be within ±5% (45/55 to 55/45).
DS031-3 (v3.5) November 5, 2007
Product Specification
www.xilinx.com
Module 3 of 4
36