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參數(shù)資料
| 型號： | XC7K420T-1FFG901E |
| 廠商： | XILINX INC |
| 元件分類： | FPGA |
| 英文描述： | FPGA, PBGA900 |
| 封裝： | LEAD FREE, FBGA-900 |
| 文件頁數(shù)： | 18/50頁 |
| 文件大小： | 1218K |
| 代理商： | XC7K420T-1FFG901E |
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Kintex-7 FPGAs Data Sheet: DC and Switching Characteristics
DS182 (v1.1) April 1, 2011
Advance Product Specification
25
Output Delay Measurements
Output delays are measured using a Tektronix P6245
TDS500/600 probe (< 1 pF) across approximately 4" of FR4
microstrip trace. Standard termination was used for all
testing. The propagation delay of the 4" trace is
characterized separately and subtracted from the final
measurement, and is therefore not included in the
Measurements and test conditions are reflected in the IBIS
models except where the IBIS format precludes it.
Parameters VREF, RREF, CREF, and VMEAS fully describe
the test conditions for each I/O standard. The most accurate
prediction of propagation delay in any given application can
be obtained through IBIS simulation, using the following
method:
1.
Simulate the output driver of choice into the generalized
test setup, using values from Table 29.
2.
Record the time to VMEAS.
3.
Simulate the output driver of choice into the actual PCB
trace and load, using the appropriate IBIS model or
capacitance value to represent the load.
4.
Record the time to VMEAS.
5.
decrease in delay yields the actual propagation delay of
the PCB trace.
X-Ref Target - Figure 4
Figure 4: Single Ended Test Setup
VREF
RREF
VMEAS
(voltage level when taking
delay measurement)
CREF
(probe capacitance)
FPGA Output
ds182_04_021611
X-Ref Target - Figure 5
Figure 5: Differential Test Setup
RREF VMEAS
+
–
CREF
FPGA Output
ds182_05_021611
Table 29: Output Delay Measurement Methodology
Description
I/O Standard
Attribute
RREF
(
)
CREF(1)
(pF)
VMEAS
(V)
VREF
(V)
LVCMOS, 3.3V
LVCMOS33
1M
0
1.65
0
LVCMOS, 2.5V
LVCMOS25
1M
0
1.25
0
LVCMOS, 1.8V
LVCMOS18
1M
0
0.9
0
LVCMOS, 1.5V
LVCMOS15
1M
0
0.75
0
LVCMOS, 1.2V
LVCMOS12
1M
0
0.75
0
HSTL (High-Speed Transceiver Logic), Class I
HSTL_I
50
0
VREF
0.75
HSTL, Class II
HSTL_II
25
0
VREF
0.75
HSTL, Class I, 1.8V
HSTL_I_18
50
0
VREF
0.9
HSTL, Class II, 1.8V
HSTL_II_18
25
0
VREF
0.9
SSTL (Stub Series Terminated Logic), Class I, 1.8V
SSTL18_I
50
0
VREF
0.9
SSTL, Class II, 1.8V
SSTL18_II
25
0
VREF
0.9
SSTL15
50
0
VREF
0.75
SSTL135
50
0
VREF
0.675
LVDS (Low-Voltage Differential Signaling), 2.5V
LVDS_25
100
0
0(2)
1.2
BLVDS (Bus LVDS), 2.5V
BLVDS_25
100
0
0
LVDCI/HSLVDCI, 1.8V
LVDCI_18, HSLVDCI_18
1M
0
0.9
0
LVDCI/HSLVDCI, 1.5V
LVDCI_15, HSLVDCI_15
1M
0
0.75
0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XC7K420T-1FFG901I | 制造商:Xilinx 功能描述:KINTEX-7 - Trays 制造商:Xilinx 功能描述:IC FPGA 380 I/O 901FCBGA 制造商:Xilinx 功能描述:IC FPGA 420K KINTEX-7 901FBGA |
| XC7K420T-2FF1156C | 制造商:Xilinx 功能描述:KINTEX-7 - Trays 制造商:Xilinx 功能描述:IC FPGA 400 I/O 1156FCBGA |
| XC7K420T-2FF1156I | 制造商:Xilinx 功能描述:KINTEX-7 - Trays 制造商:Xilinx 功能描述:IC FPGA 400 I/O 1156FCBGA |
| XC7K420T-2FF901C | 制造商:Xilinx 功能描述:KINTEX-7 - Trays 制造商:Xilinx 功能描述:IC FPGA 420K KINTEX-7 901FBGA |
| XC7K420T-2FF901I | 制造商:Xilinx 功能描述:KINTEX-7 - Trays 制造商:Xilinx 功能描述:IC FPGA 380 I/O 901FCBGA |
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