DS680 Datasheet, PDF (11/36 Pages) Xilinx, Inc – Space-Grade Virtex-4QV FPGAs

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Space-Grade Virtex-4QV FPGAs: DC and Switching Characteristics
IOB Pad Input/Output/3-State Switching Characteristics
Table 22 summarizes the values of standard-specific data
input delay adjustments, output delays terminating at pads
(based on standard and 3-state delays.
T_IOPI is described as the delay from IOB pad through the input
buffer to the I-pin of an IOB pad. The delay varies depending
on the capability of the SelectIO™ input buffer technology.
T_IOOP is described as the delay from the O pin to the IOB pad
through the output buffer of an IOB pad. The delay varies
depending on the capability of the SelectIO output buffer.
T_IOTP is described as the delay from the T pin to the IOB
pad through the output buffer of an IOB pad, when 3-state is
disabled. The delay varies depending on the SelectIO
capability of the output buffer.
Table 24, page 16 summarizes the value of T_IOTPHZ.
T_IOTPHZ is described as the delay from the T pin to the IOB
pad through the output buffer of an IOB pad, when 3-state is
enabled (for example, a high-impedance state).
Table 22: IOB Switching Characteristics^(1,2)
IOSTANDARD Attribute⁽¹⁾
LVDS_25
RSDS_25
LVDSEXT_25
LDT_25
BLVDS_25
ULVDS_25
PCI33_3 (PCI, 33 MHz, 3.3V)
PCI66_3 (PCI, 66 MHz, 3.3V)
PCI-X
GTL
GTLP
HSTL_I
HSTL_II
HSTL_III
HSTL_IV
HSTL_I _18
HSTL_II _18
HSTL_III _18
HSTL_IV_18
SSTL2_I
SSTL2_II
LVTTL, Slow, 2 mA
LVTTL, Slow, 4 mA
LVTTL, Slow, 6 mA
LVTTL, Slow, 8 mA
LVTTL, Slow, 12 mA
LVTTL, Slow, 16 mA
LVTTL, Slow, 24 mA
LVTTL, Fast, 2 mA
LVTTL, Fast, 4 mA
LVTTL, Fast, 6 mA
Speed Grade
-10
T_IOPI
1.28
T_IOOP
1.85
T_IOTP
1.85
1.28 1.85 1.85
1.30 1.91 1.91
1.28 1.82 1.82
1.28 2.34 2.34
1.28 1.83 1.83
0.97 3.02 3.02
0.97 2.72 2.72
0.97 2.25 2.25
1.63 2.03 2.03
1.68 2.03 2.03
1.64 2.35 2.35
1.64 2.13 2.13
1.64 2.22 2.22
1.64 2.03 2.03
1.60 2.21 2.21
1.60 2.16 2.16
1.60 2.09 2.09
1.60 2.06 2.06
1.68 2.43 2.43
1.68 2.16 2.16
0.97 7.03 7.03
0.97 5.04 5.04
0.97 4.91 4.91
0.97 4.91 4.91
0.97 3.96 3.96
0.97 3.46 3.46
0.97 3.12 3.12
0.97 4.86 4.86
0.97 3.46 3.46
0.97 3.00 3.00
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
DS680 (v2.0) April 12, 2010
www.xilinx.com
Product Specification
11