R
DC and Switching Characteristics
Table 7: Recommended Operating Conditions for User I/Os Using Single-Ended Standards
V
CCO for Drivers(2)
VREF
VIL
VIH
Min (V)
VREF + 0.1
VREF + 0.1
0.8
IOSTANDARD
Attribute
Min (V) Nom (V) Max (V) Min (V)
Nom (V)
Max (V)
Max (V)
HSTL_I_18
HSTL_III_18
LVCMOS12(4)
LVCMOS15(4)
LVCMOS18(4)
LVCMOS25(4,5)
LVCMOS33(4)
LVTTL
1.7
1.7
1.1
1.4
1.65
2.3
3.0
3.0
-
1.8
1.8
1.2
1.5
1.8
2.5
3.3
3.3
3.0
3.0
TBD
1.80
2.5
1.9
1.9
1.3
1.6
1.95
2.7
3.45
3.45
-
0.8
0.9
1.1
V
REF - 0.1
VREF - 0.1
0.38
-
1.1
-
-
-
-
-
-
-
0.38
0.8
-
-
-
0.38
0.8
-
-
-
0.7
1.7
-
-
-
0.8
2.0
-
-
-
0.8
2.0
PCI33_3(7)
PCI66_3(7)
PCIX(7)
-
-
-
0.9
1.5
-
-
-
-
-
-
-
-
0.9
1.5
-
-
TBD
TBD
SSTL18_I
1.70
2.3
1.90
2.7
0.833
1.15
0.900
1.25
0.969
1.35
V
REF - 0.125 VREF + 0.125
SSTL2_I
VREF - 0.15 VREF + 0.15
Notes:
1. Descriptions of the symbols used in this table are as follows:
V
V
V
V
-- the supply voltage for output drivers
-- the reference voltage for setting the input switching threshold
-- the input voltage that indicates a Low logic level
-- the input voltage that indicates a High logic level
CCO
REF
IL
IH
2. The V
rails supply only output drivers, not input circuits.
CCO
3. For device operation, the maximum signal voltage (V max) may be as high as V max. See Table 1.
IH
IN
4. There is approximately 100 mV of hysteresis on inputs using any LVCMOS standard.
5. All Dedicated pins (PROG_B, DONE, TCK, TDI, TDO, and TMS) use the LVCMOS25 standard and draw power from the V
rail (2.5V).
CCAUX
The Dual-Purpose configuration pins use the LVCMOS25 standard before the User mode. When using these pins as part of a standard 2.5V
configuration interface, apply 2.5V to the V lines of Banks 0, 1, and 2 at power-on as well as throughout configuration.
CCO
6. The Global Clock Inputs (GCLK0-GCLK15, RHCLK0-RHCLK7, and LHCLK0-LHCLK7) are Dual-Purpose pins to which any signal standard
may be assigned.
7. For more information, see "Virtex-II Pro and Spartan-3 3.3V PCI Reference Design" (XAPP653).
DS312-3 (v1.0) March 1, 2005
www.xilinx.com
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Advance Product Specification
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