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DC and Switching Characteristics
DS610-3 (v2.0) July 16, 2007 www.xilinx.com 15
Product Specification
R
Single-Ended I/O Standards
Table 10:
Recommended Operating Conditions for User I/Os Using Single-Ended Standards
IOSTANDARD
Attribute
V
CCO
for Drivers
(2)
V
REF
V
IL
V
IH
Min (V) Nom (V) Max (V) Min (V) Nom (V) Max (V) Max (V) Min (V)
LVTTL 3.0 3.3 3.6
V
REF
is not used for
these I/O standards
0.8 2.0
LVCMOS33
(4)
3.0 3.3 3.6 0.8 2.0
LVCMOS25
(4,5)
2.3 2.5 2.7 0.7 1.7
LVCMOS18
(4)
1.65 1.8 1.95 0.38 0.8
LVCMOS15
(4)
1.4 1.5 1.6 0.38 0.8
LVCMOS12
(4)
1.1 1.2 1.3 0.38 0.8
PCI33_3 3.0 3.3 3.6 0.3 • V
CCO
0.5 • V
CCO
PCI66_3 3.0 3.3 3.6 0.3 • V
CCO
0.5 • V
CCO
PCIX 3.0 3.3 3.6 0.35 • V
CCO
0.5 • V
CCO
HSTL_I 1.4 1.5 1.6 0.68 0.75 0.9 V
REF
- 0.1 V
REF
+ 0.1
HSTL_III 1.4 1.5 1.6
-0.9-V
REF
- 0.1 V
REF
+ 0.1
HSTL_I_18 1.7 1.8 1.9 0.8 0.9 1.1 V
REF
- 0.1 V
REF
+ 0.1
HSTL_II_18 1.7 1.8 1.9
-0.9-V
REF
- 0.1 V
REF
+ 0.1
HSTL_III_18 1.7 1.8 1.9
-1.1-V
REF
- 0.1 V
REF
+ 0.1
SSTL18_I 1.7 1.8 1.9 0.833 0.900 0.969 V
REF
- 0.125 V
REF
+ 0.125
SSTL18_II 1.7 1.8 1.9 0.833 0.900 0.969 V
REF
- 0.125 V
REF
+ 0.125
SSTL2_I 2.3 2.5 2.7 1.15 1.25 1.38 V
REF
- 0.150 V
REF
+ 0.150
SSTL2_II 2.3 2.5 2.7 1.15 1.25 1.38 V
REF
- 0.150 V
REF
+ 0.150
SSTL3_I 3.0 3.3 3.6 1.3 1.5 1.7 V
REF
- 0.2 V
REF
+ 0.2
SSTL3_II 3.0 3.3 3.6 1.3 1.5 1.7 V
REF
- 0.2 V
REF
+ 0.2
Notes:
1. Descriptions of the symbols used in this table are as follows:
V
CCO
– the supply voltage for output drivers
V
REF
– the reference voltage for setting the input switching threshold
V
IL
– the input voltage that indicates a Low logic level
V
IH
– the input voltage that indicates a High logic level
2. In general, the V
CCO
rails supply only output drivers, not input circuits. The exceptions are for LVCMOS25 inputs when V
CCAUX
= 3.3V range
and for PCI I/O standards.
3. For device operation, the maximum signal voltage (V
IH
max) can be as high as V
IN
max. See Table 3.
4. There is approximately 100 mV of hysteresis on inputs using LVCMOS33 and LVCMOS25 I/O standards.
5. All Dedicated pins (PROG_B, DONE, SUSPEND, TCK, TDI, TDO, and TMS) draw power from the V
CCAUX
rail and use the LVCMOS25 or
LVCMOS33 standard depending on V
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
CCO
lines of Banks 0, 1, and 2 at power-on as
well as throughout configuration.