R
Single-Ended I/O Standards
Table 9: Recommended Operating Conditions for User I/Os Using Single-Ended Standards
(2)
V
for Drivers
V
V
V
IH
CCO
REF
IL
IOSTANDARD
Attribute
Min (V) Nom (V) Max (V) Min (V)
Nom (V)
Max (V)
Max (V)
0.8
Min (V)
2.0
LVTTL
3.0
3.0
2.3
1.65
1.4
1.1
3.0
1.7
1.7
1.7
2.3
3.3
3.3
2.5
1.8
1.5
1.2
3.3
1.8
1.8
1.8
2.5
3.465
3.465
2.7
(4)
LVCMOS33
LVCMOS25
LVCMOS18
LVCMOS15
LVCMOS12
PCI33_3
0.8
2.0
(4,5)
0.7
1.7
V
is not used for
REF
1.95
1.6
0.4
0.8
these I/O standards
0.4
0.8
1.3
0.4
0.7
3.465
1.9
0.3 * V
0.5 * V
CCO
CCO
HSTL_I_18
0.8
-
0.9
1.1
1.1
-
V
V
- 0.1
- 0.1
V
V
+ 0.1
+ 0.1
REF
REF
REF
REF
HSTL_III_18
SSTL18_I
SSTL2_I
1.9
1.9
0.833
1.15
0.900
1.25
0.969
1.35
V
- 0.125
- 0.125
V
+ 0.125
+ 0.125
REF
REF
REF
REF
2.7
V
V
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 72 in DS312.
IH
IN
4. There is approximately 100 mV of hysteresis on inputs using LVCMOS33 and LVCMOS25 I/O standards.
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 LVCMOS 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. For information on PCI IP solutions, see www.xilinx.com/pci.
DS635 (v2.0) September 9, 2009
www.xilinx.com
Product Specification
11
XILINX [ XILINX, INC ]
