XA3S500E-4PQG208I Datasheet, PDF (18/37 Pages) Xilinx, Inc – Proven advanced 90-nanometer process technology

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Table 18: Output Timing Adjustments for IOB
Convert Output Time from
LVCMOS25 with 12mA Drive and
Fast Slew Rate to the Following
Signal Standard (IOSTANDARD)
Add the
Adjustment
Below
-4 Speed
Grade
Single-Ended Standards
LVTTL
Slow
2 mA
5.41
4 mA
2.41
6 mA
1.90
8 mA
0.67
12 mA
0.70
16 mA
0.43
Fast
2 mA
5.00
4 mA
1.96
6 mA
1.45
8 mA
0.34
12 mA
0.30
16 mA
0.30
LVCMOS33
Slow
2 mA
5.29
4 mA
1.89
6 mA
1.04
8 mA
0.69
12 mA
0.42
16 mA
0.43
Fast
2 mA
4.87
4 mA
1.52
6 mA
0.39
8 mA
0.34
12 mA
0.30
16 mA
0.30
LVCMOS25
Slow
2 mA
4.21
4 mA
2.26
6 mA
1.52
8 mA
1.08
12 mA
0.68
Fast
2 mA
3.67
4 mA
1.72
6 mA
0.46
8 mA
0.21
12 mA
0
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
ns
ns
ns
Table 18: Output Timing Adjustments for IOB (Continued)
Convert Output Time from
LVCMOS25 with 12mA Drive and
Fast Slew Rate to the Following
Signal Standard (IOSTANDARD)
Add the
Adjustment
Below
-4 Speed
Grade
Units
LVCMOS18
Slow
2 mA
5.24
ns
4 mA
3.21
ns
6 mA
2.49
ns
8 mA
1.90
ns
Fast
2 mA
4.15
ns
4 mA
2.13
ns
6 mA
1.14
ns
8 mA
0.75
ns
LVCMOS15
Slow
2 mA
4.68
ns
4 mA
3.97
ns
6 mA
3.11
ns
Fast
2 mA
3.38
ns
4 mA
2.70
ns
6 mA
1.53
ns
LVCMOS12
Slow
2 mA
6.63
ns
Fast
2 mA
4.44
ns
HSTL_I_18
0.34
ns
HSTL_III_18
0.55
ns
PCI33_3
0.46
ns
SSTL18_I
0.25
ns
SSTL2_I
–0.20
ns
Differential Standards
LVDS_25
–0.55
ns
BLVDS_25
0.04
ns
MINI_LVDS_25
–0.56
ns
LVPECL_25
Input Only
ns
RSDS_25
–0.48
ns
DIFF_HSTL_I_18
0.42
ns
DIFF_HSTL_III_18
0.55
ns
DIFF_SSTL18_I
0.40
ns
DIFF_SSTL2_I
0.44
ns
Notes:
1. The numbers in this table are tested using the methodology
presented in Table 19 and are based on the operating conditions
set forth in Table 6, Table 9, and Table 11.
2. These adjustments are used to convert output- and
three-state-path times originally specified for the LVCMOS25
standard with 12 mA drive and Fast slew rate to times that
correspond to other signal standards. Do not adjust times that
measure when outputs go into a high-impedance state.
DS635 (v2.0) September 9, 2009
www.xilinx.com
Product Specification
18