IGLOO DC and Switching Characteristics
Ad vance v0.5
2-27
Table 2-31 Summary of I/O Timing Characteristics—Software Default Settings, Std. Speed Grade,
Commercial-Case Conditions: TJ = 70°C, Worst-Case VCC = 1.425 V, Worst-Case VCCI = 3.0 V
Applicable to Standard Plus I/O Banks
I/O
Stand
a
rd
D
rive
Str
e
ngth
(mA)
Sl
ew
Ra
te
Capaci
ti
ve
Load
(pF)
Ex
te
rn
a
lR
e
sis
tor
(
Ω
)
t DOU
T
(ns)
t DP
(ns)
t DI
N
(ns)
t PY
(ns)
t EO
UT
(ns)
t ZL
(ns)
t ZH
(ns)
t LZ
(ns)
t HZ
(ns)
t ZL
S
(ns)
t ZH
S
(ns)
Un
it
s
3.3 V LVTTL /
3.3 V LVCMOS
12 mA
High
5 pF
–
0.97 1.75 0.19 0.85 0.66 1.78 1.39 2.36 2.79 5.31 4.92 ns
2.5 V LVCMOS
12 mA
High
5 pF
–
0.97 1.75 0.19 1.08 0.66 1.78 1.51 2.38 2.69 5.32 5.04 ns
1.8 V LVCMOS
8 mA
High
5 pF
–
0.97 1.97 0.19 1.01 0.66 2.01 1.76 2.46 2.66 5.54 5.29 ns
1.5 V LVCMOS
4 mA
High
5 pF
–
0.97 2.25 0.19 1.17 0.66 2.29 1.99 2.53 2.68 5.82 5.52 ns
3.3 V PCI
Per PCI
spec
High 10pF
25 2 0.97 1.96 0.19 0.73 0.66 2.00 1.50 2.36 2.79 5.53 5.03 ns
3.3 V PCI-X
Per
PCI-X
spec
High 10pF
25 2 0.97 1.96 0.19 0.70 0.66 2.00 1.50 2.36 2.79 5.53 5.03 ns
Notes:
1. For specific junction temperature and voltage supply levels, refer to Table 2-6 on page 2-6 for derating values.
2. Resistance is used to measure I/O propagation delays as defined in PCI specifications. See Figure 2-12 on page 2-62 for connectivity. This resistor is not required during normal operation.
Table 2-32 Summary of I/O Timing Characteristics—Software Default Settings, Std. Speed Grade,
Commercial-Case Conditions: TJ = 70°C, Worst-Case VCC = 1.425 V, Worst-Case VCCI = 3.0 V
Applicable to Standard I/O Banks
I/O
Stand
a
rd
Dr
iv
e
Str
e
ngth
(mA
)
Sl
e
w
Ra
te
Capac
itive
Load
(p
F)
Ex
te
rn
a
lRe
si
stor
(Ω
)
t DOU
T
(ns)
t DP
(ns)
t DIN
(ns)
t PY
(ns)
t EOU
T
(ns)
t ZL
(ns)
t ZH
(ns)
t LZ
(ns)
t HZ
(ns)
Units
3.3 V LVTTL /
3.3 V LVCMOS
8 mA
High
5 pF
–
0.97
1.85
0.19
0.83
0.66
1.88
1.45
1.96
2.26
ns
2.5 V LVCMOS
8 mA
High
5 pF
–
0.97
1.88
0.19
1.04
0.66
1.92
1.62
1.95
2.14
ns
1.8 V LVCMOS
4 mA
High
5 pF
–
0.97
2.18
0.19
0.98
0.66
2.22
1.93
1.96
2.06
ns
1.5 V LVCMOS
2 mA
High
5 pF
–
0.97
2.51
0.19
1.13
0.66
2.56
2.20
1.99
2.03
ns
Notes:
1. For specific junction temperature and voltage supply levels, refer to Table 2-6 on page 2-6 for derating values.
2. Resistance is used to measure I/O propagation delays as defined in PCI specifications. See Figure 2-12 on page 2-62 for connectivity. This resistor is not required during normal operation.