IGLOO DC and Switching Characteristics
Ad vance v0.5
2-29
Table 2-34 Summary of I/O Timing Characteristics—Software Default Settings, Std. Speed Grade,
Commercial-Case Conditions: TJ = 70°C, Worst-Case VCC = 1.14 V, Worst-Case VCCI = 3.0 V
Applicable to Standard Plus I/O Banks
I/
O
Sta
n
d
a
rd
Drive
St
re
ngth
(mA)
Slew
Ra
te
Ca
pac
itiv
e
Load
(p
F)
Ext
er
na
lResist
or
(Ω
)
t DO
U
T
(ns)
t DP
(ns)
t DI
N
(ns)
t PY
(ns)
t EO
U
T
(n
s)
t ZL
(ns)
t ZH
(ns)
t LZ
(ns)
t HZ
(ns)
t ZLS
(ns)
t ZH
S
(ns)
Units
3.3 V LVTTL /
3.3 V LVCMOS
12 mA
High 5 pF
–
1.55 2.30 0.26 0.97 1.10 2.34 1.87 2.91 3.62 8.15 7.67
ns
2.5 V LVCMOS
12 mA
High
5 pF
–
1.55 2.28 0.26 1.20 1.10 2.32 1.95 2.92 3.50 8.13 7.75
ns
1.8 V LVCMOS
8 mA
High
5 pF
–
1.55 2.42 0.26 1.11 1.10 2.47 2.16 2.98 3.38 8.28 7.97
ns
1.5 V LVCMOS
4 mA
High
5 pF
–
1.55 2.67 0.26 1.27 1.10 2.72 2.39 3.05 3.36 8.53 8.20
ns
1.2 V LVCMOS
2 mA
High
5 pF
–
1.55 3.23 0.26 1.58 1.10 3.09 2.76 3.30 3.49 8.69 8.36
ns
3.3 V PCI
Per PCI
spec
High 10pF 25 2 1.55 2.52 0.26 0.85 1.10 2.57 1.98 2.91 3.62 8.37 7.78
ns
3.3 V PCI-X
Per PCI-X
spec
High 10pF 25 2 1.55 2.52 0.25 0.85 1.10 2.57 1.98 2.91 3.62 8.37 7.78
ns
Notes:
1. For specific junction temperature and voltage supply levels, refer to Table 2-7 on page 2-7 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 2-35 Summary of I/O Timing Characteristics—Software Default Settings, Std. Speed Grade,
Commercial-Case Conditions: TJ = 70°C, Worst-Case VCC = 1.14 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
Capacitive
Load
(pF)
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
–
1.55
2.37
0.26
0.94
1.10
2.42
1.92
2.39
2.94
ns
2.5 V LVCMOS
8 mA
High
5 pF
–
1.55
2.38
0.26
1.15
1.10
2.42
2.05
2.37
2.79
ns
1.8 V LVCMOS
4 mA
High
5 pF
–
1.55
2.60
0.26
1.08
1.10
2.64
2.33
2.37
2.61
ns
1.5 V LVCMOS
2 mA
High
5 pF
–
1.55
2.91
0.26
1.22
1.10
2.96
2.60
2.39
2.54
ns
1.2 V LVCMOS
1 mA
High
5 pF
–
1.55
3.60
0.26
1.52
1.10
3.45
3.04
2.52
2.50
ns
Notes:
1. For specific junction temperature and voltage supply levels, refer to Table 2-7 on page 2-7 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.