ProASIC3 DC and Switching Characteristics
2- 54
v1.1
3.3 V PCI, 3.3 V PCI-X
Peripheral Component Interface for 3.3 V standard specifies support for 33 MHz and 66 MHz PCI
Bus applications.
AC loadings are defined per the PCI/PCI-X specifications for the datapath; Actel loadings for enable
Table 2-71 1.5 V LVCMOS High Slew
Commercial-Case Conditions: TJ = 70°C, Worst-Case VCC = 1.425 V, Worst-Case VCCI = 3.0 V
Applicable to Standard I/O Banks
Drive
Strength
Speed
Grade
tDOUT
tDP
tDIN
tPY
tEOUT
tZL
tZH
tLZ
tHZ
Units
2 mA
–F
0.79
9.18
0.05
1.70
0.51
7.58
9.18
2.94
ns
Std.
0.66
7.65
0.04
1.42
0.43
6.31
7.65
2.45
ns
–1
0.56
6.50
0.04
1.21
0.36
5.37
6.50
2.08
ns
–2
0.49
5.71
0.03
1.06
0.32
4.71
5.71
1.83
ns
Notes:
1. Software default selection highlighted in gray.
2. For specific junction temperature and voltage supply levels, refer to Table 2-6 on page 2-6 for derating values.
Table 2-72 1.5 V LVCMOS Low Slew
Commercial-Case Conditions: TJ = 70°C, Worst-Case VCC = 1.425 V, Worst-Case VCCI = 3.0 V
Applicable to Standard I/O Banks
Drive
Strength
Speed
Grade
tDOUT
tDP
tDIN
tPY
tEOUT
tZL
tZH
tLZ
tHZ
Units
2 mA
–F
0.79
14.81
0.05
1.70
0.51
14.17
14.81
2.94
2.79
ns
Std.
0.66
12.33
0.04
1.42
0.43
11.79
12.33
2.45
2.32
ns
–1
0.56
10.49
0.04
1.21
0.36
10.03
10.49
2.08
1.98
ns
–2
0.49
9.21
0.03
1.06
0.32
8.81
9.21
1.83
1.73
ns
Note: For specific junction temperature and voltage supply levels, refer to Table 2-6 on page 2-6 for derating values.
Table 2-73 Minimum and Maximum DC Input and Output Levels
3.3 V PCI/PCI-X
VIL
VIH
VOL
VOH
IOL IOH
IOSL
IOSH
IIL
IIH
Drive Strength
Min, V Max, V Min, V Max, V Max, V Min, V mA mA Max, mA1 Max, mA1 A2 A2
Per PCI specification
Per PCI curves
10
Notes:
1. Currents are measured at high temperature (100°C junction temperature) and maximum voltage.
2. Currents are measured at 85°C junction temperature.
Figure 2-10 AC Loading
Test Point
Enable Path
R to V
for t /t /t
CCI
LZ ZL
ZLS
10 pF for t
/t
/t /t
ZH ZHS
ZLS
ZL
5 pF for tHZ /tLZ
R to GND for t
/t
HZ
ZH
ZHS
R = 1 k
Test Point
Datapath
R = 25
R to VCCI for tDP (F)
R to GND for tDP (R)