APEX 20K Programmable Logic Device Family Data Sheet
Figure 33. Relationship between VCCIO & VCCINT for 3.3-V PCI Compliance
2.7
VCCINT (V)
PCI-Compliant Region
2.5
2.3
3.0
3.1
3.3
3.6
VCCIO (V)
Figure 34 shows the typical output drive characteristics of APEX 20K
devices with 3.3-V and 2.5-V VCCIO. The output driver is compatible with
the 3.3-V PCI Local Bus Specification, Revision 2.2 (when VCCIOpins are
connected to 3.3 V). 5-V tolerant APEX 20K devices in the -1 speed grade
are 5-V PCI compliant over all operating conditions.
Figure 34. Output Drive Characteristics of APEX 20K Device
90
80
70
90
80
70
IOL
IOL
60
50
40
60
50
40
VCCINT = 2.5 V
VCCIO = 2.5 V
Room Temperature
V
CCINT = 2.5 V
Typical IO
Output
Current (mA)
Typical IO
Output
Current (mA)
VCCIO = 3.3 V
Room Temperature
30
20
10
30
20
10
IOH
IOH
1
2
3
1
2
3
VO Output Voltage (V)
VO Output Voltage (V)
Altera Corporation
69
ETC [ ETC ]
