
Electrical Specifications
Intel IXP45X and Intel IXP46X Product Line of Network Processors Datasheet
May 2005
Document Number: 306261-002
123
5.5.8
Expansion Bus DC Parameters
VOL
Output-low voltage
IOUT = 15mA
0.35
V
IIL
Input-leakage current
0 < VIN < VCCM
-10
10
A
CIO
I/O-pin capacitance
5
pF
Table 37.
Expansion Bus DC Parameters
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
Notes
VIH
Input-high voltage
2.0
V
VIL
Input-low voltage
0.8
V
VOHDRV0
Output-high voltage
IOUT = -8 mA
2.4
V
VOLDRV0
Output-low voltage
IOUT = 8 mA
0.4
V
VOHDRV1
Output-high voltage
IOUT = -14 mA
2.4
V
VOLDRV1
Output-low voltage
IOUT = 14mA
0.4
V
VOHDRV2
Output-high voltage
IOUT = -20 mA
2.4
V
VOLDRV2
Output-low voltage
IOUT = 20 mA
0.4
V
IIL
Input-leakage current
0 < VIN < VCCP
-10
10
A
CIN
Input-pin capacitance
5
pF
NOTES:
1. These values are typical values seen by the manufacturing process and are not tested.
2. The values represented with this voltage parameter would typically be used in a system in which the
expansion bus interfaces a single load of 6pF placed less than 2 inches away from the IXP45X/IXP46X
network processors. This drive strength setting should be used to avoid ringing when minimal loading is
attached. Please use IBIS models and simulation tools to guarantee the design.
3. The values represented with this voltage parameter would typically be used in a system in which the
expansion bus interfaces four loads of 6pF each. All components are placed no further than 4 inches away
from the IXP45X/IXP46X network processors. This drive strength setting should be used to avoid ringing
when medium loading is attached. Please use IBIS models and simulation tools to guarantee the design.
4. The values represented with this voltage parameter would typically be used in a system in which the
expansion bus interfaces eight loads of 6pF and all components are placed less than 6 inches from the
IXP45X/IXP46X network processors. Another use case of this drive strength would typically be four loads
of 6pF operating at 80MHz. This drive strength setting should be used to avoid ringing when maximum
loading or frequency is utilized. Please use IBIS models and simulation tools to guarantee the design.
Table 36.
DDRI SDRAM Bus DC Parameters (Sheet 2 of 2)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
Notes
NOTES:
1. These values are typical values seen by the manufacturing process and are not tested.
2. Only 2.5V DDRI SDRAM is supported