IXP45X datasheet(110/148 Pages) INTEL

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Intel® IXP45X and Intel® IXP46X Product Line of Network Processors—Datasheet

Intel® IXP45X and Intel® IXP46X Product Line of Network Processors

Datasheet

August 2006

110

Document Number: 306261-004US

5.5.7

DDRI SDRAM Bus DC Parameters

5.5.8

Expansion Bus DC Parameters

IIL

Input-leakage current

0 < VIN < VCCP

-10

µA

CIN

Input-pin capacitance

CINMDIO

Input-pin capacitance

Table 36.

DDRI SDRAM Bus DC Parameters

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Notes

VDDRI_VREF

I/O Reference voltage

0.49*VCCM

0.51*VCCM

VIH

Input-high voltage

VDDRI_VREF+

0.15

VCCM+0.3

VIL

Input-low voltage

-0.3

VDDRI_VREF-

0.15

VOH

Output-high voltage

IOUT = -15mA

1.95

VOL

Output-low voltage

IOUT = 15mA

0.35

IIL

Input-leakage current

0 < VIN < VCCM

-10

µA

CIO

I/O-pin capacitance

Notes:

These values are typical values seen by the manufacturing process and are not tested.

Only 2.5V DDRI SDRAM is supported

Table 37.

Expansion Bus DC Parameters (Sheet 1 of 2)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Notes

VIH

Input-high voltage

2.0

VIL

Input-low voltage

0.8

VOHDRV0

Output-high voltage

IOUT = -8 mA

2.4

1, 2

VOLDRV0

Output-low voltage

IOUT = 8 mA

0.4

1, 2

VOHDRV1

Output-high voltage

IOUT = -14 mA

2.4

1, 3

VOLDRV1

Output-low voltage

IOUT = 14mA

0.4

1, 3

Notes:

These values are typical values seen by the manufacturing process and are not tested.

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.

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.

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 35.

MDI DC Parameters (Sheet 2 of 2)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Notes

Notes:

These values are typical values seen by the manufacturing process and are not tested.

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