Networking Silicon — 82555

11.0Electrical Specifications and Timing Parameters

11.1Absolute Maximum Ratings

Symbol

Parameter Description

Min

Typ

Max

Units

 

 

 

 

 

 

 

 

 

 

 

 

TC

Case temperature under bias

0

 

85

C

TS

Storage temperature

-65

 

140

C

VSUP

Supply voltage

-0.5

 

7.0

V

a

All output voltages

-0.5

 

7.0

V

VOA

 

VOTD

Transmit Data Output Voltage

-0.5

 

8.0

V

VIA

All input voltages

-1.0

 

6.0

V

a. Stresses above the listed under absolute maximum ratings may cause permanent damage to the device. This is a stress rating only and functional operations of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Ex- posure to absolute maximum rating conditions for extended periods may affect device reliability.

11.2

General Operating Conditions

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Symbol

Parameter Description

Min

Typ

Max

Units

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

Supply voltage

4.75

 

5.25

V

 

 

TC

Case temperature

0

 

85

C

11.3

DC Characteristics

 

 

 

 

11.3.1MII DC Characteristics

Symbol

Parameter Description

Condition

Min

Typ

Max

Units

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIL

Input low voltage (TTL)

 

0

 

0.8

V

VIH

Input high voltage (TTL)

 

2.0

 

 

V

VOL

Output low voltage

Iout = 4 mA

 

 

0.45

V

VOH

Output high voltage

Iout = -4 mA

2.4

 

 

V

IIL

Input low leakage current

0 < Vin < VCC

 

 

±15

μA

CINa

Input capacitance

 

 

 

10

pF

a.This parameter is only characterized, not tested. It is valid for digital pins only.

11.3.210BASE-T Voltage/Current DC Characteristics

Symbol

Parameter Description

Condition

Min

Typ

Max

Units

 

 

 

 

 

 

 

 

 

 

 

 

 

 

a

Input differential resistance

DC and VRDP =

10

 

 

KΩ

RID10

(VCC/2) + 0.5 V

 

 

 

 

 

 

 

 

Datasheet

43

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Image 47
Intel 82555 manual Electrical Specifications and Timing Parameters, Absolute Maximum Ratings, General Operating Conditions