9880 datasheet(76/118 Pages) INTEL

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LXT9860/9880 — Advanced 10/100 Repeater with Integrated Management

Datasheet

Document #: 248987

Revision#: 003

Rev Date: 08/07/01

Table 30. I/O Electrical Characteristics

Parameter

Sym

Min

Typ

Max

Units

Test Conditions

Input Low voltage

VIL

––

0.8

TTL inputs

––

% VCC

CMOS inputs

––

1.0

Schmitt triggers

Input High voltage

VIH

2.0

––

TTL inputs

––

% VCC

CMOS inputs

VCC - 1.0

––

Schmitt triggers

Hysteresis voltage

–

1.0

––

Schmitt triggers

Output Low voltage

VOL

––

0.4

IOL = 1.6 mA

Output Low voltage (LED)

VOLL

––

1.0

IOLL = 10 mA

Output High voltage

VOH

2.2

––

VIOH = 40

µA

Input Low current

IIL

-100

––

µA

–

Input High current

IIH

––

100

µA

–

Output rise / fall time

TRF

–

310

CL = 15 pF

1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production

testing.

2. Does not apply to IRB pins. Refer to Table 31 and Table 32 for IRB I/O characteristics.

3. Applies to RESET, CLK25, IR100SNGL, IR100COL, IR100DATn, IR100CLK, and IR10CLK pins.

Table 31. 100 Mbps IRB Electrical Characteristics

Parameter

Sym

Min

Typ

Max

Units

Test Conditions

Output Low voltage

VOL

–

RL = 330

Ω

Output rise or fall time

TRF

–

410

CL =

15 pF

Input High voltage

VIH

VCC - 2.0

––

CMOS inputs

VCC - 1.0

––

IR100CLK (Schmitt trigger)

Input Low voltage

VIL

––

2.0

CMOS inputs

––

1.0

IR100CLK (Schmitt trigger)

Hysteresis voltage

–

1.0

––

IR100CLK (Schmitt trigger)

3.3V Operation

IR100CFS current

single drive

––

6.8

–

RL = 215

Ω

collision

––

13.5

–

RL = 215

Ω

IR100CFSBP current

single drive

––

16.1

–

RL = 91

Ω2

collision

––

31.8

–

RL = 91

Ω2

IR100CFS/BP voltage

single drive

––

1.83

–

collision

––

0.4

–

5.0V Operation

1. Typical values are at 25° C and are for design aid only; they are not guaranteed and not subject to

production testing.

2. 91

Ω resistors provide greater noise immunity. Systems using 91Ω resistors are backwards stackable with

systems using 100

Ω resistors.

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