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Advanced 10/100 Unmanaged Repeater — LXT9883/9863

Datasheet

Document #: 249115

Revision #: 003

Rev. Date: 08/07/01

Table 22. 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

––

IOH = 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 23 and Table 24 for IRB I/O characteristics.

3. Applies to RESET, CLK25, IR100SNGL, IR100COL, IR100DV, IR100DATn, IR100CLK, and IR10CLK pins.

Table 23. 100 Mbps IRB Electrical Characteristics

Parameter

Symbol

Min

Typ1

Max

Units

Test Conditions

Output Low voltage

VOL

–

RL = 330

Ω

Output rise or fall time

TRF

–

410ns

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

–

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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