LXT971ABC datasheet(57/90 Pages) INTEL

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LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver

Datasheet

Document #: 249414

Revision #: 002

Rev. Date: August 7, 2002

Table 19. Digital I/O Characteristics2

Parameter

Symbol

Min

Typ1

Max

Units

Test Conditions

Input Low voltage

VIL

–

0.8

–

Input High voltage

VIH

2.0

–

Input current

-10

–

µA

0.0 < VI < VCC

Output Low voltage

VOL

–

0.4

IOL = 4 mA

Output High voltage

VOH

2.4

–

IOH = -4 mA

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

testing.

2. Applies to all pins except MII, LED, XI/XO, and SD/TP pins. Refer to Table 20 for MII I/O Characteristics,

Table 21 for XI/XO and Table 22 for LED Characteristics.

Table 20. Digital I/O Characteristics - MII Pins

Parameter

Symbol

Min

Typ1

Max

Units

Test Conditions

Input Low voltage

VIL

–

0.8

–

Input High voltage

VIH

2.0

–

Input current

-10

–

µA

0.0 < VI < VCCIO

Output Low voltage

VOL

–

0.4

IOL = 4 mA

Output High voltage

VOH

2.2

–

IOH = -4 mA, VCCIO = 3.3V

VOH

2.0

–

IOH = -4 mA, VCCIO = 2.5V

Driver output resistance

(Line driver output enabled)

RO2

–

100

–

VCCIO = 2.5V

RO2

–

100

–

VCCIO = 3.3V

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

testing.

2. Parameter is guaranteed by design; not subject to production testing.

Table 21. I/O Characteristics - REFCLK/XI and XO Pins

Parameter

Symbol

Min

Typ1

Max

Units

Test Conditions

Input Low Voltage

VIL

–

0.8

–

Input High Voltage

VIH

2.0

–

Input Clock Frequency Tolerance2

∆f

––

±100

ppm

–

Input Clock Duty Cycle2

Tdc

–

Input Capacitance

CIN

–3.0

–

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

testing.

2. Parameter is guaranteed by design; not subject to production testing.

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