DJLXT971ALCA4 datasheet(58/90 Pages) INTEL

Part #	DJLXT971ALCA4

Description	3.3V Dual-Speed Fast Ethernet PHY Transceiver

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Manufacturer	INTEL [Intel Corporation]

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LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver

58

Datasheet

Document #: 249414

Revision #: 002

Rev. Date: August 7, 2002

Table 22. I/O Characteristics - LED/CFG Pins

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions

Input Low Voltage

VIL

–

0.8

V

–

Input High Voltage

VIH

2.0

–

V

–

Input Current

II

-10

–

10

µA0 < VI < VCCIO

Output Low Voltage

VOL

–

0.4

V

IOL = 10 mA

Output High Voltage

VOH

2.0

–

V

IOH = -10 mA

Table 23. I/O Characteristics – SD/TP Pin

Parameter

Sym

Min

Typ1

Max

Units

Test Conditions

Reset and Power-Up States – FX/TP Mode Configuration

Fiber Mode (Register bit 16.0 = 1)

VFX

600

1600-2400

–

mV

–

Twisted-Pair Mode (Register bit 16.0 = 0)

VTP

–

GND

500

mV

–

100BASE-FX Mode Normal Operation – SD Input from Fiber Transceiver

Input Low Voltage

VIL

1.49

1.6

1.83

V

VCCD = 3.3 V

Input High Voltage

VIH

2.14

2.4

2.42

V

VCCD = 3.3 V

1. Typical values are for design aid only; not guaranteed and not subject to production testing.

Table 24. 100BASE-TX Transceiver Characteristics

Parameter

Symbol

Min

Typ1

Max

Units

Test Conditions

Peak differential output voltage

VP

0.95

–

1.05

V

Note 2

Signal amplitude symmetry

Vss

98

–

102

%

Note 2

Signal rise/fall time

TRF

3.0

–

5.0

ns

Note 2

Rise/fall time symmetry

TRFS

–

0.5

ns

Note 2

Duty cycle distortion

DCD

35

50

65

%

Offset from 16 ns pulse

width at 50% of pulse

peak

Overshoot/Undershoot

VOS

––

5

%

–

Jitter (measured differentially)

–

1.4

ns

–

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

testing.

2. Measured at the line side of the transformer, line replaced by 100

Ω(+/-1%) resistor.

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