LXT971ABC datasheet(59/90 Pages) INTEL

59 / 90 page

LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver

Datasheet

Document #: 249414

Revision #: 002

Rev. Date: August 7, 2002

Table 25. 100BASE-FX Transceiver Characteristics

Parameter

Symbol

Min

Typ1

Max

Units

Test Conditions

Transmitter

Peak differential output voltage

(single ended)

VOP

0.6

–

1.5

–

Signal rise/fall time

TRF

–

1.9

10 <–> 90%

2.0 pF load

Jitter (measured differentially)

–

1.3

–

Receiver

Peak differential input voltage

VIP

0.55

–

1.5

–

Common mode input range

VCMIR

––

VCC - 0.7

–

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

testing.

Table 26. 10BASE-T Transceiver Characteristics

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions

Transmitter

Peak differential output

voltage

VOP

2.2

2.5

2.8

With transformer, line

replaced by 100

Ω

resistor

Transition timing jitter added

by the MAU and PLS

sections

–0

After line model

specified by IEEE

802.3 for 10BASE-T

MAU

Receiver

Receive Input Impedance

ZIN

–

Ω

–

Differential Squelch

Threshold

VDS

300

420

585

–

Table 27. 10BASE-T Link Integrity Timing Characteristics

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions

Time Link Loss Receive

TLL

–

150

–

Link Pulse

TLP

–

Link Pulses

–

Link Min Receive Timer

TLR MIN

2–

–

Link Max Receive Timer

TLR MAX

–

150

–

Link Transmit Period

Tlt

–

Link Pulse Width

Tlpw

–

150

–

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

testing.

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