LXT970ATC datasheet(49/74 Pages) INTEL

49 / 74 page

Dual-Speed Fast Ethernet Transceiver — LXT970A

Datasheet

Table 26. Low Voltage Fault Detect Characteristics

Parameter

Sym

Min

Typ

Max

Units

Test Conditions

Detect Fault Threshold

VLT

3.4

–

4.0

–

Clear Fault Threshold

VLH

4.1

–

4.7

–

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

Table 27. 100BASE-TX Transceiver Characteristics

Parameter

Sym

Min

Typ

Max

Units

Test Conditions

Peak Differential Output Voltage

VOP

0.95

–

1.05

Note 2

Signal Amplitude Symmetry

Vss

–

102

Note 2

Signal Rise/Fall Time

TRF

3.0

–

5.0

Note 2

Rise/Fall Time Symmetry

TRFS

––

0.5

Note 2

Duty Cycle Distortion

DCD

––

± 0.5

Offset from 16ns

pulse width at 50% of

pulse peak

Overshoot/Undershoot

VOS

––

–

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.

Table 28. 100BASE-FX Transceiver Characteristics

Parameter

Sym

Min

Typ

Max

Units

Test Conditions

Transmitter

Peak Differential Output Voltage

(Single Ended)

VOP

0.6

–

1.0

–

Signal Rise/Fall Time

TRF

––

1.6

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

2.25

–

VCC - 0.5

–

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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