Table 4.3 100base-tx transceiver characteristics, Table 4.4 10base-t transceiver characteristics, Note 4.6 – SMSC LAN9512 User Manual

Page 41: Note 4.7, Datasheet

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USB Hub with Integrated 10/100 Ethernet Controller

Datasheet

SMSC LAN9512

41

Revision 1.0 (04-20-09)

DATASHEET

Note 4.6

This is the total 5.5V input leakage for the entire device.

Note 4.7

XI can optionally be driven from a 25MHz single-ended clock oscillator.

Note 4.8

Measured at line side of transformer, line replaced by 100

Ω (+/- 1%) resistor.

Note 4.9

Offset from 16nS pulse width at 50% of pulse peak.

Note 4.10 Measured differentially.

Note 4.11 Min/max voltages guaranteed as measured with 100

Ω resistive load.

Table 4.3 100BASE-TX Transceiver Characteristics

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Peak Differential Output Voltage High

V

PPH

950

-

1050

mVpk

Note 4.8

Peak Differential Output Voltage Low

V

PPL

-950

-

-1050

mVpk

Note 4.8

Signal Amplitude Symmetry

V

SS

98

-

102

%

Note 4.8

Signal Rise and Fall Time

T

RF

3.0

-

5.0

nS

Note 4.8

Rise and Fall Symmetry

T

RFS

-

-

0.5

nS

Note 4.8

Duty Cycle Distortion

D

CD

35

50

65

%

Note 4.9

Overshoot and Undershoot

V

OS

-

-

5

%

Jitter

1.4

nS

Note 4.10

Table 4.4 10BASE-T Transceiver Characteristics

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Transmitter Peak Differential Output Voltage

V

OUT

2.2

2.5

2.8

V

Note 4.11

Receiver Differential Squelch Threshold

V

DS

300

420

585

mV

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