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Advanced 10/100 Unmanaged Repeater — LXT9883/9863

Datasheet

Document #: 249115

Revision #: 003

Rev. Date: 08/07/01

Table 25. 100BASE-TX Transceiver Electrical Characteristics

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions

Peak differential output voltage

(single ended)

0.95

1.0

1.05

Note 2

Signal amplitude symmetry

–

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

––

–

+/- 0.5

Offset from 8 ns pulse width at 50%

of pulse peak,

Overshoot

––

–

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

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

Ω (±1%) resistor.

Table 26. 10BASE-T Transceiver Electrical Characteristics

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions

Transmitter

Peak differential output voltage

2.2

2.5

2.8

Measured at line side of

transformer, line replaced by 100

Ω

(± .1%) resistor

Transmit timing jitter addition

–

0 line length for internal MAU

Transmit timing jitter added by the

MAU and PLS sections

2, 3

–

After line model specified by IEEE

802.3 for 10BASE-T internal MAU

Receiver

Receive input impedance

ZIN

–

Ω

Between TPIP/TPIN

Differential Squelch Threshold

VDS

–

390

–

5 MHz square wave input,

750 mVpp

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.

3. IEEE 802.3 specifies maximum jitter additions at 1.5 ns for the AUI cable, 0.5 ns from the encoder, and 3.5 ns from the MAU.

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