AC208-DS03-R datasheet(49/58 Pages) BOARDCOM

49 / 58 page

Preliminary Data Sheet

AC208

07/08/02

B roa dcom

Document

AC208-DS04-405-R

Operating Range

Page 41

100BASE-TX TRANSCEIVER CHARACTERISTICS

10BASE-T TRANSCEIVER CHARACTERISTICS

Table 46: 100BASE-TX Transceiver Characteristics

Parameter

Symbol

Conditions

Minimum

Typical

Maximum Units

Peak to Peak Differential

Output Voltage

Note 1

1.9

2.0

2.1

Output Voltage Symmetry

Vss

Note 1

0.98

1.02

Signal Rise/Fall Time

Trf

Note 1

3.0

5.0

Rise/Fall Time Symmetry

Trfs

Note 1

0.5

Duty Cycle Distortion

Dcd

0.5

Overshoot/Undershoot

Vos

Output Jitter

Scrambled Idle

1.4

Receive Jitter Tolerance

Output Current High

Ioh

1:1 Transformer

Output Current High

Ioh

1.25:1

Transformer

Common Mode Input Voltage

1.25

Differential Input Resistance

Ω

Note 1: 50

Ω (± 1%) resistor to VCC on each output

Table 47: 10BASE-T Transceiver Characteristics

Parameter

Symbol

Conditions

Minimum

Typical

Maximum

Units

Peak to Peak Differential

Output Voltage

Vop

Note 1

4.4

5.6

Start of Idle Pulse Width

300

350

Output Jitter

1.4

Receive Jitter Tolerance

Differential Squelch Threshold

Vds

300

400

500

Common Mode Rejection

Note 1: 50

Ω (± 1%) resistor to VCC on each output

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