CS8900 데이터 시트보기 (PDF) - Cirrus Logic

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CS8900

Highly-Integrated ISA Ethernet Controller

Cirrus Logic 

11.0 10BASE-T Wiring

CS8900

TXD + Rt

TXD -

Rt

68 pF

0.01 µF

1: 2

RXD+

+

- RXD-

0.01 µF

1:1

Rr

Rr

CS8900

TD +

1

TD -

2

RJ45

RD +

3

RD -

6

NOTES:

1. If a center tap transformer is used on the RXD+ and RXD- inputs, replace the pair of Rr resistors

with a single 2xRr resistor.

2. The Rt and Rr resistors are +/- 1% tolerance.

3. The CS8900 supports 100, 120, and 150Ω unshielded twisted pair cables. The proper

values of Rt and Rr, for a given cable impedance, are shown below:

Cable Impedance

Rt

Rr

(Ω)

(Ω)

(Ω)

100

24.3

49.9

120

30.1

60.4

150

37.4

75

DS150PP2

123

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