LU5X34F 查看數據表（PDF） - Agere -> LSI Corporation

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LU5X34F

Quad Gigabit Ethernet Transceiver

Agere -> LSI Corporation 

Preliminary Data Sheet

July 2000

Application Section (continued)

LU5X34F

Quad Gigabit Ethernet Transceiver

HDOUTP

10 Ω†

68 Ω

ZO = 50 Ω 0.01 µF

TX(+)

50 Ω

191 Ω

TXA[9:0]

REFCLK

TRANSMIT

LU5X34F

50 Ω

HDOUTN

10 Ω†

OLREF OLRVS

*

0.1 µF

191 Ω

ZO = 50 Ω

0.01 µF

68 Ω

TRANSMIT

GBIC

TX(–)

5V

5-8811(F)b

* External resistor connected between OLREF and OLRVS. See Table 17 for resistor value vs. termination impedance and output swing.

† Damping resistor, maximum = 10 Ω.

Figure 10. Typical Termination for a Single-Channel, High-Speed Serial

Transmit Port Interfacing a 5 V GBIC Transceiver

Table 17. External Resistor Value vs. Differential Output Level Viewing

Resistor Value (Ω)

7.5 k/11.25 k

5 k/7.5 k

4 k/6 k

Termination Impedance (Ω)

50/75

Differential Output Voltage (V)

0.8

1.2

1.6

Lucent Technologies Inc.

21

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