LU5X34F datasheet(21/26 Pages) AGERE

No. de pieza	LU5X34F

Descripción Electrónicos	Quad Gigabit Ethernet Transceiver

PDF	26 Pages

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Fabricante Electrónico	AGERE [Agere Systems]

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Lucent Technologies Inc.

Preliminary Data Sheet

LU5X34F

July 2000

Quad Gigabit Ethernet Transceiver

Application Section (continued)

* 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)

Termination Impedance (

Ω)

Differential Output Voltage (V)

7.5 k/11.25 k

50/75

0.8

5 k/7.5 k

1.2

4 k/6 k

1.6

5-8811(F)b

TX(+)

TX(–)

HDOUTP

HDOUTN

0.01

µF

Ω†

Ω

191

Ω

0.01

µF

TRANSMIT

LU5X34F

TRANSMIT

GBIC

OLREF

OLRVS

TXA[9:0]

REFCLK

Ω†

0.1

µF

ZO = 50

Ω

191

Ω

ZO = 50

Ω

5 V

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