ML6652EH データシートの表示（PDF） - Micro Linear Corporation

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ML6652EH

10/100Mbps Ethernet Fiber and Copper Media Converter with Auto-Negotiation

Micro Linear Corporation 

ML6652

PIN DESCRIPTIONS (continued)

Pin No. Signal Name

I/O

Description

8

PECLQU

I

The fiber interface is selected as shown in Table 3.

When using an LED driver and fiber optic receiver, this pin also defines the

maximum supported link distance.

When the 300m maximum link length is selected, the voltage thresholds for

Signal Detect are increased.

PECLQU

Voltage

0

1/3 of VCC

2/3 of VCC

VCC

Interfaces at PECLQU

FOINP/FOINN and <30.7>

IOUT/IOUT# Default

Quantizer andLED

0

Driver

PECL/LVPECL

1

Quantizer and LED

0

Driver

Quantizer and LED

0

Driver

Fiber Optic

Link Length

10BASE/100BASE

2Km/300m

PCB Traces

2Km/2Km

300m/300m

SHORTFO Wavelength

<30.5>

Default

0

850nm

0

NA

0

1300nm

1

850/1300nm

LONGWL

<30.6>

Default

0

0

1

0

Table 3.

25

DUPLEX

Note: The ML6652 fiber interface quantizer sensitivity can be adjusted via

Register 30 bits 5, 6 and 7 to accomodate various cable lengths and signal

intensity.

I

This input can have one of three levels: VCC, VCC/2 or 0 Volts. This input has

80kΩ resistors internally connected to both VCC and Ground, generating VCC/

2 at the input if left unconnected. Settings defined by the DUPLEX power up

preset pin can be over written by the management interface. At power up the

DUPLEX pin causes the following default values to be written to management

register 30.

Note: this pin is typically read a few microseconds after power-up, if it is tied

to supplies that do not track the ML6652 power improper results will occur.

Use VCCD (pin 19) as the pull up point, do not add decoupling capacitors to

this input pin (without thoroughly understanding your PCB layout dynamics the

safest course is to make short connections and do not add decoupling

capacitors to this input pin).

DUPLEX Voltage

0

VCC/2

VCC

TRANSPARENT#

<30.11> Default

1

0

1

ADVERTFD#

<30.10> Default

1

0

0

ADVERTHD#

<30.15> Default

0

0

0

Table 4.

6

January 2004

Final Datasheet

DS6652-F-02

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