ML6652 datasheet(13/28 Pages) MICRO-LINEAR

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ML6652

January 2002

Preliminary Datasheet

GENERAL DESCRIPTION

The ML6652 Fast Ethernet Media Converter provides

signal conversion between the following standards:

• 10BASE-T to 10BASE-FL; (10Mbps twisted pair copper

media and 10Mbps 850nm fiber media)

• Proprietary 10BASE-T to 10BASE-1300nm Fiber;

(10Mbps twisted pair copper media and 10Mbps

1300nm fiber media).

• 100BASE-TX to 100BASE-SX/FX (100Mbps twisted pair

copper media and 1300nm or 850nm fiber media).

• 100BASE-FX to 100BASE-SX (100Mbps 850nm fiber

media and 100Mbps 1300nm fiber media).

The ML6652 supports conversion between Twisted Pair

Side, Fast Link Pulses (FLP) and Fiber Side, Fiber Link

Negotiation Pulses (FLNP). It supports ISO/IEC 8802.3,

IEEE 802.3, and TIA/EIA-785 including Auto-Negotiation

on both twisted pair and fiber optics.

The ML6652 data interfaces can all be configured in a

number of ways. The twisted pair inputs and outputs can

be configured in Twisted Pair Mode to interface with a 1:1

transformer for transmit and receive or in PECL/LVPECL

Mode to interface a PMD module. The fiber optic inputs

and outputs can be configured in Quantizer/Fiber Optic

Mode with an LED driver or in PECL/LVPECL Mode. LED

status outputs identify internal operational status.

The ML6652 operating modes are configurable through

control input pins (at power up) or through management

control registers that are programmable through an

interface protocol compatible with MII Serial

Management Interface as defined in IEEE 802.3-1998

standards.

CONFIGURABLE MODES

Operating Modes (Forced, Transparent And Non-

transparent)

1) FORCED 10Mbps only mode,

2) FORCED 100Mbps only mode,

3) NON-TRANSPARENT Half Duplex only, with Auto-

Negotiation

4) NON-TRANSPARENT Full and Half Duplex with Auto-

Negotiation

5) TRANSPARENT 10/100Mbps with Auto-Negotiation

6) NON-TRANSPARENT Special case

Interface Modes

1) Twisted pair interface

Twisted Pair (Transformer input) Mode or

PECL/LVPECL Mode

b) Fiber Optic Interface

Quantizer/Fiber Optic LED Driver Mode or

ii) PECL/LVPECL Mode

Special Modes

1) Power Down Mode

Configurable through:

(i) Control pin 24 or

(ii) Management control register

2) Loopback Test Modes

For the fiber optic interface or

The twisted pair interface

Both are configurable through the Management

control register and include bypassing clock and

data recovery blocks.

3) Transmitter Output Off Mode:

Twisted Pair or

Fiber Optic

Both are configurable through the Management

control registers or control pins TPOUTOFF# (pin

13) and FOOUTOFF# (pin 14).

4) Backup Link Mode

Configurable through Management control

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