mic3002 Micrel Semiconductor, mic3002 Datasheet

mic3002

Manufacturer Part Number

mic3002

Description

Mic3002 Fom Management Ic With Internal Calibration

Manufacturer

Micrel Semiconductor

Datasheet

1.MIC3002.pdf (65 pages)

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July 2007

General Description

The MIC3002 is a fiber optic module controller which enables

the implementation of sophisticated, hot-pluggable fiber optic

transceivers with intelligent laser control and an internally

calibrated Digital Diagnostic Monitoring Interface per SFF-

8472. It essentially integrates all non-datapath functions of an

SFP transceiver into a tiny (4mm x 4mm) MLF

also works well as a microcontroller peripheral in

transponders or 10Gbps transceivers.

A highly configurable automatic power control (APC) circuit

controls laser bias. Bias and modulation are temperature

compensated using dual DACs, an on-chip temperature

sensor, and NVRAM look-up tables. A programmable

internal feedback resistor provides a wide dynamic range for

the APC. Controlled laser turn-on facilitates hot plugging.

An analog-to-digital converter converts the measured

temperature, voltage, bias current, transmit power, and

received power from analog to digital. An EEPOT provides

front-end adjustment of RX power. Each parameter is

compared against user-programmed warning and alarm

thresholds. Analog comparators and DACs provide high-

speed monitoring of received power and critical laser

operating parameters. Data can be reported as either

internally calibrated or externally calibrated.

An interrupt output, power-on hour meter, and data-ready

bits add user friendliness beyond SFF-8472. The interrupt

output and data-ready bits reduce overhead in the host

system. The power-on hour meter logs operating hours using

an internal real-time clock and stores the result in NVRAM.

In addition to the features listed above which are already

implemented in the previous controller MIC3001, the

MIC3002 features an extensive temperature range, options

to mask alarms and warnings interrupt and TXFAULT, and

ability to support up to four chips with the same address on

the serial interface.

Communication with the MIC3002 is via an industry standard

2-wire serial interface. Nonvolatile memory is provided for

serial ID, configuration, and separate OEM and user

scratchpad spaces. Two-level password protection guards

against data corruption.

MLF and MicroLeadFrame are regIstered trademarks of Amkor Technology.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

package. It

Features

• Extensive temperature range

• Alarms and Warnings interrupt and TXFAULT masks

• Capability to support up to four chips on the serial

• LUT to compensate for chip-FOM case temperature

• APC or constant-current laser bias

• Turbo mode for APC loop start-up and shorter laser turn

• Supports multiple laser types and bias circuit topologies

• Integrated digital temperature sensor

• Temperature compensation of modulation, bias, and

• NVRAM to support GBIC/SFP serial ID function

• User writable EEPROM scratchpad

• Diagnostic monitoring interface per SFF-8472

• Power-on hour meter

• Interrupt capability

• Extensive test and calibration features

• 2-wire SMBus-compatible serial interface

• SFP/SFP+ MSA and SFF-8472 compliant

• 3.0V to 3.6V power supply range

• 5V-tolerant I/O

• Available in (4mm x 4mm) 24-pin MLF

Applications

• SFP/SFP+ optical transceivers

• SONET/SDH transceivers and transponders

• Fibre Channel transceivers

• 10Gbps transceivers

• Free space optical communications

• Proprietary optical links

interface

difference

on time

fault levels via NVRAM look-up tables

– Monitors and reports critical parameters:

– S/W control and monitoring of TXFAULT, RXLOS,

– Internal or external calibration

– EEPOT for adjusting RX power measurement

FOM Management IC with Internal

temperature, bias current, TX and RX optical power,

and supply voltage

RATESELECT, and TXDISABLE

MIC3002

hbwhelp@micrel.com

Calibration

or (408) 955-1690

M9999-073107-B

package

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