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MIC3001 Datasheet, PDF (1/74 Pages) Micrel Semiconductor – SFP Management IC with Internal Calibration | |||
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MIC3001
Micrel
MIC3001
SFP Management IC with Internal Calibration
General Description
The MIC3001 enables the implementation of sophisticated,
hot-pluggable fiber optic transceivers with intelligent laser
control and an internally calibrated Digital Diagnostic Moni-
toring Interface per SFF-8472. It essentially integrates all
non-datapath functions of an SFP transceiver into a tiny
4mm à 4mm MLF⢠package. It also works well as a
microcontroller peripheral in transponders or 10Gbps trans-
ceivers.
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 inter-
nal feedback resistor provides unprecedented dynamic range
for APC. Controlled laser turn-on facilitates hot-plugging.
An analog-to-digital converter converts the measured tem-
perature, voltage, bias current, transmit power, and received
power from analog to digital. An EEPOT provides frontend
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.
Communication with the MIC3001 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.
Features
⢠APC or constant-current laser bias
⢠Turbo mode for APC loop start-up and shorter laser turn
on time
⢠Supports multiple laser types and bias circuit topologies
⢠Drives external low-cost BJT for laser bias
⢠Integrated digital temperature sensor
⢠Temperature compensation of modulation, bias, and
fault levels via NVRAM look-up tables
⢠Direct interface to SY88932, SY88982, SY89307 and
other drivers
⢠NVRAM to support GBIC/SFP serial ID function
⢠User writable EEPROM scratchpad
⢠Diagnostic monitoring interface per SFF-8472
â Monitors and reports critical parameters:
temperature, bias current, TX and RX optical power,
and supply voltage
â S/W control and monitoring of TXFAULT, RXLOS,
RATESELECT, and TXDISABLE
â Internal or external calibration
â EEPOT for adjusting RX power measurement
⢠Power-on hour meter
⢠Interrupt capability
⢠Extensive test and calibration features
⢠2-wire I2C compatible serial interface
⢠SFP MSA and SFF-8472 compliant
⢠3.0V to 3.6V power supply range
⢠5V-tolerant I/O
⢠4mm à 4mm 24-pin MLF⢠package
Applications
⢠SFF/SFP optical transceivers
⢠SONET/SDH transceivers and transponders
⢠Fibre channel transceivers
⢠10Gbps transceivers
⢠Free space optical communications
⢠Proprietary optical links
Ordering Information
Part Number
MIC3001BML
Junction Temp. Range
â45°C to +105°C
Package
24-pin MLFâ¢
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
Micrel, Inc. ⢠1849 Fortune Drive ⢠San Jose, CA 95131 ⢠USA ⢠tel + 1 (408) 944-0800 ⢠fax + 1 (408) 474-1000 ⢠http://www.micrel.com
August 2004
1
M9999-082404
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