MIC3001
FOM Management IC with Internal
Calibration
Consider MIC3002 for New Designs
General Description
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
The MIC3001 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®
package. It 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
unprecedented dynamic range for 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.
– Monitors and reports critical parameters:
temperature, bias current, TX and RX optical power,
– S/W control and monitoring of TXFAULT, RXLOS,
RATESELECT, and TXDISABLE
– Internal or external calibration
– 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
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.
• 4mm x 4mm 24-pin MLF® package
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.
Applications
• SFF/SFP optical transceivers
• SONET/SDH transceivers and transponders
• Fibre channel transceivers
• 10Gbps transceivers
• Free space optical communications
• Proprietary optical links
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
M9999-082404-A
hbwhelp@micrel.com or (408) 955-1690
August 2004