The MIC3000 enables the implementation of sophisticated, hot-pluggable fiber optic transceivers with intelligent laser control and a Digital Diagnostic Monitoring Interface per SFF-8472. It essentially integrates all non-datapath functions of an SFP transceiver into a tiny 4x4mm MicroLeadFrame• package.

A highly configurable Average Power Control circuit controls laser bias. Bias and modulation are temperature compensated using dual DAC’s, an onchip temperature sensor, and NVRAM look-up tables. Controlled laser turn-on facilitates hotplugging.

An analog-to-digital converter measures temperature, voltage, bias current, transmit power, and received 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.

An interrupt output, Power-On Hour meter, and dataready 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 realtime clock and stores the result in NVRAM.

Communication with the MIC3000 is via an industry standard 2-wire serial interface. Non-volatile memory is provided for serial ID, configuration, and separate OEM and user scratchpad spaces. Two-level password protection guards against data corruption.

• Average Power Control or constant-current bias
• 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 lookup tables
• Direct interface to SY88932, SY100EP16VS and
• other drivers
• NVRAM to support GBIC/SFP serial ID function
• User writable NVRAM scratchpad
• Diagnostic Monitoring Interface per SFF-8472
• Monitors and reports critical parameters:
• Temperature, Bias current, TX & RX
• Optical Power, & Supply voltage
• S/W control and monitoring of TXFAULT,
• RXLOS, RATESELECT, and TXDISABLE
• Power-On Hour Meter
• Interrupt capability
• Extensive test and calibration features
• 2-wire I2C compatible serial interface
• SFP MSA & SFF-8472 compliant
• 3.0V to 3.6V power supply range
• 4 x 4mm 24-pin MicroLeadFramePackage

• SFF/SFP Optical Transceivers
• SONET/SDH Transceivers
• GBICs
• Fibre Channel transceivers
• Proprietary Optical Links