125Mbps to 2.125Gbps VCSEL Driver/Postamp with Digital Diagnostics

The PHY1071-01 is a combined VCSEL driver and limiting amplifier with support for digital diagnostic monitoring for use within small form factor modules for Fibre Channel applications.

The transmitter integrates a high-speed output stage with programmable bias and modulation currents, controlled through a 2-wire serial interface. The mean power control loop allows connection in both common cathode and common anode configurations. A loss-of-signal (LOS) detector is included with detection based on either the receiver photo-detector average current or received-signal modulation amplitude.

When used in digital-diagnostics mode, the integrated A/D converters measuring temperature, Tx bias, supply voltage, Rx signal strength and mean power are read through a 2-wire serial interface. An external microcontroller unit (MCU) is used for calibrating real-time diagnostic monitors and alarm generation.

Applications

* SFF and SFP Modules * SONET, Fibre Channel, GbE

* Multirate from 125Mbps to 2.125Gbps

* VCSEL Driver Output Stage with 16mA max Modulation Drive and 20mA Bias Current

* Programmable Mean Power Control Loop

* Temperature-Compensated Modulation Current

* Integrated Limiting Amplifier with Selectable Swing CML Output to Reduce Radiated Emissions

* Programmable Receiver Lowpass Filter

* Integrated LOS Function

* Digital-Diagnostic Mode Compliant with SFF-8472 Using an External MCU

* Stand-Alone Mode Where Device Parameters are Loaded from an External EEPROM

* -40&deg to +85°C Operating Temperature Range

* 6mm x 6mm, 36-Pin QFN Package

* Eye Safety Logic