TRANSPORT PRODUCTS VSC7975, VSC7977 1/2/4 Gbps Multirate Transimpedance Amplifier A P P L I C AT I O N D I A G R A M : VCSEL VSC7977 Receiver VSC7964 Limiting Amplifier and VCSEL Driver Tx Controls/Faults Micro Controller Two-wire interface Rx F E AT U R E S : BENEFITS: Dual Bandwidth Selection Allows the User to Optimize the Bandwidth of the TIA to the Incoming Optical Line Rate, which Improves the Optical Input Sensitivity at Lower Data Rates and Provides Superior Interoperability with Legacy Optical Devices 6kΩ Differential Transimpednace Provides High Gain and Improved Sensitivity Linear Optical Power Monitor Facilitates an Accurate Measurement of the Incoming Optical Power, Enhancing the Diagnostics Capabilities of the System without Using External Components On-chip Photo Diode Filter Provides a Positive Bias to the Photodetector, Eliminating the Need for External Components Extended Operating Temperature Supports Industrial Temperature Applications Available as Bare Dice or in a 5-pin TO-46 Package Available in a TO-46 Package, Reducing the Time and Costs Associated with the Design, Assembly and Test of the Receiver S P E C I F I C AT I O N S : A P P L I C AT I O N S : Input Noise: 400nA Gigabit Ethernet Transceivers Supply Current: 30mA Fibre Channel Transceivers (1x, 2x and 4x) Sensitivity at 4.25G (in OMA): 18.4dBm Infiniband Transceivers Max Input Current: 2.2 mA Supply Voltage: 3.3V Operating Temp: -40C to +105C (Case) PB-VSC7975,7977-001 VSC7975, VSC7977 1/2/4 Gbps Multirate Transimpedance Amplifier GENERAL DESCRIPTION: The VSC7975 and VSC7977 are multirate transimpedance amplifiers for Gigabit Ethernet, Fibre Channel, and Infiniband applications. The devices provide a means for adjusting their bandwidth to allow full compliance with multiple Gigabit Ethernet, Fibre Channel, and Infiniband standards. The VSC7975 and VSC7977 are equipped with a single pin that serves both as a control for bandwidth as well as a linear received optical power monitor. This allows the device to have multirate bandwidth control, power monitoring, and differential outputs and be assembled in a standard 5-pin TO46 package. A space-saving filter connection is provided for positive bias to the photodiode through a filter resistor to VCC. The VSC7977 is available in die form or 5-pin TO-46 package with short wavelength PIN photo detector. The VSC7975 is available in a 5-pin TO-46 package with long wavelength PIN photo detector. BLOCK DIAGRAMS: For more information on Vitesse Products visit the Vitesse web site at www.vitesse.com or contact Vitesse Sales at (800) VITESSE or [email protected] ©2004 Vitesse Semiconductor Corporation 741 Calle Plano Camarillo, CA 93012, USA Tel: +1 805.388.3700 Fax: +1 805.987.5896 www.vitesse.com