VSC7981

The VSC7980, VSC7981 and VSC7982 are low power 10Gb/s laser and modulator drivers for both Telecommunications and Data Communications. Applications include modules and line cards for OC-192/STM-64 SONET/SDH as well as 10GE/10GFC protocols. The VSC7980 is intended to drive Vertical Cavity Surface Emitting Lasers (VCSEL). The VSC7981 is intended to drive Direct Modulated Lasers (DML) such as Distributed Feedback (DFB) and Fabry-Perot (FP) Lasers with a 25 Ohm characteristic impedance. The VSC7982 is intended to drive DML and Externally Modulated Lasers (EML) such as Electro Absorption modulators with a 50 Ohm characteristic impedance.

The 50 Ohm on-chip back-termination simplifies the process of matching the laser to the driver. The VSC7980, VSC7981 and VSC7982 are equipped with XFP-compliant fault indicators (FLTN_DISN and EOLN), dual disable control (FLTN_DISN and TX_DIS), Automatic Power Control (APC), temperature sensor, voltage reference, various eye safety features and Extinction Ratio Control (ERC) with an external micro controller. These device controls and monitors were designed to be controlled with set resistors, potentiometers, or Digital-to-Analog Converters (DACs) and monitored with Analog-to-Digital Converters (ADCs) for ultimate flexibility in module design. The VSC7980, VSC7981 and VSC7982 are available in a 5mm x 5mm 32-pin plastic QFP-N package.