CS6706

www.DataSheet4U.com Century Semiconductor Inc. GENERAL DESCRIPTION The CS6706 is a high-speed fiber optic VCSEL driver suited for applications up to 1.25Gbps. The CS6706 accepts differential PECL inputs, and includes a CMOS disable pin for bias and modulation current control. Further, the bias and modulation current can be set independently via two external resistors, and the rise/fall time can also be adjusted using external resistors. A monitor photodiode can be incorporated in the application circuit to ensure a stable laser power source. Any failure of the laser is detected using the two on-chip window comparators. Once a failure is detected, the laser power safety switch will be triggered and can only be reset by a power off condition. The slow start feature allows bias current to settle before modulation current output begins, to protect the laser. FEATURES CS6706 1.25Gbps Fiber-Optic VCSEL/Laser Driver Rise/fall time < 200ps, ideally suited for application up to 1.25Gbps. Independently programmable laser bias and modulation current: bias current to 60mA and modulation current to 45mA. Differential PECL inputs. Automatic laser power control with monitor circuit. Slow start and safety switch. Laser failure indication. Programmable rise/fall time. Supports both 3.3 and 5 Volt operation. Available as die or TSSOP-20 package. APPLICATIONS FDDI Fiber Channel 100 SONET OC-12/OC-24 Fast Ethernet Gigabit Ethernet VCSEL Driver Transmitters BLOCK...