DESCRIPTION

The SY88902 is a high speed current switch for driving a semiconductor laser diode in optical transmission applications. The output current, or modulation current IMOD, is DC current controlled by IRSET, current through the resistor RSET. The output OUT is HIGH when output enable is HIGH.

FEATURES

■ Up to 1.25Gbps operation

■ 25mA peak drive current

■ Separate modulation control

■ Separate output enable for laser safety

■ Differential inputs for data

■ 75KΩ input pulldown resistor

■ Single power supply

■ Designed for use with SY88903 and SY88904

■ Available in a tiny 10-pin (3mm) MSOP

APPLICATIONS

■ 1.25Gbps Gigabit Ethernet

■ 531Mbps and 1062Mbps Fibre Channel

■ 622Mbps SONET

■ Gigabit Interface Converter