3.2gbps Sfp Vcsel Driver With Diagnostic Monitors Integrated Products

The MAX3740 is a high-speed VCSEL Driver for small- form-factor (SFF) and small-form-factor pluggable (SFP) Fiber Optic LAN transmitters. It contains a bias genera- tor, a laser Modulator and comprehensive safety fea- tures. The Automatic power control (APC) adjusts the laser bias current to maintain average optical power over changes in temperature and laser properties. The driver accommodates common cathode and differential configurations. The MAX3740 operates up to 3.2Gbps. It CAN Switch up to 15mA of laser modulation current and source up to 15mA of bias current. Adjustable temperature compen- sation is provided to keep the optical extinction ratio within specifications over the operating temperature range. The MAX3740 Interfaces with the Dallas DS1858 to meet SFF-8472 Timing and diagnostic requirements. The MAX3740 accommodates various VCSEL pack- ages, including low-cost TO-46 headers. The MAX3740 safety circuit detects faults that could cause hazardous light levels and disables the VCSEL output. The safety circuits are compliant with SFF and SFP multisource agreements (MSA). The MAX3740 is available in a compact 4mm 4mm, 24-pin thin QFN package and operates over the -40C to +85C temperature range. By Maxim Integrated Products