Date: 17/03/2010

Maxim's new SFP+ optical module controller with analog LDD interface

Maxim has introduced the DS1873 SFP+ controller with analog LDD interface. Combined with the MAX3736 laser driver, the DS1873 controls and monitors all functions for SFF, SFP, and SFP+ optical modules, while fully supporting the SFF-8472 standard.

Laser modulation is controlled by a temperature driven LUT. Two additional 9-bit DAC outputs with 36-entry LUTs are provided. The DS1873 monitors six analog channels: temperature, VCC, and MON1-MON4. MON3 is a fully differential input.
The DS1873 is fully specified over the -40°C to +95°C temperature range, and is available in a 28-pin 5mmx5mm TQFN package with exposed pad. Pricing begins at $1.39 (1000-up, FOB USA).