SFP+ Optical Module Controller has digital laser diode driver interface.
Press Release Summary:
Model DS1878 SFP+ controller features digital laser diode driver interface, for communication with laser driver/limiting amplifier. Laser modulation is controlled with temperature-driven lookup table, and 2 additional 9-bit delta-sigma DAC outputs with 36-entry LUTs are provided. Operating in temperatures from -40 to +95°C, pluggable I2C controller monitors 6 analog channels: temperature, Vcc, and MON1 to MON4. Product is contained in 5 x 5 mm, 28-pin TQFN package.
Original Press Release:
SFP+ Optical Module Controller Implements a Fully Compliant SFF-8472 Module without Software Development
Maxim's new state-machine-based DS1878 SFP+ controller includes a digital LDD interface for communication with a laser driver/limiting amplifier.
SUNNYVALE, CA - Maxim Integrated Products (NASDAQ: MXIM) introduces the DS1878, a small form factor pluggable (SFP+) controller with a digital laser diode driver (LDD) interface. State machine based, the DS1878 eliminates the tedious software development process. It enables efficient implementation of the SFF-8472 specification and greatly reduces the time to market. Moreover, as the most reliable I2C controller available to optical transceiver designers, the DS1878 enhances the reliability of SFP+ optical transceiver modules.
The DS1878 controls and monitors all functions for SFF, SFP, and SFP+ optical modules and fully supports the SFF-8472 standard. It can be combined with a MAX3798 or MAX3799 SFP+ laser driver/limiting amplifier to provide an automatic power control (APC) loop, modulation current control, and eye safety functionality-the core feature set of SFP and SFP+ optical modules. The DS1878 also works with the MAX3945 limiting amplifier or the MAX3946 LDD to support 10GHz applications featuring distributed feedback (DFB) or electro-absorption-modulated (EML) lasers.
Laser modulation is controlled with a dedicated temperature-driven lookup table (LUT). Two additional 9-bit delta-sigma DAC outputs with 36-entry LUTs are provided. The DS1878 monitors six analog channels: temperature, Vcc, and MON1 to MON4; MON3 is a fully differential input.
The DS1878 is specified over the -40 degrees Celsius to +95 degrees Celsius temperature range. It uses 0.35micrometer technology to enable the high level of integration required for SFF-8472 implementation in a small 5mm x 5mm, 28-pin TQFN package with exposed pad. Pricing begins at $1.33 (1000-up, FOB USA).
Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, it has developed over 6400 products serving the industrial, communications, consumer, and computing markets.
Maxim reported revenue of approximately $2.0 billion for fiscal 2010. A Fortune 1000 company, Maxim is included in the Nasdaq 100, the Russell 1000, and the MSCI USA indices. For more information, go to www.maxim-ic.com.
DATA SHEET: A Data Sheet for this product is available on the web.
http://www.maxim-ic.com/DS1878
