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MAX3740A
3.2Gbps SFP VCSEL Driver with Diagnostic Monitors


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Data Sheet
FULL DATA SHEET (PDF, 428kB)
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Description
The MAX3740A 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 generator, a laser modulator, and comprehensive safety features. 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 MAX3740A 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 compensation is provided to keep the optical extinction ratio within specifications over the operating temperature range. The MAX3740A interfaces with the Dallas DS1858 to meet SFF-8472 timing and diagnostic requirements. The MAX3740A accommodates various VCSEL packages, including low-cost TO-46 headers.

The MAX3740A 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 MAX3740A is available in a compact 4mm x 4mm, 24-pin thin QFN package and operates over the -40°C to +85°C temperature range.

Key Features   Applications/Uses
  • Supports all SFF-8472 Digital Diagnostics
  • 2mA to 15mA Modulation Current
  • 1mA to 15mA Bias Current
  • Optional Peaking Current to Improve VCSEL Edge Speed
  • Supports Common Cathode and Differential Configuration
  • Automatic Power Control
  • Safety Circuits Compliant with SFF and SFP MSAs
  • 4mm x 4mm 24-Pin Thin QFN Package

 
  • Fibre Channel Optical Transmitters
  • Gigabit Ethernet Optical Transmitters
  • InfiniBand® Optical Transmitters
  • Multirate (1Gbps to 3.2Gbps) SFF/SFP Modules

    Key Specifications:   Laser Drivers
    Part Number Applications Target Operating Range (Gbps) Min. Data Rate (Mbps) Max. Data Rate (Mbps) Supply Voltage (V) Typ. Supply Current (mA) I/O Type Max. IMod (mA) Max. IBias (mA) EV-Kit RoHS Available Package Operating Temp. Range (°C) Price**
    MAX3740A 
    Optical Module
    SFP/SFF Optical Modules
    1 to 4.5 1000 3200 3.3 55 CML 15 15 Yes Yes THIN QFN/24 -40 to +85 $4.40 @ 1k
    See All Laser Drivers (33)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX3740A: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  • Application Note 3766: HFTA-12.0: Measuring Crosstalk Penalty in High-Speed Bidirectional Serial Communication Modules - MAX3740A, MAX3740A

    Evaluation Kits
  • MAX3740AEVKIT

    Design Guides
  • FIBER (PDF)
  • COMMUNICATIONS (PDF)

    Reliability Reports
  • Show FIT data for:
  • Request Reliability Report for:

    Software/Models
  • MAX3740AETG IBIS Model

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-4 of 4

    MAX3740A Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX3740AETG  
    THIN QFN;24 pin;
    Dwg: 21-0139I (PDF)
    Use pkgcode/variation: T2444-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3740AETG-T  
    THIN QFN;24 pin;
    Dwg: 21-0139I (PDF)
    Use pkgcode/variation: T2444-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX3740AETG+  
    THIN QFN;24 pin;
    Dwg: 21-0139I (PDF)
    Use pkgcode/variation: T2444+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX3740AETG+T  
    THIN QFN;24 pin;
    Dwg: 21-0139I (PDF)
    Use pkgcode/variation: T2444+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

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     Description 
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    Document Ref.: 19-3118; Rev 2; 2006-05-11
    This page last modified: 2007-08-24



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