1.25Gbps to 2.5Gbps SFP Laser Transceiver

2.5Gbps Transceiver with Integrated DDM and APD Controller

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The MAX24002 is a complete laser driver transmitter and limiting amplifier receiver for use within fiber optic modules for SFP applications. A fully compliant SFP module with digital diagnostics is realized when used with a 2KB EEPROM and suitable optics. Alternatively, a microcontroller is used in conjunction with the MAX24002; however, this is not a necessity to achieve SFF-8472 compliance.

The 2.5Gbps limiting receive path features programmable output swing control, rate selection, and OMA-based loss-of-signal detection. Functions are also provided that facilitate the implementation of APD biasing without the need for an external DC-DC converter.

The laser driver has temperature-compensated modulation control using a lookup table. Closed-loop control of laser power incorporates tracking error compensation. This is linked to a laser safety system which allows the modulation and bias currents to be shut off in response to a range of different fault conditions detected on-chip.

The MAX24002 is highly configurable from either EEPROM or a low-cost microcontroller using a two-wire interface.
MAX24002: Functional Diagram MAX24002: Functional Diagram Enlarge+

Key Features

  • 1.25Gbps to 2.5Gbps Limiting Receiver
  • Integrated APD Bias Loop with Overvoltage and Overcurrent Protection
  • OMA-Based LOS Detection
  • 1.25Gbps to 2.5Gbps Laser Driver
  • CML, LVPECL-Compatible Inputs
  • Open and Closed-Loop Bias Control
  • Temperature-Compensated IMOD Control
  • Highly Configurable Laser Safety System
  • SFP MSA and SFF-8472 Digital Diagnostics
  • Integrated Temperature Sensor
  • External DAC, ADC, and PWM Interfaces


  • OC-48, Gigabit Ethernet

Tools & Models

  • MAX24002 IBIS Model
  • Product Reliability Reports: MAX24002.pdf 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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