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+3.0V to +5.5V, 1.25Gbps/2.5Gbps Limiting Amplifiers

Limiting Amplifier with Squelch Function Generates Low Deterministic Jitter

Product Details

The 1.25Gbps MAX3264/MAX3268/MAX3768 and the 2.5Gbps MAX3265/MAX3269/MAX3765 limiting amplifiers are designed for Gigabit Ethernet and Fibre Channel optical receiver systems. The amplifiers accept a wide range of input voltages and provide constant-level output voltages with controlled edge speeds. Additional features include RMS power detectors with programmable loss-of-signal (LOS) indication, an optional squelch function that mutes the data output signal when the input voltage falls below a programmable threshold, and excellent jitter performance.

The MAX3264/MAX3265/MAX3765 feature current-mode logic (CML) data outputs that are tolerant of inductive connectors and a 16-pin TSSOP package, making these circuits ideal for GBIC receivers. The MAX3268/ MAX3269/MAX3768 feature standards-compliant positive-referenced emitter-coupled logic (PECL) data outputs and are available in a tiny 10-pin µMAX® package that is ideal for small-form-factor (SFF) receivers.

Key Features

  • +3.0V to +5.5V Supply Voltage
  • Low Deterministic Jitter
    • 14ps (MAX3264)
    • 11ps (MAX3265/MAX3765)
      • 150ps (max) Edge Speed (MAX3265/MAX3765)
      • 300ps (max) Edge Speed (MAX3264)
      • Programmable Signal-Detect Function
      • Choice of CML or PECL Output Interface
      • 10-Pin µMAX or 16-Pin TSSOP Package

Applications/Uses

  • ATM Optical Receivers
  • Fibre Channel Optical Receivers
  • Gigabit Ethernet Optical Receivers
  • System Interconnect

Simplified Block Diagram

MAX3264, MAX3265, MAX3268, MAX3269, MAX3765, MAX3768: Typical Operating Circuit MAX3264, MAX3265, MAX3268, MAX3269, MAX3765, MAX3768: Typical Operating Circuit Zoom icon

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Parameters

Key Features

  • +3.0V to +5.5V Supply Voltage
  • Low Deterministic Jitter
    • 14ps (MAX3264)
    • 11ps (MAX3265/MAX3765)
      • 150ps (max) Edge Speed (MAX3265/MAX3765)
      • 300ps (max) Edge Speed (MAX3264)
      • Programmable Signal-Detect Function
      • Choice of CML or PECL Output Interface
      • 10-Pin µMAX or 16-Pin TSSOP Package

Applications/Uses

  • ATM Optical Receivers
  • Fibre Channel Optical Receivers
  • Gigabit Ethernet Optical Receivers
  • System Interconnect

Description

The 1.25Gbps MAX3264/MAX3268/MAX3768 and the 2.5Gbps MAX3265/MAX3269/MAX3765 limiting amplifiers are designed for Gigabit Ethernet and Fibre Channel optical receiver systems. The amplifiers accept a wide range of input voltages and provide constant-level output voltages with controlled edge speeds. Additional features include RMS power detectors with programmable loss-of-signal (LOS) indication, an optional squelch function that mutes the data output signal when the input voltage falls below a programmable threshold, and excellent jitter performance.

The MAX3264/MAX3265/MAX3765 feature current-mode logic (CML) data outputs that are tolerant of inductive connectors and a 16-pin TSSOP package, making these circuits ideal for GBIC receivers. The MAX3268/ MAX3269/MAX3768 feature standards-compliant positive-referenced emitter-coupled logic (PECL) data outputs and are available in a tiny 10-pin µMAX® package that is ideal for small-form-factor (SFF) receivers.

Simplified Block Diagram

MAX3264, MAX3265, MAX3268, MAX3269, MAX3765, MAX3768: Typical Operating Circuit MAX3264, MAX3265, MAX3268, MAX3269, MAX3765, MAX3768: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal