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MAX3264, MAX3265, MAX3268, MAX3269, MAX3765, MAX3768
+3.0V to +5.5V, 1.25Gbps/2.5Gbps Limiting Amplifiers

Limiting Amplifier with Squelch Function Generates Low Deterministic Jitter

Recommended Upgrades for New Designs
Part Number Replacement Explanation
MAX3264C/D n/a This part remains available but is not recommended for new designs.
MAX3264CUE n/a
MAX3264CUE+ n/a
MAX3265 MAX3272A Improved Performance and Features
MAX3265C/D MAX3272A
MAX3265CUB MAX3272A
MAX3265CUB+ MAX3272A
MAX3265CUE MAX3272A
MAX3265CUE+ MAX3272A
MAX3265EUE MAX3272A
MAX3265EUE+ MAX3272A
MAX3765CUB n/a This part remains available but is not recommended for new designs.
MAX3765CUB+ n/a


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Description
FULL DATA SHEET (PDF, 992kB)
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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   Applications/Uses
  • +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

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

    Key Specifications:   Limiting Amplifiers
    Part Number Target Operating Range (Gbps) Min. Data Rate (Mbps) Max. Data Rate (Mbps) Supply Voltage (V) Typ. Supply Current (mA) I/O Type Input Sens. (mV) Min. LOS Sens. (mV) Max. Edge Speed (ps) EV-Kit Package Price**
    MAX3268  1 to 4.5 1062 1250 3.3
    5
    62 PECL 5 1.2 300 Yes uMAX/10 $4.00 @ 1k
    MAX3269  5 to >10 2125 2500 76 10 2.2 150 $4.40 @ 1k
    See All Limiting Amplifiers (15)
    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.

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    Document Ref.: 19-1523; Rev 7; 2006-03-03
    This page last modified: 2007-06-04



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