MAX3872

NOT RECOMMENDED FOR NEW DESIGNS

Multirate Clock and Data Recovery with Limiting Amplifier

Multirate CDR with Limiting Amplifier Exceeds All SONET/SDH Jitter Specifications

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Overview

  • Multirate Data Input: 2.667Gbps (FEC), 2.488Gbps, 1.244Gbps, 622.08Mbps, 155.52Mbps, 1.25Gbps/2.5Gbps (Ethernet)
  • Reference Clock Not Required for Data Acquisition
  • Exceeds ANSI, ITU, and Bellcore SONET/SDH Jitter Specifications
  • 2.7mUIRMS Jitter Generation
  • 10mVP-P Input Sensitivity Without Threshold Adjust
  • 0.65UIP-P High-Frequency Jitter Tolerance
  • ±170mV Input Threshold Adjust Range
  • Clock Holdover Capability Using Frequency-Selectable Reference Clock
  • Serial Loopback Input Available for System Diagnostic Testing
  • Loss-of-Lock (Active-Low LOL) Indicator

The MAX3872 is a compact, multirate clock and data recovery with limiting amplifier for OC-3, OC-12, OC-24, OC-48, OC-48 with FEC SONET/SDH and Gigabit Ethernet (1.25Gbps/2.5Gbps) applications. Without using an external reference clock, the fully integrated phase-locked loop (PLL) recovers a synchronous clock signal from the serial NRZ data input. The input data is then retimed by the recovered clock, providing a clean data output. An additional serial input (SLBI±) is available for system loopback diagnostic testing. Alternatively, this input can be connected to a reference clock to maintain a valid clock output in the absence of data transitions. The device also includes a loss-of-lock (active-low LOL) output.

The MAX3872 contains a vertical threshold control to compensate for optical noise due to EDFAs in DWDM transmission systems. The recovered data and clock outputs are CML with on-chip 50Ω back termination on each line. Its jitter performance exceeds all SONET/SDH specifications.

The MAX3872 operates from a single +3.3V supply and typically consumes 580mW. It is available in a 5mm x 5mm 32-pin thin QFN with exposed-pad package and operates over a -40°C to +85°C temperature range.

Applications

  • Access Networks
  • Add/Drop Multiplexers
  • Digital Cross-Connects
  • DWDM Transmission Systems
  • SONET/SDH Receivers and Regenerators
  • SONET/SDH Test Equipment

MAX3872
Multirate Clock and Data Recovery with Limiting Amplifier
MAX3872: Typical Operating Circuit
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Tools & Simulations


Evaluation Kits

MAX3872EVKIT

Evaluation Kit for the MAX3872, MAX3874

Features and Benefits

  • SMA Connectors for All High-Speed I/Os
  • Operational Mode Select Pins
  • Loss-of-Lock LED
  • Single +3.3V Power-Supply Operation
  • Fully Assembled and Tested

Product Details

The MAX3872/MAX3874 evaluation kits (EV kits) simplify evaluation of the MAX3872 and MAX3874 clock and data recovery with limiting amplifier ICs. These EV kits enable testing of all MAX3872 and MAX3874 functions. SMA connectors are provided for the differential inputs and outputs. All high-speed inputs and outputs have on-board AC-coupling capacitors to allow direct connection to 50Ω test equipment.

MAX3874EVKIT

Evaluation Kit for the MAX3872, MAX3874

Features and Benefits

  • SMA Connectors for All High-Speed I/Os
  • Operational Mode Select Pins
  • Loss-of-Lock LED
  • Single +3.3V Power-Supply Operation
  • Fully Assembled and Tested

Product Details

The MAX3872/MAX3874 evaluation kits (EV kits) simplify evaluation of the MAX3872 and MAX3874 clock and data recovery with limiting amplifier ICs. These EV kits enable testing of all MAX3872 and MAX3874 functions. SMA connectors are provided for the differential inputs and outputs. All high-speed inputs and outputs have on-board AC-coupling capacitors to allow direct connection to 50Ω test equipment.

MAX3872EVKIT
Evaluation Kit for the MAX3872, MAX3874
MAX3874EVKIT
Evaluation Kit for the MAX3872, MAX3874

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